@charset "UTF-8";
:root{--ink:#193648;--muted:#637686;--subtle:#80909a;--paper:#fff;--canvas:#f5f7f8;--line:#dfe7eb;--soft:#eef3f5;--brand:#174c63;--brand-dark:#123d50;--accent:#087c67;--accent-soft:#e7f4ee;--warning:#8f6515;--warning-soft:#fff5dc;--danger:#aa3d3d;--danger-soft:#fff0ee;--shadow:0 12px 40px #19364808;--radius:18px;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;color:var(--ink);font-synthesis:none}
*{box-sizing:border-box}body{margin:0;background:var(--canvas);font-size:15px;line-height:1.6}button,input,textarea,select{font:inherit}a{color:var(--brand);text-underline-offset:3px}button,a,input,textarea,select{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}button,input,textarea,select,a{outline-offset:4px}button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,a:focus-visible{outline:3px solid #72a7c0}input,textarea,select{accent-color:var(--brand)}h1,h2,h3,p{margin:0}h1{font-size:clamp(30px,4.1vw,44px);line-height:1.15;letter-spacing:-1.5px;font-weight:650}h2{font-size:23px;line-height:1.3;letter-spacing:-.6px;font-weight:650}h3{font-size:17px;line-height:1.4;font-weight:650}p+p{margin-top:12px}small{font-size:12px}strong{font-weight:650}[hidden]{display:none!important}
.skip-link{position:fixed;left:16px;top:-70px;z-index:100;background:var(--ink);color:#fff;padding:12px 18px;border-radius:10px}.skip-link:focus{top:16px}.site-header{height:94px;max-width:1360px;margin:auto;padding:0 48px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:13px;text-decoration:none;color:var(--ink);line-height:1.25}.brