:root{
  --bg:#f6f8fc;--card:rgba(255,255,255,.88);--ink:#172033;--muted:#69758a;--line:#dfe5ef;
  --primary:#3157d5;--primary-2:#243f9f;--soft:#edf2ff;--success:#1f9d72;--danger:#d45454;
  --shadow:0 24px 60px rgba(41,55,89,.12);--radius:24px;
}
*{box-sizing:border-box}html{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--ink)}body{margin:0;min-height:100vh;background:linear-gradient(135deg,#f7f9fd 0%,#f3f7ff 55%,#fafafa 100%)}button,input,select{font:inherit}.ambient{position:fixed;border-radius:50%;filter:blur(90px);opacity:.35;pointer-events:none}.ambient-a{width:340px;height:340px;background:#b8c8ff;top:-120px;left:-80px}.ambient-b{width:280px;height:280px;background:#e1d8ff;bottom:-100px;right:-60px}.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:.72rem;font-weight:800;color:var(--primary);margin:0 0 9px}.lead{color:var(--muted);line-height:1.65}.login-shell{min-height:100vh;display:grid;place-items:center;padding:30px}.login-card{width:min(620px,100%);background:var(--card);border:1px solid rgba(255,255,255,.7);backdrop-filter:blur(24px);box-shadow:var(--shadow);border-radius:32px;padding:48px}.brand-mark{width:54px;height:54px;border-radius:17px;display:grid;place-items:center;background:var(--ink);color:white;font-weight:900;letter-spacing:.03em;margin-bottom:28px}.login-card h1{font-size:clamp(2rem,5vw,3.2rem);line-height:1.02;margin:0 0 16px;letter-spacing:-.045em}.feature-row{display:flex;gap:10px;flex-wrap:wrap;margin:26px 0}.feature-row span,.unit-badge{padding:8px 12px;border-radius:999px;background:var(--soft);color:var(--primary-2);font-size:.78rem;font-weight:800}.login-form{display:grid;gap:16px;margin-top:25px}.login-form label{display:grid;gap:8px;font-weight:700;font-size:.86rem}.login-form input{width:100%;border:1px solid var(--line);border-radius:14px;background:white;padding:15px 16px;outline:none;transition:.2s}.login-form input:focus,.match-row select:focus{border-color:#8aa1ef;box-shadow:0 0 0 4px rgba(49,87,213,.08)}.primary-btn,.ghost-btn,.submit-btn{border:0;border-radius:14px;min-height:48px;padding:0 18px;display:inline-flex;align-items:center;justify-content:center;gap:10px;font-weight:850;text-decoration:none;cursor:pointer}.primary-btn{background:var(--primary);color:#fff;box-shadow:0 10px 22px rgba(49,87,213,.22)}.primary-btn:hover{background:var(--primary-2)}.primary-btn.compact{min-height:44px}.ghost-btn{background:white;color:var(--ink);border:1px solid var(--line)}.ghost-btn:disabled{opacity:.4;cursor:not-allowed}.submit-btn{background:#172033;color:#fff}.notice-card,.sidebar-tip,.report-note{margin-top:24px;padding:16px 18px;border-radius:16px;background:#f8fafc;border:1px solid var(--line);color:var(--muted);font-size:.86rem;line-height:1.5}.notice-card strong,.sidebar-tip strong{color:var(--ink)}.notice-card p,.sidebar-tip p{margin:6px 0 0}.teacher-link{display:inline-block;margin-top:22px;color:var(--muted);font-weight:700;font-size:.85rem;text-decoration:none}.teacher-link:hover{color:var(--primary)}.toast-stack{position:fixed;z-index:20;right:20px;top:20px}.toast{padding:12px 16px;background:white;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);font-weight:700}.toast.error{border-color:#f4bcbc;color:#9f3030}
.app-shell{width:min(1440px,100%);margin:auto;padding:24px 32px 40px}.topbar{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:10px 0 24px;border-bottom:1px solid var(--line)}.topbar h1,.teacher-header h1{margin:0;font-size:1.55rem;letter-spacing:-.025em}.student-chip{display:flex;align-items:center;gap:10px;background:white;border:1px solid var(--line);border-radius:16px;padding:8px 12px}.avatar{width:38px;height:38px;border-radius:12px;background:var(--ink);color:white;display:grid;place-items:center;font-weight:900}.student-chip div:last-child{display:grid}.student-chip small{color:var(--muted);margin-top:2px}.exam-layout{display:grid;grid-template-columns:270px minmax(0,1fr);gap:38px;padding-top:28px}.exam-sidebar{position:sticky;top:20px;align-self:start}.progress-card{display:flex;align-items:center;gap:14px;background:white;border:1px solid var(--line);border-radius:18px;padding:14px}.progress-ring{--p:0deg;width:58px;height:58px;border-radius:50%;background:conic-gradient(var(--primary) var(--p),#e8edf5 0);display:grid;place-items:center;position:relative}.progress-ring:before{content:"";position:absolute;width:46px;height:46px;border-radius:50%;background:white}.progress-ring span{position:relative;font-size:.72rem;font-weight:900}.progress-card div:last-child{display:grid}.progress-card small{color:var(--muted)}.section-nav{display:grid;gap:8px;margin-top:18px}.section-nav button{width:100%;border:0;background:transparent;border-radius:14px;padding:11px 10px;display:flex;align-items:center;gap:10px;text-align:left;color:var(--ink);cursor:pointer}.section-nav button:hover{background:rgba(255,255,255,.7)}.nav-dot{width:9px;height:9px;border-radius:50%;background:#c7cfdd}.section-nav button.complete .nav-dot{background:var(--success)}.section-nav button span:last-child{display:grid}.section-nav small{color:var(--muted);margin-top:2px}.exam-main{max-width:900px;width:100%;margin:0 auto}.question-card{background:white;border:1px solid var(--line);border-radius:28px;padding:34px 38px;box-shadow:0 16px 40px rgba(62,77,110,.07);min-height:500px}.question-meta{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:.78rem;font-weight:800}.question-number{margin-left:auto}.question-card h2{font-size:clamp(1.45rem,3vw,2rem);line-height:1.3;letter-spacing:-.025em;margin:24px 0 28px}.choice-grid{display:grid;gap:12px}.choice-option{position:relative;display:flex;align-items:center;gap:14px;border:1px solid var(--line);border-radius:16px;padding:14px 16px;cursor:pointer;transition:.18s;background:#fff}.choice-option:hover{border-color:#b5c3ec;background:#fbfcff}.choice-option:has(input:checked){border-color:var(--primary);background:var(--soft);box-shadow:0 0 0 2px rgba(49,87,213,.07)}.choice-option input{position:absolute;opacity:0;pointer-events:none}.choice-letter{width:34px;height:34px;border-radius:10px;background:#f2f5f9;display:grid;place-items:center;font-weight:900;color:var(--muted)}.choice-option:has(input:checked) .choice-letter{background:var(--primary);color:white}.instruction{color:var(--muted);font-size:.9rem;margin-top:-12px}.sortable-list{display:grid;gap:10px;margin-top:22px}.sort-item{display:grid;grid-template-columns:36px 1fr auto;align-items:center;border:1px solid var(--line);background:#fff;border-radius:15px;padding:11px 12px;cursor:grab;transition:.15s}.sort-item.dragging{opacity:.45;transform:scale(.99)}.drag-handle{color:#a5afbd;font-weight:900;letter-spacing:-4px}.sort-label{font-weight:750}.sort-actions{display:flex;gap:4px}.sort-actions button{width:34px;height:34px;border:0;border-radius:9px;background:#f2f5f9;cursor:pointer;font-weight:900;color:var(--ink)}.matching-grid{display:grid;gap:12px}.match-row{display:grid;grid-template-columns:1fr 38px 1fr;align-items:center;gap:8px;background:#fafbfd;border:1px solid var(--line);border-radius:15px;padding:12px 14px;font-weight:750}.match-arrow{color:#a5afbd;text-align:center}.match-row select{border:1px solid var(--line);background:white;border-radius:11px;padding:10px 12px;outline:none;color:var(--ink)}.listening-box{display:flex;align-items:center;gap:22px;border:1px solid #d7e2ff;background:linear-gradient(135deg,#f0f5ff,#fafcff);border-radius:18px;padding:16px 18px;margin-bottom:22px}.audio-btn{border:0;background:var(--primary);color:white;border-radius:14px;padding:10px 14px;display:grid;grid-template-columns:auto auto;column-gap:9px;align-items:center;text-align:left;cursor:pointer;min-width:190px}.audio-btn small{grid-column:2;color:#dfe6ff;margin-top:2px}.audio-btn.spent{background:#66708a}.audio-btn.playing .play-icon{animation:pulse 1s infinite}@keyframes pulse{50%{transform:scale(.8);opacity:.6}}.audio-wave{flex:1;display:flex;align-items:center;justify-content:center;gap:5px;height:42px}.audio-wave i{display:block;width:4px;border-radius:99px;background:#9fb1ef;height:14px}.audio-wave i:nth-child(2n){height:28px}.audio-wave i:nth-child(3n){height:20px}.question-footer{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:16px;margin-top:18px}.question-dots{display:flex;justify-content:center;gap:4px;flex-wrap:wrap}.question-dots button{width:7px;height:7px;border:0;border-radius:50%;background:#d3dae5;padding:0;cursor:pointer}.question-dots button.answered{background:#89a1e8}.question-dots button.active{width:20px;border-radius:99px;background:var(--primary)}.modal-backdrop{position:fixed;inset:0;background:rgba(15,23,42,.5);backdrop-filter:blur(6px);z-index:30;display:grid;place-items:center;padding:20px}.modal-backdrop[hidden]{display:none}.review-modal{width:min(520px,100%);background:white;border-radius:26px;padding:32px;box-shadow:0 30px 80px rgba(14,22,45,.2);text-align:center}.modal-icon{width:54px;height:54px;border-radius:18px;background:#e8f8f2;color:var(--success);display:grid;place-items:center;margin:auto;font-size:1.3rem;font-weight:900}.review-modal h2{font-size:1.8rem;margin:18px 0 8px}.review-modal p{color:var(--muted)}.review-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:24px 0}.review-stats div{display:grid;background:#f7f9fc;border-radius:14px;padding:12px}.review-stats strong{font-size:1.35rem}.review-stats span{font-size:.75rem;color:var(--muted)}.modal-actions{display:flex;gap:10px;justify-content:center}
.result-shell{min-height:100vh;padding:40px;display:grid;place-items:center}.result-card{width:min(1000px,100%);background:white;border:1px solid var(--line);border-radius:30px;padding:38px;box-shadow:var(--shadow)}.result-heading{display:flex;justify-content:space-between;align-items:center;gap:20px}.result-heading h1{font-size:2.5rem;margin:0 0 8px;letter-spacing:-.04em}.result-heading p:last-child{color:var(--muted)}.grade-orb{width:110px;height:110px;border-radius:34px;background:var(--ink);color:white;display:grid;place-content:center;text-align:center}.grade-orb strong{font-size:2.4rem;line-height:1}.grade-orb span{font-size:.8rem;color:#cbd5e1;margin-top:5px}.score-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:30px 0}.score-strip div{background:#f7f9fc;border-radius:16px;padding:15px;display:grid}.score-strip span{font-size:.75rem;color:var(--muted);font-weight:700}.score-strip strong{font-size:1.2rem;margin-top:5px}.result-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}.result-grid h2{font-size:1rem;margin:0 0 18px}.metric-row{margin-bottom:15px}.metric-row>div:first-child{display:flex;justify-content:space-between;gap:12px;font-size:.82rem}.metric-row span{color:var(--muted)}.metric-bar{height:7px;border-radius:99px;background:#edf1f6;margin-top:7px;overflow:hidden}.metric-bar i{display:block;height:100%;border-radius:99px;background:var(--primary)}.result-actions{display:flex;gap:10px;margin-top:22px}.teacher-shell{width:min(1280px,calc(100% - 40px));margin:0 auto;padding:34px 0}.teacher-header{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:24px}.teacher-header p:last-child{color:var(--muted)}.teacher-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.teacher-actions form{margin:0}.table-card{background:white;border:1px solid var(--line);border-radius:22px;box-shadow:0 14px 36px rgba(62,77,110,.07);overflow:hidden}.table-scroll{overflow:auto}table{width:100%;border-collapse:collapse;font-size:.88rem}th,td{text-align:left;padding:14px 16px;border-bottom:1px solid #edf0f4;white-space:nowrap}th{font-size:.72rem;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);background:#fafbfd}tbody tr:hover{background:#fcfdff}.grade-pill{display:inline-grid;place-items:center;min-width:42px;padding:5px 8px;border-radius:9px;background:var(--soft);color:var(--primary);font-weight:900}.empty-state{text-align:center;padding:70px 20px}.empty-state div{font-size:2rem}.empty-state p{color:var(--muted)}
@media(max-width:900px){.app-shell{padding:18px}.exam-layout{grid-template-columns:1fr}.exam-sidebar{position:static}.section-nav{display:grid;grid-template-columns:repeat(2,1fr)}.sidebar-tip{display:none}.question-card{min-height:auto}.result-grid{grid-template-columns:1fr}.teacher-header{align-items:flex-start;flex-direction:column}}
@media(max-width:620px){.login-card{padding:28px 22px;border-radius:24px}.topbar{align-items:flex-start;flex-direction:column}.student-chip{width:100%}.question-card{padding:24px 20px;border-radius:22px}.question-footer{grid-template-columns:1fr 1fr}.question-dots{grid-column:1/-1;grid-row:1}.matching-grid .match-row{grid-template-columns:1fr}.match-arrow{transform:rotate(90deg)}.listening-box{align-items:stretch;flex-direction:column}.audio-btn{width:100%}.audio-wave{display:none}.section-nav{grid-template-columns:1fr}.result-shell{padding:20px}.result-card{padding:24px}.result-heading{align-items:flex-start}.grade-orb{width:88px;height:88px;border-radius:26px}.grade-orb strong{font-size:2rem}.score-strip{grid-template-columns:1fr}.result-actions,.modal-actions{flex-direction:column}.teacher-shell{width:min(100% - 24px,1280px)}}
@media print{body{background:#fff}.ambient,.result-actions{display:none}.result-shell{display:block;padding:0}.result-card{box-shadow:none;border:0;padding:0}}

.login-card-basic{width:min(460px,100%);padding:42px}.login-card-basic .lead{margin:0;max-width:42ch}.login-card-basic .teacher-link{display:block;margin-top:18px;text-align:center;font-size:.82rem;color:var(--muted)}
.question-error{margin:0 0 18px;padding:11px 13px;border-radius:12px;background:#fff1f1;color:#9f3030;font-weight:750}.question-invalid{border-color:#e4a2a2}.question-invalid input,.question-invalid select{border-color:#d96a6a}
.score-strip-five{grid-template-columns:repeat(5,1fr)}.grade-orb span{max-width:9ch}.penalty-summary,.teacher-review-panel{margin-top:22px;padding:22px;border-radius:20px;background:#f7f9fc;border:1px solid var(--line)}.penalty-list,.integrity-event-list{display:grid;gap:10px;margin-top:14px}.penalty-row,.integrity-event-list>div{display:flex;justify-content:space-between;gap:14px;padding:12px;background:white;border-radius:13px}.penalty-row>div{display:grid;gap:4px}.penalty-row small{color:var(--muted)}.penalty-row.revoked{opacity:.62}.penalty-form{display:grid;grid-template-columns:140px minmax(220px,1fr) auto;gap:12px;align-items:end}.penalty-form label{display:grid;gap:6px;font-size:.78rem;font-weight:750}.penalty-form input{width:100%;border:1px solid var(--line);border-radius:11px;padding:11px}.integrity-event-list>div{display:grid;grid-template-columns:150px 180px 1fr}.integrity-event-list code{overflow-wrap:anywhere;white-space:normal}.rules-modal{width:min(720px,calc(100vw - 24px));max-height:calc(100dvh - 24px)}.rules-copy{white-space:pre-line;line-height:1.7;color:var(--ink)}.rules-accept{display:flex!important;grid-template-columns:auto 1fr!important;align-items:flex-start;gap:10px!important;padding:14px;border-radius:13px;background:#f2f5fa}.rules-accept input{margin-top:3px}.rules-modal .modal-actions .primary-btn:disabled{opacity:.45;cursor:not-allowed}
@media(max-width:800px){.score-strip-five{grid-template-columns:1fr 1fr}.penalty-form{grid-template-columns:1fr}.integrity-event-list>div{grid-template-columns:1fr}.login-card-basic{padding:30px 22px}}

/* Exam integrity controls */
.secure-exam,.secure-exam *{-webkit-touch-callout:none}
.secure-exam{-webkit-user-select:none;user-select:none}
.secure-exam select,.secure-exam button{-webkit-user-select:none;user-select:none}
.security-card{margin-top:18px;padding:15px 16px;border-radius:16px;background:#111827;color:#fff;display:grid;gap:9px;box-shadow:0 12px 28px rgba(17,24,39,.12)}
.security-head{display:flex;align-items:center;gap:9px}.security-head strong{font-size:.9rem}.shield-icon{width:24px;height:24px;border-radius:8px;display:grid;place-items:center;background:rgba(255,255,255,.12);font-size:.62rem}.security-card small{color:#cbd5e1;line-height:1.4}.focus-mode-btn{border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.08);color:#fff;border-radius:11px;min-height:37px;padding:0 11px;font-size:.78rem;font-weight:800;cursor:pointer}.focus-mode-btn:hover{background:rgba(255,255,255,.14)}.focus-mode-btn.active{background:#e8f8f2;color:#11664d;border-color:#ccecdf}.focus-mode-btn:disabled{opacity:.5;cursor:not-allowed}
.security-notice{position:fixed;z-index:60;left:50%;top:20px;transform:translate(-50%,-16px);max-width:min(92vw,620px);padding:12px 16px;border-radius:14px;background:#172033;color:#fff;box-shadow:0 18px 45px rgba(15,23,42,.25);font-size:.86rem;font-weight:800;opacity:0;pointer-events:none;transition:.2s}.security-notice.show{opacity:1;transform:translate(-50%,0)}
.integrity-summary{margin-top:28px;padding:20px;border:1px solid var(--line);border-radius:18px;background:#fafbfd;display:grid;grid-template-columns:1.1fr 1fr;gap:20px;align-items:center}.integrity-summary h2{margin:0 0 5px}.integrity-summary p:last-child{margin:0;color:var(--muted);font-size:.84rem;line-height:1.5}.integrity-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.integrity-metrics span{display:grid;background:white;border:1px solid var(--line);border-radius:13px;padding:11px;font-size:.72rem;color:var(--muted)}.integrity-metrics strong{font-size:1.05rem;color:var(--ink);margin-bottom:3px}.cell-sub{display:block;color:var(--muted);font-size:.68rem;margin-top:2px}.integrity-pill{display:inline-flex;align-items:center;padding:6px 9px;border-radius:9px;font-size:.72rem;font-weight:850}.integrity-pill.clean{background:#e8f8f2;color:#17684f}.integrity-pill.review{background:#fff1e7;color:#9a4b16}
@media(max-width:900px){.security-card{margin-top:14px}.integrity-summary{grid-template-columns:1fr}}
@media(max-width:620px){.security-notice{top:10px}.integrity-metrics{grid-template-columns:1fr}.security-card{display:grid}.secure-exam{overscroll-behavior:none}}

/* Teacher Assessment Studio */
.teacher-nav{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:30px;padding:10px 0}.teacher-brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none}.teacher-brand>span{width:36px;height:36px;border-radius:12px;background:var(--ink);color:white;display:grid;place-items:center;font-weight:900;font-size:.8rem}.teacher-brand strong{font-size:.95rem}.teacher-nav-links{display:flex;gap:6px;padding:4px;background:#eef2f7;border-radius:14px}.teacher-nav-links a{text-decoration:none;color:var(--muted);font-size:.8rem;font-weight:800;padding:9px 12px;border-radius:10px}.teacher-nav-links a.active{background:#fff;color:var(--ink);box-shadow:0 3px 10px rgba(25,40,70,.08)}.teacher-stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:18px}.teacher-stat-grid article{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;display:grid}.teacher-stat-grid span{font-size:.75rem;color:var(--muted);font-weight:800}.teacher-stat-grid strong{font-size:1.7rem;margin:4px 0}.teacher-stat-grid small{color:var(--muted)}.cell-wrap{display:block;max-width:240px;white-space:normal;line-height:1.35}.bank-header{align-items:flex-end}.type-counts{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.type-counts span{min-width:110px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px;display:grid;color:var(--muted);font-size:.68rem}.type-counts strong{font-size:1.1rem;color:var(--ink)}
.filter-card{display:grid;grid-template-columns:2fr repeat(3,1fr) auto;gap:10px;align-items:end;background:#fff;border:1px solid var(--line);padding:14px;border-radius:18px;margin-bottom:14px}.filter-card label{display:grid;gap:6px}.filter-card label>span,.setup-card label>span,.editor-card label>span{font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-weight:800}.filter-card input,.filter-card select,.bulk-toolbar select,.setup-card input,.setup-card textarea,.question-editor input[type=text],.question-editor input[type=number],.question-editor select,.question-editor textarea,.question-editor input[type=file]{width:100%;border:1px solid var(--line);background:white;border-radius:11px;padding:10px 12px;color:var(--ink);font:inherit;outline:none}.filter-card input:focus,.filter-card select:focus,.setup-card input:focus,.setup-card textarea:focus,.question-editor input:focus,.question-editor select:focus,.question-editor textarea:focus{border-color:#9eb0ea;box-shadow:0 0 0 3px rgba(87,107,189,.09)}.bulk-toolbar{display:flex;align-items:center;gap:10px;padding:10px 2px 14px}.bulk-toolbar>span{margin-left:auto;color:var(--muted);font-size:.78rem}.select-all{font-size:.8rem;font-weight:800}.question-bank-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.bank-question-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px;display:grid;gap:10px;transition:.15s}.bank-question-card:hover{transform:translateY(-1px);box-shadow:0 12px 30px rgba(40,55,90,.07)}.bank-question-card.active-question{border-color:#cdd9ff;background:linear-gradient(180deg,#fff,#fbfcff)}.bank-card-top{display:flex;align-items:center;gap:9px}.bank-tags{display:flex;gap:6px}.bank-tags span{font-size:.66rem;font-weight:850;color:#53617a;background:#f0f3f8;padding:5px 7px;border-radius:8px}.status-dot{margin-left:auto;font-size:.65rem;font-weight:900;padding:5px 8px;border-radius:99px}.status-dot.live{background:#e8f8f2;color:#17684f}.status-dot.bank{background:#f1f3f6;color:#6b7280}.bank-question-card h2{font-size:1.03rem;line-height:1.45;margin:2px 0}.bank-question-card>p{color:var(--muted);font-size:.78rem;margin:0}.bank-actions{display:flex;gap:7px;align-items:center;margin-top:4px;flex-wrap:wrap}.text-btn{border:0;background:transparent;color:var(--primary);font-weight:800;cursor:pointer;padding:8px}.audio-file-chip{font-size:.75rem;color:#53617a;background:#f3f6ff;border-radius:10px;padding:8px 10px;width:max-content}.bank-empty{grid-column:1/-1;background:#fff;border:1px solid var(--line);border-radius:20px}.compact{min-height:38px!important;padding:0 13px!important}
.setup-layout{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(320px,.65fr);gap:18px}.setup-card,.composition-card,.editor-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:24px;box-shadow:0 12px 30px rgba(50,65,95,.05)}.setup-card{display:grid;gap:18px}.setup-card h2,.editor-card h2{margin:0;font-size:1.05rem}.setup-card label,.editor-card label{display:grid;gap:7px}.composition-card{align-self:start;position:sticky;top:18px}.composition-total{display:flex;align-items:baseline;gap:8px;margin:8px 0 20px}.composition-total strong{font-size:3rem}.composition-total span{color:var(--muted)}.composition-types,.unit-composition{display:grid;gap:8px}.composition-types div,.unit-composition div{display:flex;justify-content:space-between;gap:12px;padding:10px 0;border-bottom:1px solid #edf0f4}.composition-types span,.unit-composition span{color:var(--muted);font-size:.82rem}.composition-card h3{font-size:.8rem;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);margin:22px 0 4px}.snapshot-note{margin-top:18px;padding:14px;border-radius:14px;background:#f4f7ff;border:1px solid #dfe6ff}.snapshot-note p{font-size:.78rem;color:var(--muted);line-height:1.45;margin:4px 0 0}.narrow-teacher{max-width:1050px}.question-editor{display:grid;gap:14px}.editor-grid.two{display:grid;grid-template-columns:180px 1fr;gap:12px}.toggle-row{display:grid!important;grid-template-columns:auto 1fr;align-items:start;gap:10px!important;background:#f7f9fc;padding:12px;border-radius:14px}.toggle-row input{width:auto!important;margin-top:3px}.toggle-row span{display:grid;text-transform:none!important;letter-spacing:0!important}.toggle-row strong{color:var(--ink)}.toggle-row small{color:var(--muted);margin-top:2px}.editor-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}.editor-heading p,.editor-help{color:var(--muted);font-size:.82rem;margin:5px 0 0}.dynamic-list{display:grid;gap:9px;margin-top:16px}.dynamic-row{display:grid;align-items:center;gap:9px;background:#f8fafc;border:1px solid #edf0f4;border-radius:14px;padding:9px}.choice-edit-row{grid-template-columns:auto 1fr auto}.choice-edit-row input[type=radio]{width:18px;height:18px}.pair-row{grid-template-columns:1fr auto 1fr auto}.remove-row{width:34px;height:34px;border:0;border-radius:10px;background:#fff;color:#8b93a3;font-size:1.2rem;cursor:pointer}.remove-row:hover{background:#fff0f0;color:#b42318}.current-audio{display:grid;gap:8px;padding:12px;background:#f7f9fc;border-radius:14px;margin:14px 0}.current-audio span{font-size:.7rem;color:var(--muted);font-weight:800}.current-audio audio{width:100%;max-width:520px}.editor-savebar{position:sticky;bottom:12px;display:flex;justify-content:flex-end;gap:10px;background:rgba(247,249,252,.88);backdrop-filter:blur(12px);border:1px solid var(--line);border-radius:18px;padding:12px;z-index:5}
@media(max-width:900px){.teacher-nav{align-items:flex-start;flex-wrap:wrap}.teacher-nav-links{order:3;width:100%;overflow:auto}.teacher-stat-grid{grid-template-columns:1fr}.type-counts{grid-template-columns:repeat(2,1fr)}.filter-card{grid-template-columns:1fr 1fr}.filter-search{grid-column:1/-1}.question-bank-grid{grid-template-columns:1fr}.setup-layout{grid-template-columns:1fr}.composition-card{position:static}.editor-grid.two{grid-template-columns:1fr}}
@media(max-width:620px){.teacher-brand strong{display:none}.teacher-nav-links a{flex:1;text-align:center;white-space:nowrap}.type-counts{width:100%;grid-template-columns:1fr 1fr}.filter-card{grid-template-columns:1fr}.filter-search{grid-column:auto}.bulk-toolbar{align-items:stretch;flex-wrap:wrap}.bulk-toolbar>span{margin-left:0;width:100%}.bank-card-top{align-items:flex-start;flex-wrap:wrap}.status-dot{margin-left:0}.pair-row{grid-template-columns:1fr}.pair-row>span{display:none}.editor-card{padding:18px}.editor-savebar{bottom:6px}.teacher-header h1{font-size:1.8rem}}

/* ===== Universal Assessment Studio additions ===== */
.subject-kicker{display:inline-flex;align-items:center;gap:.45rem;margin:.1rem 0 1rem;padding:.42rem .75rem;border-radius:999px;background:#eef3fb;color:#334a68;font-size:.82rem;font-weight:750}
.answer-field{display:block;margin-top:1rem}.answer-field input{width:100%;font-size:1.05rem;padding:1rem 1.05rem;border:1px solid var(--line,#dce3ec);border-radius:14px;background:#fff;color:inherit;outline:none}.answer-field input:focus{border-color:#8498b2;box-shadow:0 0 0 4px rgba(93,117,146,.10)}
.universal-filter{grid-template-columns:minmax(220px,1.5fr) repeat(4,minmax(145px,1fr)) auto}
.catalog-create-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;margin-bottom:1.4rem}.catalog-section{margin-top:1.5rem}.section-title-row{display:flex;align-items:end;justify-content:space-between;margin-bottom:.8rem}.section-title-row h2{margin:.1rem 0 0}.catalog-card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem}.catalog-item{background:rgba(255,255,255,.94);border:1px solid #e1e7ef;border-radius:18px;padding:1rem;box-shadow:0 10px 28px rgba(34,52,73,.05)}.catalog-item label{display:grid;gap:.35rem;margin:.7rem 0}.catalog-item label>span{font-size:.75rem;font-weight:750;color:#64748b}.catalog-item input,.catalog-item textarea,.catalog-item select{width:100%;padding:.72rem .8rem;border:1px solid #d9e1eb;border-radius:11px;background:#fff;font:inherit}.catalog-stats{display:flex;gap:.5rem;flex-wrap:wrap}.catalog-stats span{font-size:.72rem;font-weight:700;background:#f1f5f9;color:#526172;padding:.28rem .5rem;border-radius:999px}
.teacher-nav-links{flex-wrap:wrap}
@media(max-width:1100px){.universal-filter{grid-template-columns:repeat(2,minmax(0,1fr))}.catalog-card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:760px){.catalog-create-grid,.catalog-card-grid,.universal-filter{grid-template-columns:1fr}.teacher-nav-links{width:100%;overflow:auto;flex-wrap:nowrap;padding-bottom:.25rem}.teacher-nav-links a{white-space:nowrap}}

/* ===== Responsive UI refinement + student roster ===== */
:root{
  --field-h:50px;
  --field-radius:13px;
  --field-pad-x:15px;
}

/* Consistent, breathable form controls */
input[type="text"],input[type="search"],input[type="number"],input[type="password"],input[type="email"],input[type="file"],
textarea,select{
  width:100%;max-width:100%;min-width:0;
  border:1px solid var(--line);background:#fff;color:var(--ink);
  border-radius:var(--field-radius);font:inherit;line-height:1.35;
  outline:none;transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
input[type="text"],input[type="search"],input[type="number"],input[type="password"],input[type="email"],select{
  min-height:var(--field-h);padding:11px var(--field-pad-x);
}
input[type="file"]{min-height:var(--field-h);padding:10px 12px}
textarea{padding:13px var(--field-pad-x);line-height:1.55;resize:vertical;min-height:92px}
input::placeholder,textarea::placeholder{color:#9aa5b5}
input:focus,textarea:focus,select:focus{
  border-color:#91a5e8;box-shadow:0 0 0 4px rgba(49,87,213,.09);background:#fff;
}
input:disabled,textarea:disabled,select:disabled{background:#f3f5f8;color:#8b95a5;cursor:not-allowed}
label{min-width:0}
label>span{line-height:1.3}
label>span small{font-weight:650;color:#8a95a6;text-transform:none;letter-spacing:0;margin-left:4px}
.field-help,.form-hint{display:block;color:var(--muted);font-size:.78rem;line-height:1.45;margin-top:2px}
.form-hint.warning{color:#8d5b18;background:#fff8e8;border:1px solid #f3e0b7;border-radius:12px;padding:10px 12px}
.form-grid{display:grid;gap:14px;min-width:0}.form-grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.form-grid.two-wide{grid-template-columns:repeat(2,minmax(0,1fr))}
.form-grid label,.roster-create-card>label,.student-edit-form>label{display:grid;gap:7px;font-size:.82rem;font-weight:760;color:#53617a}

/* Teacher navigation: desktop sidebar + app-style mobile */
.teacher-nav{
  position:relative;display:flex;align-items:center;gap:14px;justify-content:space-between;
  margin-bottom:28px;padding:8px 0 16px;border-bottom:1px solid rgba(216,224,235,.9);
}
.teacher-nav-main{display:flex;align-items:center;justify-content:space-between;gap:12px;min-width:max-content}
.teacher-menu-toggle{
  min-height:42px;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--ink);
  display:inline-flex;align-items:center;gap:9px;padding:0 12px;font-weight:800;font-size:.78rem;cursor:pointer;
}
.menu-lines{width:17px;display:grid;gap:3px}.menu-lines i{height:2px;border-radius:2px;background:currentColor;display:block;transition:.18s}
.teacher-nav.nav-open .menu-lines i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.teacher-nav.nav-open .menu-lines i:nth-child(2){opacity:0}
.teacher-nav.nav-open .menu-lines i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.teacher-nav-panel{display:flex;align-items:center;justify-content:flex-end;gap:12px;min-width:0;flex:1}
.teacher-nav.nav-collapsed .teacher-nav-panel{display:none}
.teacher-nav-links{display:flex;align-items:center;gap:5px;min-width:0;padding:4px;background:#eef2f7;border-radius:14px}
.teacher-nav-links a{display:inline-flex;align-items:center;gap:7px;white-space:nowrap}
.nav-icon{width:20px;height:20px;border-radius:7px;display:grid;place-items:center;font-size:.72rem;background:rgba(255,255,255,.58)}
.teacher-nav-links a.active .nav-icon{background:var(--soft);color:var(--primary)}
.teacher-logout{margin:0;flex:0 0 auto}.mobile-app-nav{display:none}
.teacher-nav-section,.teacher-nav-actions{display:none}

.teacher-shell,.teacher-shell>*{min-width:0}.teacher-header>*,.setup-layout>*,.catalog-create-grid>*,.catalog-card-grid>*,.question-bank-grid>*{min-width:0}
.teacher-header{margin-bottom:26px}.teacher-header>div:first-child{max-width:760px}.teacher-header p:last-child{line-height:1.55;margin-bottom:0}
.header-inline-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
.teacher-actions{max-width:100%}
.teacher-stat-grid{grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:14px}.teacher-stat-grid article{min-height:112px;padding:20px}
.editor-card,.setup-card,.composition-card,.catalog-item,.filter-card{overflow:hidden}
.editor-card,.setup-card{gap:17px}
.editor-card label,.setup-card label,.catalog-item label,.filter-card label{min-width:0}

@media(min-width:1101px){
  .teacher-shell{
    width:min(1600px,calc(100% - 56px));
    margin:0 auto;
    padding:24px 0 40px 340px;
    position:relative;
  }
  body.teacher-nav-collapsed .teacher-shell{padding-left:148px}
  .teacher-nav{
    position:fixed;
    top:24px;
    left:28px;
    width:284px;
    height:calc(100dvh - 48px);
    margin:0;
    padding:16px;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:16px;
    border:1px solid rgba(215,224,236,.92);
    border-radius:28px;
    background:rgba(255,255,255,.92);
    backdrop-filter:blur(20px);
    box-shadow:0 24px 60px rgba(36,49,78,.12);
    z-index:45;
  }
  .teacher-nav-main{width:100%}
  .teacher-brand{display:flex;align-items:center;gap:10px;min-width:0}
  .teacher-brand strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .teacher-menu-toggle{flex:0 0 auto}
  .teacher-nav-panel{
    display:flex;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:14px;
    min-width:0;
    flex:1;
    overflow:auto;
    padding-right:2px;
  }
  .teacher-nav-section{display:grid;gap:10px}
  .teacher-nav-label{
    margin:0;
    font-size:.67rem;
    text-transform:uppercase;
    letter-spacing:.18em;
    color:#718096;
    font-weight:850;
  }
  .teacher-nav-links{display:grid;gap:6px;padding:0;background:transparent;border-radius:0}
  .teacher-nav-links a{
    display:flex;align-items:center;gap:11px;
    min-width:0;
    padding:11px 12px;
    border:1px solid transparent;
    border-radius:15px;
    background:#f7f9fc;
    color:var(--ink);
  }
  .teacher-nav-links a:hover{background:#eef3fb;border-color:#dde5f0}
  .teacher-nav-links a.active{
    background:#fff;
    border-color:#dce4ef;
    box-shadow:0 10px 24px rgba(35,51,82,.09);
  }
  .nav-icon{background:#e9eef7;color:#55657c}
  .teacher-nav-links a.active .nav-icon{background:var(--soft);color:var(--primary-2)}
  .teacher-nav-account{padding-top:2px;border-top:1px solid #edf0f4}
  .teacher-nav-actions{display:grid;gap:8px}
  .teacher-nav-actions .ghost-btn,.teacher-logout .ghost-btn{width:100%}
  .teacher-session-chip{
    width:100%;
    padding:12px;
    border:1px solid #dbe3ef;
    background:#fff;
    border-radius:18px;
    box-shadow:0 10px 24px rgba(39,54,82,.05);
  }
  .teacher-session-chip strong{max-width:170px}
  .teacher-nav.nav-collapsed{
    width:94px;
    padding:14px 10px;
    align-items:center;
  }
  .teacher-nav.nav-collapsed .teacher-nav-main{justify-content:center;width:100%}
  .teacher-nav.nav-collapsed .teacher-brand strong,
  .teacher-nav.nav-collapsed .menu-toggle-label,
  .teacher-nav.nav-collapsed .teacher-nav-panel,
  .teacher-nav.nav-collapsed .teacher-nav-label,
  .teacher-nav.nav-collapsed .teacher-session-chip,
  .teacher-nav.nav-collapsed .teacher-nav-actions{display:none}
  .teacher-nav.nav-collapsed .teacher-brand{justify-content:center;width:100%}
  .teacher-nav.nav-collapsed .teacher-menu-toggle{width:44px;padding:0;justify-content:center}
}

/* Students & sections */
.roster-create-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(300px,.65fr);gap:18px;margin-bottom:30px}
.roster-create-card{align-content:start}.card-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:14px}.card-heading h2{margin:0}.soft-badge{display:inline-flex;padding:7px 10px;border-radius:999px;background:var(--soft);color:var(--primary-2);font-size:.7rem;font-weight:850;white-space:nowrap}
.section-manager,.roster-list-section{margin-top:28px}.section-title-row{gap:14px}.section-title-row h2{font-size:1.25rem}.result-count{font-size:.76rem;font-weight:800;color:var(--muted);background:#eef2f7;border-radius:999px;padding:7px 11px}
.section-chip-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px}
.section-chip-card{background:#fff;border:1px solid var(--line);border-radius:17px;overflow:hidden;box-shadow:0 8px 24px rgba(44,60,90,.04)}
.section-chip-card summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:10px;padding:16px 17px}.section-chip-card summary::-webkit-details-marker{display:none}.section-chip-card summary>span:first-child{display:grid;gap:3px}.section-chip-card summary small{color:var(--muted);font-size:.72rem}.summary-chevron{color:#8994a5;transition:.18s}.section-chip-card[open] .summary-chevron{transform:rotate(180deg)}
.section-chip-card form{display:grid;gap:12px;border-top:1px solid #edf0f4;padding:16px}.section-chip-card label{display:grid;gap:6px;font-size:.78rem;font-weight:760;color:#64748b}
.roster-filter{grid-template-columns:minmax(220px,1.7fr) minmax(150px,.7fr) minmax(140px,.65fr) auto;margin-top:12px}
.student-card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.student-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px;box-shadow:0 10px 28px rgba(40,55,90,.045);min-width:0}.student-card.inactive{opacity:.72;background:#fafbfc}
.student-card-top{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:11px}.roster-avatar{width:42px;height:42px;border-radius:13px;background:#eef2ff;color:var(--primary-2);display:grid;place-items:center;font-weight:900}.student-card-name{min-width:0}.student-card-name h3{font-size:.98rem;margin:0 0 4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.student-card-name p{font-size:.75rem;color:var(--muted);margin:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.student-note{color:var(--muted);font-size:.78rem;line-height:1.45;padding:10px 12px;background:#f8fafc;border-radius:11px;margin:13px 0 0}
.student-edit-details{margin-top:14px;border-top:1px solid #edf0f4;padding-top:12px}.student-edit-details summary{list-style:none;cursor:pointer;color:var(--primary);font-size:.78rem;font-weight:850;display:flex;justify-content:space-between}.student-edit-details summary::-webkit-details-marker{display:none}.student-edit-form{display:grid;gap:12px;margin-top:14px}.compact-toggle{padding:10px!important}.inline-actions{display:flex;gap:8px;flex-wrap:wrap}

/* Keep tables usable without breaking the page width */
.table-card{max-width:100%}.table-scroll{max-width:100%;overscroll-behavior-inline:contain;-webkit-overflow-scrolling:touch}.table-scroll table{min-width:980px}

@media(max-width:1100px){
  .student-card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .roster-create-grid{grid-template-columns:1fr 1fr}
  .teacher-nav-panel{gap:7px}.teacher-nav-links a{padding:9px 9px}.teacher-nav-links a span:last-child{font-size:.75rem}
}

@media(max-width:900px){
  .teacher-shell{width:min(100% - 28px,1280px);padding-top:20px}
  .roster-create-grid{grid-template-columns:1fr}.form-grid.two-wide{grid-template-columns:1fr 1fr}
  .roster-filter{grid-template-columns:1fr 1fr}.roster-filter .filter-search{grid-column:1/-1}.roster-filter button{align-self:end}
  .teacher-header{gap:16px}.teacher-actions{width:100%}.teacher-actions .primary-btn,.teacher-actions .ghost-btn{flex:1 1 auto}
}

@media(max-width:760px){
  .teacher-shell{width:min(100% - 22px,1280px);padding-top:12px;padding-bottom:92px}
  .teacher-nav{display:block;margin-bottom:22px;padding:6px 0 12px}
  .teacher-nav-main{width:100%}.teacher-brand strong{display:inline}.teacher-menu-toggle{display:inline-flex}
  .teacher-nav-panel{display:none!important;position:absolute;top:58px;left:0;right:0;z-index:50;background:rgba(255,255,255,.98);backdrop-filter:blur(18px);border:1px solid var(--line);border-radius:18px;padding:10px;box-shadow:0 20px 50px rgba(31,43,70,.16)}
  .teacher-nav.nav-open .teacher-nav-panel{display:grid!important;gap:10px}
  .teacher-nav-links{display:grid;width:100%;background:transparent;padding:0;gap:4px}.teacher-nav-links a{width:100%;padding:11px 12px;border-radius:11px}.teacher-nav-links a.active{background:var(--soft);box-shadow:none}
  .teacher-logout .ghost-btn{width:100%}
  .mobile-app-nav{position:fixed;display:grid;grid-template-columns:repeat(5,1fr);left:10px;right:10px;bottom:max(8px,env(safe-area-inset-bottom));z-index:55;background:rgba(255,255,255,.96);backdrop-filter:blur(18px);border:1px solid rgba(215,223,235,.95);border-radius:19px;padding:6px;box-shadow:0 16px 40px rgba(27,39,68,.18)}
  .mobile-app-nav a{min-width:0;display:grid;place-items:center;gap:2px;padding:5px 2px;border-radius:13px;text-decoration:none;color:#7a8597}.mobile-app-nav a>span{font-size:1rem;line-height:1}.mobile-app-nav small{font-size:.58rem;font-weight:800;white-space:nowrap}.mobile-app-nav a.active{background:var(--soft);color:var(--primary-2)}
  .teacher-header h1{font-size:1.7rem}.teacher-header p:last-child{font-size:.88rem}.teacher-actions{display:grid;grid-template-columns:1fr 1fr}.teacher-actions>*{width:100%}
  .teacher-stat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.teacher-stat-grid article{min-height:104px;padding:16px}.teacher-stat-grid strong{font-size:1.5rem}
  .student-card-grid{grid-template-columns:1fr}.form-grid.two,.form-grid.two-wide{grid-template-columns:1fr}.roster-filter{grid-template-columns:1fr}.roster-filter .filter-search{grid-column:auto}.roster-filter button{width:100%}
  .catalog-create-grid,.catalog-card-grid,.universal-filter,.setup-layout{grid-template-columns:1fr}
  .editor-card,.setup-card,.composition-card{padding:19px}.editor-savebar{left:0;right:0;display:grid;grid-template-columns:1fr 1fr}.editor-savebar>*{width:100%}
  .filter-card{padding:13px;gap:12px}.bulk-toolbar select{flex:1 1 180px}
  .question-bank-grid{gap:11px}.bank-question-card{padding:16px}.bank-actions{display:grid;grid-template-columns:1fr 1fr}.bank-actions>*{width:100%}.bank-actions .text-btn{grid-column:1/-1}
  .type-counts{grid-template-columns:repeat(2,minmax(0,1fr))}.type-counts span{min-width:0}
  .section-chip-grid{grid-template-columns:1fr}
  input[type="text"],input[type="search"],input[type="number"],input[type="password"],input[type="email"],select,textarea{font-size:16px}
}

@media(max-width:480px){
  .teacher-shell{width:min(100% - 16px,1280px)}
  .teacher-brand>span{width:34px;height:34px}.teacher-brand strong{font-size:.88rem}.menu-toggle-label{display:none}.teacher-menu-toggle{width:42px;padding:0;justify-content:center}
  .teacher-stat-grid{grid-template-columns:1fr 1fr;gap:9px}.teacher-stat-grid article{padding:14px;border-radius:15px}.teacher-stat-grid span{font-size:.68rem}.teacher-stat-grid strong{font-size:1.35rem}.teacher-stat-grid small{font-size:.68rem}
  .teacher-actions{grid-template-columns:1fr}.roster-create-card{padding:17px}.student-card{padding:15px}.student-card-top{grid-template-columns:auto minmax(0,1fr)}.student-card-top .status-dot{grid-column:2;justify-self:start;margin-top:1px}
  .editor-card,.setup-card,.composition-card,.catalog-item{border-radius:18px;padding:16px}.editor-grid.two{grid-template-columns:1fr}
  .question-card{padding:22px 17px}.login-shell{padding:14px}.login-card{padding:26px 19px}.result-shell{padding:12px}.result-card{padding:20px 16px}
  .mobile-app-nav{left:7px;right:7px;border-radius:17px}.mobile-app-nav small{font-size:.55rem}
}

/* Student accounts & credentials */
.account-kicker,.profile-chip,.account-info-strip,.account-settings-card{display:flex;align-items:center;gap:12px;border:1px solid var(--line);background:#f8fafc;border-radius:16px;padding:14px 15px;color:var(--ink)}
.account-kicker{margin:24px 0 6px}.account-kicker>span,.account-info-strip>span,.account-settings-icon{width:36px;height:36px;display:grid;place-items:center;flex:0 0 auto;border-radius:11px;background:var(--soft);color:var(--primary);font-weight:900}
.account-kicker div,.profile-chip div,.account-info-strip div,.account-settings-card div{min-width:0;display:grid;gap:3px}.account-kicker small,.profile-chip small,.account-info-strip p,.account-settings-card p,.account-settings-card small{margin:0;color:var(--muted);font-size:.78rem;line-height:1.45}
.login-help{margin:10px 2px 0;color:var(--muted);font-size:.78rem;line-height:1.45}.password-card{max-width:580px}.profile-chip{margin:22px 0}.profile-chip>span{width:42px;height:42px;display:grid;place-items:center;border-radius:13px;background:var(--soft);color:var(--primary);font-weight:900}.standalone-action{margin-top:12px}.standalone-action .ghost-btn{width:100%}
.account-info-strip{margin:0 0 22px}.account-info-strip p{margin-top:2px}.account-settings-card{align-items:flex-start}.account-settings-card p{font-weight:800;color:var(--ink);margin:2px 0 3px}
.password-setup-box{border:1px solid var(--line);border-radius:16px;padding:14px;display:grid;gap:12px;min-width:0;background:#fbfcff}.password-setup-box legend{padding:0 8px;font-size:.78rem;font-weight:850;color:#53617a}.password-setup-box>label,.password-reset-form>label{display:grid;gap:7px;font-size:.82rem;font-weight:760;color:#53617a}
.password-mode-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.choice-tile{display:flex!important;align-items:flex-start;gap:9px!important;border:1px solid var(--line);border-radius:13px;padding:11px 12px;background:#fff;cursor:pointer;color:var(--ink)!important}.choice-tile input{width:17px;height:17px;min-height:0;margin:2px 0 0;flex:0 0 auto}.choice-tile span{display:grid;gap:3px;min-width:0}.choice-tile strong{font-size:.78rem;line-height:1.3}.choice-tile small{font-size:.68rem;line-height:1.35;color:var(--muted)}.choice-tile:has(input:checked){border-color:#9baded;background:#f5f7ff;box-shadow:0 0 0 3px rgba(49,87,213,.06)}
.field-muted{opacity:.58}.field-muted input{background:#f4f6f9}.credential-notice{margin:0 0 24px;padding:20px;border:1px solid #b8c7f4;border-radius:20px;background:linear-gradient(135deg,#f7f9ff,#eef3ff);box-shadow:0 12px 32px rgba(49,87,213,.08)}.credential-notice-head{display:flex;align-items:flex-start;justify-content:space-between;gap:18px}.credential-notice-head h2{margin:0 0 4px}.credential-notice-head p:last-child{margin:0;color:var(--muted);font-size:.82rem;line-height:1.45}.credential-lock{width:42px;height:42px;display:grid;place-items:center;border-radius:13px;background:#fff;color:var(--primary);font-weight:900}.credential-grid{display:grid;grid-template-columns:1.1fr 1.2fr .8fr;gap:10px;margin:16px 0}.credential-grid>div{min-width:0;background:#fff;border:1px solid rgba(190,202,231,.8);border-radius:13px;padding:11px 12px;display:grid;gap:4px}.credential-grid span{font-size:.67rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-weight:800}.credential-grid strong,.credential-grid code{font-size:.85rem;overflow-wrap:anywhere}.credential-grid code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--primary-2);font-weight:900}
.account-state{margin-top:12px;display:flex;justify-content:space-between;gap:8px;align-items:center;border-radius:11px;padding:8px 10px;font-size:.7rem;font-weight:850}.account-state.ready{background:#eef8f2;color:#257044}.account-state.pending{background:#fff5e8;color:#9a641d}.account-state small{font-size:.63rem;font-weight:720;color:inherit;opacity:.82;text-align:right}.password-reset-form{display:grid;gap:11px;margin-top:14px;border-top:1px dashed #dbe2ec;padding-top:14px}.subform-heading{display:grid;gap:3px}.subform-heading strong{font-size:.82rem}.subform-heading small{font-size:.69rem;line-height:1.4;color:var(--muted)}.inline-form{display:inline-flex;margin:0}

@media(max-width:760px){.password-mode-grid,.credential-grid{grid-template-columns:1fr}.credential-notice{padding:16px}.account-state{align-items:flex-start;flex-direction:column}.account-state small{text-align:left}}

/* ===== Modal editing, destructive actions & result filtering ===== */
.danger-btn,.danger-link{border:1px solid #efc7c7;background:#fff6f6;color:#ad3434;border-radius:12px;min-height:42px;padding:0 13px;display:inline-flex;align-items:center;justify-content:center;font:inherit;font-size:.78rem;font-weight:850;cursor:pointer;text-decoration:none}.danger-btn:hover,.danger-link:hover{background:#fdecec;border-color:#e7adad}.danger-link{background:transparent;min-height:38px}.card-action-row,.student-card-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.student-card-actions{margin-top:14px;padding-top:13px;border-top:1px solid #edf0f4}.student-card-actions form,.card-action-row form{margin:0}.section-summary-card{padding:16px 17px;display:grid;gap:13px}.section-summary-card>div:first-child{display:grid;gap:4px}.section-summary-card small{color:var(--muted);font-size:.72rem}.section-summary-card p{margin:4px 0 0;color:var(--muted);font-size:.75rem;line-height:1.45}.catalog-summary-card{display:flex;flex-direction:column;gap:13px;min-height:180px}.catalog-item-content{flex:1;min-width:0}.catalog-item-content h3{margin:0;font-size:1rem}.catalog-item-content p{margin:7px 0 0;color:var(--muted);font-size:.78rem;line-height:1.5;overflow-wrap:anywhere}

.app-modal{width:min(640px,calc(100vw - 32px));max-height:min(88vh,820px);padding:0;border:1px solid var(--line);border-radius:24px;background:#fff;color:var(--ink);box-shadow:0 30px 90px rgba(17,27,49,.25);overflow:hidden}.app-modal::backdrop{background:rgba(20,29,48,.52);backdrop-filter:blur(7px)}.modal-form{display:grid;max-height:min(88vh,820px);min-width:0}.modal-header{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;padding:22px 24px 17px;border-bottom:1px solid #edf0f4}.modal-header h2{margin:0;font-size:1.3rem}.modal-subtitle{margin:5px 0 0;color:var(--muted);font-size:.78rem;overflow-wrap:anywhere}.modal-close{width:38px;height:38px;flex:0 0 auto;border:1px solid var(--line);border-radius:12px;background:#f8fafc;color:#64748b;font-size:1.35rem;line-height:1;cursor:pointer}.modal-close:hover{background:#eef2f7;color:var(--ink)}.modal-body{padding:21px 24px;display:grid;gap:15px;overflow:auto;min-height:0}.modal-body>label,.modal-form>label{display:grid;gap:7px;font-size:.82rem;font-weight:760;color:#53617a}.modal-actions{display:flex;justify-content:flex-end;gap:10px;padding:15px 24px 20px;border-top:1px solid #edf0f4;background:#fbfcfe}.password-reset-form-modal{margin:0;border:0;padding:0}

.result-filter-section{margin:4px 0 22px}.filter-heading-row{align-items:center}.filter-heading-row small{color:var(--muted);font-size:.75rem}.result-filter-grid{display:grid;grid-template-columns:minmax(220px,1.5fr) repeat(3,minmax(150px,.8fr));gap:12px;padding:16px}.result-filter-grid label{display:grid;gap:6px;font-size:.76rem;font-weight:800;color:#607087}.result-filter-grid .filter-search-wide{grid-column:span 2}.filter-actions{display:flex;align-items:end;gap:8px;grid-column:span 2}.filter-actions>*{flex:1}.table-card .empty-state .ghost-btn{margin-top:12px}

@media(max-width:1100px){.result-filter-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.result-filter-grid .filter-search-wide{grid-column:span 2}.filter-actions{grid-column:span 1}}
@media(max-width:760px){.result-filter-grid{grid-template-columns:1fr 1fr}.result-filter-grid .filter-search-wide{grid-column:1/-1}.filter-actions{grid-column:1/-1}.student-card-actions{display:grid;grid-template-columns:1fr 1fr}.student-card-actions>*{width:100%}.student-card-actions form:last-child{grid-column:1/-1}.student-card-actions button,.student-card-actions .danger-btn{width:100%}.card-action-row{display:grid;grid-template-columns:1fr 1fr}.card-action-row>*{width:100%}.card-action-row button,.card-action-row .danger-btn{width:100%}.app-modal{width:min(680px,calc(100vw - 20px));max-height:92vh;border-radius:20px}.modal-form{max-height:92vh}.modal-header{padding:18px 18px 14px}.modal-body{padding:18px}.modal-actions{padding:13px 18px max(16px,env(safe-area-inset-bottom));display:grid;grid-template-columns:1fr 1fr}.modal-actions>*{width:100%}.filter-heading-row{align-items:flex-start;flex-direction:column}}
@media(max-width:480px){.result-filter-grid{grid-template-columns:1fr}.result-filter-grid .filter-search-wide,.filter-actions{grid-column:auto}.filter-actions{display:grid;grid-template-columns:1fr}.app-modal{width:calc(100vw - 12px);border-radius:18px}.modal-header h2{font-size:1.15rem}.modal-body{padding:15px}.modal-actions{grid-template-columns:1fr}.student-card-actions,.card-action-row{grid-template-columns:1fr}.student-card-actions form:last-child{grid-column:auto}}

/* ===== UX polish: lightweight roster creation, dismissible notices, viewport-safe modals ===== */
.roster-header-actions{display:flex;align-items:center;justify-content:flex-end;gap:9px;flex-wrap:wrap}
.roster-header-actions .primary-btn,.roster-header-actions .ghost-btn{min-height:44px}

.toast-stack{display:grid;gap:10px;width:min(390px,calc(100vw - 28px));z-index:80}
.toast{display:flex;align-items:flex-start;gap:12px;min-width:0;padding:13px 12px 13px 15px;transition:opacity .2s ease,transform .2s ease;animation:toast-in .2s ease both}
.toast.success{border-color:#c5e7d8;color:#216c50}
.toast-message{flex:1;min-width:0;line-height:1.4;overflow-wrap:anywhere}
.toast-close,.notice-close{width:32px;height:32px;min-width:32px;border:0;border-radius:10px;background:rgba(100,116,139,.09);color:#64748b;display:grid;place-items:center;font-size:1.15rem;line-height:1;cursor:pointer}
.toast-close:hover,.notice-close:hover{background:rgba(100,116,139,.16);color:var(--ink)}
.toast.is-leaving,.credential-notice.is-leaving{opacity:0;transform:translateY(-8px);pointer-events:none}
@keyframes toast-in{from{opacity:0;transform:translateY(-7px)}to{opacity:1;transform:translateY(0)}}

.credential-notice{transition:opacity .2s ease,transform .2s ease}
.credential-notice-head .notice-close{background:#fff;border:1px solid rgba(190,202,231,.8)}

/* Dialog layout uses the real viewport height. Header/footer stay reachable; only body scrolls. */
.app-modal{
  width:min(660px,calc(100vw - 28px));
  max-width:calc(100vw - 28px);
  height:auto;
  max-height:calc(100dvh - 28px);
  margin:auto;
  overflow:hidden;
  overscroll-behavior:contain;
}
.app-modal.app-modal-wide{width:min(780px,calc(100vw - 28px))}
.modal-form{
  display:grid;
  grid-template-rows:auto minmax(0,1fr) auto;
  width:100%;
  max-width:100%;
  max-height:calc(100dvh - 28px);
  overflow:hidden;
}
.modal-header{min-width:0;position:relative;z-index:2;background:#fff}
.modal-header>div{min-width:0}
.modal-body{
  min-width:0;
  min-height:0;
  max-width:100%;
  overflow-x:hidden;
  overflow-y:auto;
  -webkit-overflow-scrolling:touch;
  scrollbar-gutter:stable;
  overscroll-behavior:contain;
}
.modal-body>*{min-width:0;max-width:100%}
.modal-body .form-grid{width:100%}
.modal-body input,.modal-body select,.modal-body textarea{max-width:100%;min-width:0}
.modal-body textarea{resize:vertical}
.modal-actions{position:relative;z-index:2;background:#fbfcfe;min-width:0}
.modal-field{display:grid;gap:7px;font-size:.82rem;font-weight:760;color:#53617a}

@media(max-width:900px){
  .teacher-header{align-items:flex-start}
  .roster-header-actions{justify-content:flex-start}
}
@media(max-width:700px){
  .modal-body .form-grid.two,.modal-body .form-grid.two-wide,.modal-two-col{grid-template-columns:1fr}
  .app-modal,.app-modal.app-modal-wide{width:calc(100vw - 18px);max-width:calc(100vw - 18px);max-height:calc(100dvh - 18px)}
  .modal-form{max-height:calc(100dvh - 18px)}
}
@media(max-width:520px){
  .roster-header-actions{display:grid;grid-template-columns:1fr 1fr;width:100%}
  .roster-header-actions>*{width:100%}
  .roster-header-actions a:last-child{grid-column:1/-1}
  .toast-stack{right:10px;top:10px;width:calc(100vw - 20px)}
  .app-modal,.app-modal.app-modal-wide{width:calc(100vw - 10px);max-width:calc(100vw - 10px);max-height:calc(100dvh - 10px);border-radius:18px}
  .modal-form{max-height:calc(100dvh - 10px)}
  .modal-header{padding:15px 14px 12px}
  .modal-body{padding:14px}
  .modal-actions{padding:11px 14px max(12px,env(safe-area-inset-bottom))}
}
@media(max-height:720px){
  .app-modal,.app-modal.app-modal-wide{max-height:calc(100dvh - 12px)}
  .modal-form{max-height:calc(100dvh - 12px)}
  .modal-header{padding-top:14px;padding-bottom:11px}
  .modal-body{padding-top:13px;padding-bottom:13px;gap:12px}
  .modal-actions{padding-top:10px;padding-bottom:10px}
  .password-setup-box{padding:11px;gap:9px}
}

/* Multi-exam architecture */
.student-home-shell{width:min(1180px,calc(100% - 34px));margin:0 auto;padding:26px 0 56px;position:relative;z-index:2}
.student-home-topbar{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:15px 18px;background:rgba(255,255,255,.9);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow)}
.student-home-topbar>div:first-child{display:flex;align-items:center;gap:12px;min-width:0}.student-home-topbar h1{font-size:1.15rem;margin:2px 0 0}.brand-mark.mini{width:42px;height:42px;min-width:42px;font-size:.85rem;margin:0}.student-account-actions{display:flex;gap:8px;align-items:center}.student-account-actions form{margin:0}
.student-profile-strip{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px 4px 6px}.student-profile-strip>div{display:grid;gap:2px}.student-profile-strip span{color:var(--muted);font-size:.84rem}.section-chip,.subject-chip{display:inline-flex!important;align-items:center;width:max-content;padding:6px 10px;border-radius:999px;background:var(--soft);color:var(--primary-2)!important;font-size:.74rem!important;font-weight:800}
.student-exam-intro{padding:28px 4px 10px}.student-exam-intro h2{margin:4px 0 6px;font-size:clamp(1.6rem,4vw,2.4rem)}.student-exam-intro p{margin:0;color:var(--muted)}
.student-exam-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;padding-top:10px}.student-exam-card{display:flex;flex-direction:column;min-width:0;background:#fff;border:1px solid var(--line);border-radius:22px;padding:20px;box-shadow:0 12px 32px rgba(40,54,80,.07)}.student-exam-card.completed{background:linear-gradient(180deg,#fff,#fbfffd)}.student-exam-card.progress{border-color:#cfd9f7}.student-exam-card-head{display:flex;align-items:center;justify-content:space-between;gap:10px}.student-exam-card-head>span{font-size:.75rem;font-weight:800;color:var(--primary-2)}.student-exam-card h3{font-size:1.2rem;margin:15px 0 7px}.student-exam-card>p{color:var(--muted);font-size:.9rem;line-height:1.55;min-height:44px}.exam-state{font-size:.69rem;padding:5px 9px;border-radius:999px}.exam-state.available{background:#eaf7f1;color:#287155}.exam-state.progress{background:#edf1ff;color:#4b62a8}.exam-state.completed{background:#eef2f5;color:#536174}.student-exam-meta{display:flex;align-items:center;gap:7px;margin-top:14px;color:var(--muted);font-size:.76rem}.random-version-note{margin-top:12px;padding:10px 11px;border-radius:12px;background:#f7f9fc;color:#59677d;font-size:.76rem;line-height:1.4}.student-exam-actions{margin-top:auto;padding-top:18px}.student-exam-actions form,.student-exam-actions .primary-btn,.student-exam-actions .ghost-btn{width:100%}.student-empty{grid-column:1/-1}
.student-protected-page{-webkit-user-select:none;user-select:none}.student-protected-page input,.student-protected-page textarea{-webkit-user-select:text;user-select:text}

.exam-manager-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.exam-manager-card{display:flex;flex-direction:column;min-width:0;padding:20px;background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:0 12px 30px rgba(35,50,78,.06)}.exam-manager-top{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}.exam-manager-top>div{display:flex;gap:7px;flex-wrap:wrap}.status-pill{display:inline-flex;padding:6px 9px;border-radius:999px;font-size:.7rem;font-weight:800}.status-pill.live{background:#eaf7f1;color:#247154}.status-pill.draft{background:#f2f4f7;color:#657084}.exam-card-count{font-size:.72rem;color:var(--muted)}.exam-manager-card h2{margin:16px 0 7px;font-size:1.18rem}.exam-manager-card>p{color:var(--muted);font-size:.87rem;line-height:1.5;min-height:42px}.exam-manager-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:15px 0 18px}.exam-manager-stats span{display:grid;gap:2px;padding:10px;border-radius:13px;background:#f8fafc;font-size:.67rem;color:var(--muted)}.exam-manager-stats strong{font-size:1rem;color:var(--ink)}.exam-manager-card>.primary-btn{margin-top:auto}
.exam-detail-section{margin:18px 0;padding:20px;background:#fff;border:1px solid var(--line);border-radius:20px}.version-card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:14px}.version-card{padding:16px;border:1px solid var(--line);border-radius:16px;background:#fbfcfe}.version-card>div:first-child{display:flex;justify-content:space-between;align-items:center;gap:10px;font-size:.75rem;color:var(--muted)}.version-badge{display:grid;place-items:center;min-width:34px;height:34px;border-radius:10px;background:var(--primary);color:#fff;font-weight:900}.version-card h3{margin:12px 0}.version-actions{display:flex;gap:8px;flex-wrap:wrap}.version-actions form{margin:0}.assignment-list{display:grid;gap:10px;margin-top:14px}.assignment-row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:14px 15px;border:1px solid var(--line);border-radius:14px}.assignment-row>div{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.assignment-row span,.assignment-row small{font-size:.76rem;color:var(--muted)}.exam-danger-zone{display:flex;justify-content:space-between;align-items:center;gap:16px;margin:18px 0;padding:18px;border:1px solid #f0cccc;background:#fffafa;border-radius:18px}.exam-danger-zone h2{margin:3px 0}.danger-btn{border:0;background:#c74b4b;color:#fff;padding:11px 15px;border-radius:12px;font-weight:800;cursor:pointer}
.selection-counter{display:grid;text-align:right}.selection-counter strong{font-size:2rem}.selection-counter span{font-size:.75rem;color:var(--muted)}.version-selection-toolbar,.sticky-save-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 14px;background:#fff;border:1px solid var(--line);border-radius:15px;margin:12px 0}.question-select-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.question-select-card{display:flex;gap:12px;align-items:flex-start;min-width:0;padding:15px;background:#fff;border:1px solid var(--line);border-radius:15px;cursor:pointer;transition:.16s ease}.question-select-card:hover,.question-select-card.selected{border-color:#aab9e8;background:#f7f9ff}.question-select-card>input{margin-top:4px;flex:0 0 auto}.question-select-card>div{min-width:0}.question-select-card strong{display:block;margin-top:8px;line-height:1.45;overflow-wrap:anywhere}.sticky-save-bar{position:sticky;bottom:86px;z-index:12;box-shadow:0 12px 35px rgba(31,46,77,.13)}

@media(max-width:1000px){.student-exam-grid,.exam-manager-grid,.version-card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:760px){.mobile-app-nav{grid-template-columns:repeat(6,1fr)}.student-home-shell{width:min(100% - 18px,760px);padding-top:10px}.student-home-topbar{align-items:flex-start}.student-account-actions{display:grid}.student-exam-grid,.exam-manager-grid,.version-card-grid,.question-select-grid{grid-template-columns:1fr}.exam-detail-section{padding:16px}.assignment-row{align-items:flex-start}.assignment-row>div{display:grid;gap:4px}.sticky-save-bar{bottom:78px}.student-exam-card>p{min-height:0}}
@media(max-width:520px){.student-home-topbar{display:grid}.student-account-actions{grid-template-columns:1fr 1fr;width:100%}.student-account-actions>*{width:100%}.student-profile-strip{align-items:flex-start}.exam-danger-zone{display:grid}.version-actions{display:grid}.version-actions>*{width:100%}.version-actions .primary-btn,.version-actions .ghost-btn{width:100%}.version-selection-toolbar{align-items:flex-start}.sticky-save-bar{padding:9px 10px}.sticky-save-bar .primary-btn{font-size:.75rem;padding:9px 10px}.mobile-app-nav small{font-size:.49rem}}

/* CSV imports + simplified version question selection */
.version-selection-toolbar-static{position:static!important;box-shadow:none!important;margin:14px 0 16px}
.selection-toolbar-left{display:flex;align-items:center;gap:14px;flex-wrap:wrap;min-width:0}.selection-toolbar-left>label{display:inline-flex;align-items:center;gap:7px;font-weight:800;font-size:.8rem}.selection-count-inline{display:inline-flex;align-items:baseline;gap:5px;padding:7px 10px;border-radius:999px;background:var(--soft);color:var(--primary-2);font-size:.75rem;font-weight:800}.selection-count-inline strong{font-size:.95rem}
.question-select-card.question-unavailable{cursor:not-allowed;opacity:.67;background:#fafafa}.question-select-card.question-unavailable:hover{border-color:var(--line);background:#fafafa}.warning-tag{background:#fff4dc!important;color:#94651c!important}.question-unavailable-note{display:block;margin-top:8px;color:#9a6c28;font-size:.72rem;line-height:1.45}
.import-template-row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:13px 14px;border:1px solid var(--line);border-radius:14px;background:#f8fafc}.import-template-row p{margin:0;color:var(--muted);font-size:.78rem;line-height:1.5;min-width:0}.import-template-row .ghost-btn{flex:0 0 auto}
.import-help-card,.import-summary-card{padding:13px 14px;border:1px solid #d9e1ec;border-radius:14px;background:#f8fafc;display:grid;gap:5px}.import-help-card strong,.import-summary-card strong{font-size:.8rem}.import-help-card p,.import-summary-card span{margin:0;color:var(--muted);font-size:.75rem;line-height:1.5}.import-summary-card{margin:0 0 18px;background:#f7fbf9;border-color:#cce4d6}.import-summary-card ul{margin:5px 0 0;padding-left:20px;color:#7b5a3a;font-size:.72rem;line-height:1.45}
.modal-body input[type="file"]{width:100%;min-height:50px;padding:8px 10px;border:1px dashed #bac5d6;border-radius:13px;background:#fbfcfe;color:var(--ink)}.modal-body input[type="file"]::file-selector-button{border:0;border-radius:9px;padding:9px 11px;margin-right:10px;background:var(--soft);color:var(--primary-2);font:inherit;font-size:.74rem;font-weight:800;cursor:pointer}
.header-inline-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:13px}
@media(max-width:760px){.version-selection-toolbar-static{align-items:stretch}.selection-toolbar-left{justify-content:space-between}.version-selection-toolbar-static>.primary-btn{width:100%}.import-template-row{align-items:stretch;flex-direction:column}.import-template-row .ghost-btn{width:100%}}
@media(max-width:520px){.selection-toolbar-left{display:grid;grid-template-columns:1fr}.selection-count-inline{width:max-content}.header-inline-actions{display:grid;grid-template-columns:1fr}.header-inline-actions>*{width:100%}}
.sticky-save-bar{display:none!important}
.audio-file-chip.audio-missing{background:#fff5e5;color:#95681f;border-color:#efd7ad}
.import-format-help{border:1px solid var(--line);border-radius:14px;background:#fff;overflow:hidden}.import-format-help summary{cursor:pointer;padding:12px 14px;font-size:.78rem;font-weight:850;color:var(--ink);background:#fbfcfe}.import-format-help>div{padding:4px 14px 12px;display:grid;gap:5px}.import-format-help p{margin:0;color:var(--muted);font-size:.73rem;line-height:1.48}.import-format-help strong{color:var(--ink)}
.result-actions{flex-wrap:wrap}

/* Final listening-source + version archive refinements */
.listening-source-picker{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:14px 0}.source-option{display:grid!important;grid-template-columns:auto 1fr;align-items:start;gap:10px!important;padding:14px;border:1px solid var(--line);border-radius:15px;background:#fbfcfe;cursor:pointer}.source-option:has(input:checked){border-color:var(--primary);box-shadow:0 0 0 3px rgba(77,91,211,.09);background:#f7f8ff}.source-option input{width:18px!important;height:18px!important;margin-top:2px}.source-option span{display:grid;gap:3px;text-transform:none!important;letter-spacing:0!important}.source-option small,.field-help,.section-help{color:var(--muted);font-size:.78rem;line-height:1.45}.tts-settings{margin:12px 0}.archived-version-section{background:#fafbfc}.archived-version-card{opacity:.82;background:#f6f7f9;border-style:dashed}.muted-version-badge{background:#8d95a5}.archived-version-card .version-actions{margin-top:8px}@media(max-width:760px){.listening-source-picker{grid-template-columns:1fr}}
\n\n/* ===== Multi-teacher + focused exam UX ===== */\n.teacher-session-chip{display:flex;align-items:center;gap:8px;min-width:0;padding:5px 8px;border:1px solid var(--line);background:#fff;border-radius:13px}.teacher-session-avatar{width:30px;height:30px;display:grid;place-items:center;border-radius:9px;background:#eef2ff;color:var(--primary-2);font-weight:900}.teacher-session-chip>span:nth-child(2){display:grid;min-width:0}.teacher-session-chip strong{font-size:.72rem;max-width:150px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.teacher-session-chip small{font-size:.62rem;color:var(--muted)}.teacher-session-chip>a{display:grid;place-items:center;width:30px;height:30px;border-radius:9px;text-decoration:none;color:var(--muted);background:#f7f9fc}.teacher-user-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.teacher-user-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px;box-shadow:0 10px 28px rgba(40,55,90,.045)}.teacher-user-card.inactive{opacity:.68}.teacher-user-head{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:10px}.teacher-user-avatar{width:42px;height:42px;display:grid;place-items:center;border-radius:13px;background:#eef2ff;color:var(--primary-2);font-weight:900}.teacher-user-head h2{font-size:1rem;margin:0 0 3px}.teacher-user-head p{font-size:.75rem;color:var(--muted);margin:0;overflow:hidden;text-overflow:ellipsis}.teacher-user-meta{display:grid;gap:6px;margin:15px 0;font-size:.75rem;color:var(--muted)}.teacher-user-actions{display:flex;gap:7px;flex-wrap:wrap}.teacher-user-actions form{margin:0}.teacher-password-card{width:min(560px,100%);margin:40px auto}\n.exam-layout{grid-template-columns:220px minmax(0,1fr);gap:28px}.exam-sidebar-minimal{display:grid;gap:12px}.exam-progress-mini,.security-mini{background:#fff;border:1px solid var(--line);border-radius:16px;padding:13px;box-shadow:0 8px 22px rgba(39,54,82,.04)}.exam-progress-top{display:flex;align-items:baseline;justify-content:space-between;gap:10px}.exam-progress-top>strong{font-size:1.35rem}.exam-progress-top span{font-size:.68rem;color:var(--muted)}.exam-progress-top b{color:var(--ink)}.progress-line{height:7px;margin-top:10px;border-radius:999px;background:#edf1f7;overflow:hidden}.progress-line i{display:block;width:var(--progress,0%);height:100%;border-radius:inherit;background:var(--primary);transition:width .2s ease}.section-nav-compact{display:grid;gap:6px}.section-nav-compact button{padding:9px 10px;border-radius:12px}.section-nav-compact button span:nth-child(2){display:flex;align-items:center;justify-content:space-between;gap:6px;min-width:0}.section-nav-compact strong{font-size:.72rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.section-nav-compact small{font-size:.65rem}.security-mini{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:9px}.security-mini>div{display:grid;gap:2px}.security-mini strong{font-size:.72rem}.security-mini small{font-size:.62rem;color:var(--muted);line-height:1.3}.icon-focus-btn{width:34px;min-height:34px;padding:0;border-radius:10px;font-size:1rem}.question-card{scroll-margin-top:18px}.exam-main{min-width:0}\n@media(max-width:1100px){.teacher-user-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}\n@media(max-width:900px){.exam-layout{grid-template-columns:1fr;gap:14px}.exam-sidebar-minimal{position:static;grid-template-columns:minmax(0,1fr) auto}.section-nav-compact{display:none}.security-mini{min-width:230px}.question-card{scroll-margin-top:12px}}\n@media(max-width:760px){.teacher-session-chip{display:none}.teacher-user-grid{grid-template-columns:1fr}}\n@media(max-width:620px){.exam-sidebar-minimal{grid-template-columns:1fr}.security-mini{min-width:0}.exam-progress-mini{padding:11px 12px}.security-mini{padding:10px 12px}.question-card{scroll-margin-top:8px}}\n
.security-mini .focus-mode-btn{background:#f3f6fb;color:var(--ink);border:1px solid var(--line)}.security-mini .focus-mode-btn:hover{background:#eaf0f8}.security-mini .focus-mode-btn.active{background:#e8f8f2;color:#11664d;border-color:#ccecdf}

/* 2026 UI refresh */
:root{
  --bg:#eef3fa;
  --card:rgba(255,255,255,.88);
  --ink:#172033;
  --muted:#61708a;
  --line:#d7dfec;
  --primary:#2747b8;
  --primary-2:#1f377f;
  --soft:#eaf0ff;
  --shadow:0 28px 70px rgba(26,39,66,.12);
}
html{font-feature-settings:"cv02","cv03","cv04","cv11";text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
body{min-height:100dvh;background:
  radial-gradient(circle at top left, rgba(66,96,211,.15), transparent 28%),
  radial-gradient(circle at top right, rgba(255,255,255,.95), transparent 28%),
  linear-gradient(180deg, #f8fbff 0%, #eef3fa 42%, #f7f9fc 100%);
}
body::before{content:"";position:fixed;inset:0;pointer-events:none;background-image:linear-gradient(rgba(24,35,58,.03) 1px, transparent 1px),linear-gradient(90deg, rgba(24,35,58,.03) 1px, transparent 1px);background-size:68px 68px;opacity:.5;mask-image:linear-gradient(180deg, rgba(0,0,0,.42), transparent 76%)}
h1,h2,h3,.login-card h1,.login-aside h2,.teacher-header h1,.student-exam-intro h2{letter-spacing:-.04em;text-wrap:balance}
.login-frame{width:min(1160px,100%);display:grid;grid-template-columns:minmax(0,1.04fr) minmax(320px,.96fr);gap:20px;align-items:stretch}
.login-card,.login-aside,.student-home-topbar,.student-exam-card,.exam-manager-card,.exam-detail-section,.assignment-row,.version-card,.teacher-user-card,.catalog-item,.bank-item,.result-card,.question-card,.setup-card,.notice-card,.app-modal,.import-help-card,.import-summary-card,.source-option{background:var(--card);border:1px solid rgba(215,223,236,.95);box-shadow:var(--shadow);backdrop-filter:blur(20px)}
.login-card{width:auto}
.login-aside{border-radius:32px;padding:34px 32px;display:grid;align-content:start;gap:18px}
.login-aside h2{margin:0;font-size:clamp(1.7rem,3vw,2.35rem);line-height:1.03}
.login-aside-lead{margin:0;color:var(--muted);line-height:1.7;max-width:44ch}
.feature-stack{display:grid;gap:12px}
.feature-panel{padding:16px 16px 15px;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.6)}
.feature-panel strong{display:block;margin-bottom:6px;font-size:.92rem;color:var(--ink)}
.feature-panel p{margin:0;color:var(--muted);font-size:.82rem;line-height:1.55}
.notice-card{border-radius:18px;padding:16px 16px 15px;background:linear-gradient(180deg, rgba(255,255,255,.92), rgba(241,246,255,.82));border:1px solid rgba(198,210,236,.95)}
.notice-card strong{font-size:.85rem}
.notice-card p{margin:6px 0 0;color:var(--muted);font-size:.82rem;line-height:1.55}
.teacher-link{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 16px;border-radius:14px;border:1px solid var(--line);background:rgba(255,255,255,.78);color:var(--ink);font-weight:800;text-decoration:none;width:max-content}
.teacher-link:hover{background:#fff}
.primary-btn,.submit-btn{background:linear-gradient(180deg,var(--primary) 0%,var(--primary-2) 100%);color:#fff;box-shadow:0 16px 30px rgba(39,71,184,.18)}
.ghost-btn{background:rgba(255,255,255,.78);border:1px solid var(--line);color:var(--ink);box-shadow:0 10px 24px rgba(38,54,82,.06)}
.primary-btn,.ghost-btn,.submit-btn,.teacher-link,button,input,select,textarea,.question-select-card,.version-actions .ghost-btn,.version-actions .primary-btn{transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,border-color .18s ease,opacity .18s ease}
.primary-btn:hover,.submit-btn:hover,.ghost-btn:hover,.teacher-link:hover,button:hover{transform:translateY(-1px)}
.primary-btn:focus-visible,.submit-btn:focus-visible,.ghost-btn:focus-visible,.teacher-link:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid rgba(39,71,184,.18);outline-offset:2px}
.login-form input,.modal-body input,.modal-body select,.modal-body textarea,.field input,.field select,.field textarea{background:rgba(255,255,255,.92);border-color:var(--line)}
.login-form input:focus,.modal-body input:focus,.modal-body select:focus,.modal-body textarea:focus,.field input:focus,.field select:focus,.field textarea:focus{border-color:rgba(39,71,184,.35);box-shadow:0 0 0 4px rgba(39,71,184,.08)}
.student-home-topbar,.student-exam-card,.exam-manager-card,.exam-detail-section,.assignment-row,.version-card,.teacher-user-card,.result-card,.question-card,.setup-card,.catalog-item,.bank-item,.import-help-card,.import-summary-card,.source-option{border-radius:24px}
.student-exam-card,.exam-manager-card,.teacher-user-card,.result-card,.question-card,.setup-card,.catalog-item,.bank-item,.version-card{box-shadow:0 18px 44px rgba(36,50,78,.08)}
.student-home-topbar{padding:18px 20px}
.student-exam-card h3,.exam-manager-card h2,.result-card h2,.question-card h3,.setup-card h2,.catalog-item h3,.bank-item h3{letter-spacing:-.03em}
.student-exam-intro,.teacher-header,.results-header,.catalog-header,.question-bank-header{padding-top:10px;padding-bottom:8px}
.student-exam-intro p,.exam-manager-card>p,.student-exam-card>p,.result-card p,.setup-card p,.catalog-item p,.bank-item p{color:var(--muted);line-height:1.6}
.student-exam-card.completed{background:linear-gradient(180deg,#ffffff 0%,#fafffd 100%)}
.student-exam-card.progress{border-color:#cfd9f7}
.exam-state.available{background:#eaf7f1;color:#287155}.exam-state.progress{background:#edf1ff;color:#4b62a8}.exam-state.completed{background:#eef2f5;color:#536174}
.exam-manager-stats span,.student-exam-meta,.random-version-note,.field-help,.section-help,.login-help{color:var(--muted)}
.student-exam-meta,.version-actions,.assignment-row>div,.teacher-user-actions,.header-inline-actions{gap:8px}
.danger-btn{box-shadow:0 12px 28px rgba(199,75,75,.16)}
@media(max-width:1080px){.login-frame{grid-template-columns:1fr}.login-aside{order:-1}.login-card{padding:40px 36px}}
@media(max-width:760px){.login-card,.login-aside{padding:28px 20px;border-radius:24px}.login-frame{gap:14px}}

.dashboard-hero{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(300px,.85fr);gap:18px;align-items:stretch;margin:18px 0 20px}
.dashboard-hero-main,.dashboard-hero-rail{border-radius:28px;padding:28px;background:linear-gradient(180deg, rgba(255,255,255,.94) 0%, rgba(247,250,255,.88) 100%);border:1px solid rgba(215,223,236,.95);box-shadow:var(--shadow);backdrop-filter:blur(18px)}
.dashboard-hero-main{display:grid;align-content:start;gap:16px}
.dashboard-hero-main h2{margin:0;font-size:clamp(1.9rem,3.8vw,3rem);line-height:1.02;max-width:14ch}
.dashboard-lead{margin:0;max-width:58ch;color:var(--muted);line-height:1.75}
.dashboard-metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.dashboard-metrics article{padding:15px 16px 14px;border-radius:18px;background:rgba(255,255,255,.82);border:1px solid var(--line);display:grid;gap:4px}
.dashboard-metrics span{font-size:.72rem;font-weight:850;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}
.dashboard-metrics strong{font-size:1.7rem;line-height:1;color:var(--ink);font-variant-numeric:tabular-nums}
.dashboard-metrics small{color:var(--muted);font-size:.76rem;line-height:1.45}
.dashboard-metrics-wide{grid-template-columns:repeat(4,minmax(0,1fr))}
.dashboard-hero-rail{display:grid;gap:12px;align-content:start;background:linear-gradient(180deg, rgba(240,246,255,.96) 0%, rgba(255,255,255,.9) 100%)}
.dashboard-rail-card{padding:18px 18px 17px;border-radius:20px;background:rgba(255,255,255,.92);border:1px solid var(--line);display:grid;gap:8px}
.dashboard-rail-card strong{font-size:1rem;line-height:1.2}
.dashboard-rail-card p{margin:0;color:var(--muted);line-height:1.55;font-size:.86rem}
.dashboard-rail-card-muted{background:rgba(248,250,255,.9)}
.dashboard-rail-chip{display:inline-flex;width:max-content;align-items:center;padding:6px 10px;border-radius:999px;background:var(--soft);color:var(--primary-2);font-size:.72rem;font-weight:850}
.dashboard-rail-actions{display:flex;gap:8px;flex-wrap:wrap;padding-top:4px}
.dashboard-header{align-items:flex-end;gap:18px}
.dashboard-header p:last-child{max-width:70ch;color:var(--muted);line-height:1.6}
.dashboard-header-actions{display:flex;flex-wrap:wrap;justify-content:flex-end}
.dashboard-insight-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.dashboard-insight-card{padding:16px 16px 15px;border-radius:20px;background:rgba(255,255,255,.88);border:1px solid var(--line);box-shadow:0 10px 28px rgba(33,48,76,.06);display:grid;gap:4px}
.dashboard-insight-card span{font-size:.7rem;text-transform:uppercase;letter-spacing:.08em;font-weight:850;color:var(--muted)}
.dashboard-insight-card strong{font-size:1.6rem;line-height:1;color:var(--ink);font-variant-numeric:tabular-nums}
.dashboard-insight-card small{color:var(--muted);font-size:.75rem;line-height:1.35}
.dashboard-progress-card{padding:20px 22px;border-radius:26px;background:linear-gradient(180deg, rgba(255,255,255,.94) 0%, rgba(247,250,255,.9) 100%);border:1px solid rgba(215,223,236,.95);box-shadow:var(--shadow)}
.dashboard-progress-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:14px}
.dashboard-progress-head h2{margin:3px 0 0;font-size:1.15rem}
.dashboard-progress-value{display:inline-flex;align-items:center;padding:7px 10px;border-radius:999px;background:var(--soft);color:var(--primary-2);font-size:.78rem;font-weight:850}
.dashboard-progress-bars{display:grid;gap:12px}
.progress-line{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:12px}
.progress-line span{font-size:.78rem;font-weight:850;color:var(--ink)}
.progress-line div{height:10px;border-radius:999px;background:#e8edf6;overflow:hidden;box-shadow:inset 0 1px 2px rgba(23,32,51,.06)}
.progress-line i{display:block;height:100%;width:0;border-radius:inherit;background:linear-gradient(90deg,var(--primary),#5f74e6)}
.progress-line i.warn{background:linear-gradient(90deg,#ca8b29,#e7b45a)}
.progress-line i.alert{background:linear-gradient(90deg,#d45555,#ef7777)}
.progress-line i.success{background:linear-gradient(90deg,#2b8a62,#5bb58c)}
.progress-line small{font-size:.76rem;font-weight:850;color:var(--muted);font-variant-numeric:tabular-nums}
.student-insight-grid .dashboard-insight-card strong{font-size:1.4rem}
.student-progress-card{margin-top:2px}
.teacher-dashboard-hero .dashboard-metrics article:last-child,.student-dashboard-hero .dashboard-metrics article:last-child{background:linear-gradient(180deg, rgba(239,244,255,.95), rgba(255,255,255,.92))}
.student-dashboard-hero .dashboard-hero-main h2{max-width:16ch}
.teacher-dashboard-hero .dashboard-hero-main h2{max-width:17ch}
.teacher-dashboard-hero .dashboard-hero-rail{background:linear-gradient(180deg, rgba(245,248,255,.98) 0%, rgba(255,255,255,.9) 100%)}
.student-dashboard-hero .dashboard-metrics{grid-template-columns:repeat(3,minmax(0,1fr))}
.teacher-dashboard-hero .dashboard-metrics{grid-template-columns:repeat(4,minmax(0,1fr))}
.teacher-dashboard-hero .dashboard-hero-main,.student-dashboard-hero .dashboard-hero-main{min-height:100%}
.teacher-dashboard-hero .dashboard-hero-rail,.student-dashboard-hero .dashboard-hero-rail{min-height:100%}
@media(max-width:1080px){.dashboard-hero{grid-template-columns:1fr}.teacher-dashboard-hero .dashboard-metrics,.dashboard-metrics-wide,.dashboard-insight-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:760px){.dashboard-hero{grid-template-columns:1fr}.dashboard-hero-main,.dashboard-hero-rail,.dashboard-progress-card{padding:22px;border-radius:24px}.dashboard-metrics,.dashboard-metrics-wide,.dashboard-insight-grid{grid-template-columns:1fr 1fr}.dashboard-hero-main h2{max-width:none}.dashboard-rail-actions .primary-btn,.dashboard-rail-actions .ghost-btn{flex:1 1 0}.dashboard-progress-head{align-items:flex-start;flex-direction:column}}
@media(max-width:520px){.dashboard-metrics,.dashboard-metrics-wide,.dashboard-insight-grid{grid-template-columns:1fr}.dashboard-rail-actions{display:grid}.dashboard-rail-actions>*{width:100%}.progress-line{grid-template-columns:1fr}.progress-line div{order:2}.progress-line small{order:3}}

.teacher-nav{position:sticky;top:14px;z-index:30;display:grid;gap:14px;padding:14px;border:1px solid rgba(215,223,236,.95);border-radius:26px;background:rgba(255,255,255,.72);backdrop-filter:blur(20px);box-shadow:0 24px 70px rgba(26,39,66,.09)}
.teacher-nav-main{display:flex;align-items:center;justify-content:space-between;gap:12px;min-width:0}
.teacher-workspace-chip{display:inline-flex;align-items:center;gap:8px;padding:7px 10px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.76);color:var(--muted);font-size:.72rem;font-weight:850;white-space:nowrap}
.workspace-dot{width:8px;height:8px;border-radius:50%;background:var(--primary)}
.teacher-nav-panel{display:grid;gap:14px;min-width:0}
.teacher-nav-intro{display:grid;gap:6px;padding:4px 2px 0}
.teacher-nav-intro strong{color:var(--ink);font-size:.88rem;line-height:1.45;max-width:28ch}
.teacher-nav-label{margin:0;text-transform:uppercase;letter-spacing:.08em;font-size:.68rem;font-weight:900;color:var(--muted)}
.teacher-nav-section{display:grid;gap:10px}
.teacher-nav-links{display:grid;gap:8px;padding:0;background:transparent;border-radius:0}
.teacher-nav-link{display:grid;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:12px;padding:12px 12px 12px 11px;border:1px solid transparent;border-radius:18px;background:rgba(255,255,255,.48);color:var(--ink);text-decoration:none;box-shadow:0 6px 18px rgba(29,42,67,.04)}
.teacher-nav-link:hover{background:#fff;border-color:var(--line);transform:translateY(-1px)}
.teacher-nav-link.active,.teacher-nav-link[aria-current="page"]{background:linear-gradient(180deg,#fff 0%,#f4f7ff 100%);border-color:#cfd8ef;box-shadow:0 14px 30px rgba(43,58,92,.08)}
.teacher-nav-link .nav-icon{width:32px;height:32px;display:grid;place-items:center;border-radius:11px;background:var(--soft);color:var(--primary-2);font-size:.9rem;font-weight:900}
.teacher-nav-link.active .nav-icon,.teacher-nav-link[aria-current="page"] .nav-icon{background:var(--primary);color:#fff}
.nav-link-copy{display:grid;min-width:0;gap:2px}
.nav-link-copy strong{font-size:.86rem;line-height:1.2}
.nav-link-copy small{color:var(--muted);font-size:.72rem;line-height:1.35}
.teacher-nav-account{padding-top:2px;border-top:1px solid #edf0f4}
.teacher-nav-actions{display:grid;gap:8px}
.teacher-nav-actions .ghost-btn,.teacher-logout .ghost-btn{width:100%}
.teacher-session-chip{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:10px;padding:10px 11px;border:1px solid var(--line);background:rgba(255,255,255,.84);border-radius:18px}
.teacher-session-avatar{width:34px;height:34px;display:grid;place-items:center;border-radius:11px;background:var(--soft);color:var(--primary-2);font-weight:900}
.teacher-session-chip strong{font-size:.78rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.teacher-session-chip small{font-size:.64rem;color:var(--muted)}
.teacher-session-chip>a{display:grid;place-items:center;width:32px;height:32px;border-radius:11px;text-decoration:none;color:var(--muted);background:#f7f9fc}
.teacher-menu-toggle{display:inline-flex;align-items:center;gap:8px;min-height:42px;padding:0 12px;border-radius:14px;border:1px solid var(--line);background:rgba(255,255,255,.84);color:var(--ink);font-weight:850;cursor:pointer;box-shadow:0 8px 20px rgba(31,43,70,.05)}
.teacher-menu-toggle:hover{background:#fff}
.menu-lines{display:grid;gap:4px}
.menu-lines i{width:16px;height:2px;background:currentColor;border-radius:99px;transition:transform .18s ease,opacity .18s ease}
.teacher-nav.nav-collapsed{padding-inline:12px;gap:10px}
.teacher-nav.nav-collapsed .teacher-nav-intro,
.teacher-nav.nav-collapsed .teacher-workspace-chip,
.teacher-nav.nav-collapsed .teacher-nav-label,
.teacher-nav.nav-collapsed .nav-link-copy,
.teacher-nav.nav-collapsed .teacher-session-chip strong,
.teacher-nav.nav-collapsed .teacher-session-chip small,
.teacher-nav.nav-collapsed .teacher-nav-actions{display:none}
.teacher-nav.nav-collapsed .teacher-nav-links{gap:6px}
.teacher-nav.nav-collapsed .teacher-nav-link{grid-template-columns:1fr;justify-items:center;padding:11px 0}
.teacher-nav.nav-collapsed .teacher-nav-link .nav-icon{width:38px;height:38px;border-radius:13px}
.teacher-nav.nav-collapsed .teacher-session-chip{grid-template-columns:1fr;justify-items:center}
.teacher-nav.nav-collapsed .teacher-session-chip>a{display:none}
.teacher-nav.nav-collapsed .teacher-brand{justify-content:center;width:100%}
.teacher-nav.nav-collapsed .teacher-brand strong{display:none}
.teacher-nav.nav-collapsed .teacher-menu-toggle{width:100%;justify-content:center}
.teacher-nav.nav-collapsed .teacher-nav-main{justify-content:center}
.teacher-nav.nav-collapsed .menu-toggle-label{display:none}
.teacher-nav.nav-open .menu-lines i:nth-child(1){transform:translateY(6px) rotate(45deg)}
.teacher-nav.nav-open .menu-lines i:nth-child(2){opacity:0}
.teacher-nav.nav-open .menu-lines i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.mobile-app-nav{display:none}
@media(min-width:1100px){body.teacher-nav-collapsed .teacher-shell{padding-left:170px}}
@media(max-width:1080px){.teacher-nav{position:relative;top:0}}
@media(max-width:760px){.teacher-nav{display:block;margin-bottom:22px;padding:10px;border-radius:22px}.teacher-nav-main{width:100%}.teacher-menu-toggle{display:inline-flex}.teacher-nav-panel{display:none!important;position:absolute;top:62px;left:10px;right:10px;z-index:50;background:rgba(255,255,255,.98);border:1px solid var(--line);border-radius:20px;padding:12px;box-shadow:0 20px 50px rgba(31,43,70,.16)}.teacher-nav.nav-open .teacher-nav-panel{display:grid!important}.teacher-nav.nav-collapsed{padding:10px}.teacher-nav.nav-collapsed .teacher-nav-panel{display:none!important}.teacher-nav.nav-collapsed .teacher-brand strong{display:inline}.mobile-app-nav{position:fixed;display:grid;grid-template-columns:repeat(6,1fr);left:10px;right:10px;bottom:max(8px,env(safe-area-inset-bottom));z-index:55;background:rgba(255,255,255,.96);backdrop-filter:blur(18px);border:1px solid rgba(215,223,235,.95);border-radius:19px;padding:6px;box-shadow:0 16px 40px rgba(27,39,68,.18)}.mobile-app-nav a{min-width:0;display:grid;place-items:center;gap:2px;padding:6px 2px;border-radius:13px;text-decoration:none;color:#7a8597}.mobile-app-nav a>span{font-size:1rem;line-height:1}.mobile-app-nav small{font-size:.58rem;font-weight:800;white-space:nowrap}.mobile-app-nav a.active,.mobile-app-nav a[aria-current="page"]{background:var(--soft);color:var(--primary-2)}}

.teacher-shell{width:min(1440px,100%);margin:auto;padding:24px 32px 40px}
.teacher-shell-grid{display:grid;grid-template-columns:minmax(280px,320px) minmax(0,1fr);gap:18px;align-items:start}
.teacher-workspace{min-width:0;display:grid;gap:18px}
body.teacher-nav-collapsed .teacher-shell{padding-left:32px}
body.teacher-nav-collapsed .teacher-shell-grid{grid-template-columns:116px minmax(0,1fr)}
body.teacher-nav-collapsed .teacher-workspace{min-width:0}
@media(max-width:1080px){.teacher-shell-grid{grid-template-columns:1fr}}
@media(max-width:760px){.teacher-shell{padding:18px 10px 96px}.teacher-shell-grid{display:block}.teacher-workspace{gap:16px}.teacher-shell-grid>.teacher-nav{margin-bottom:16px}}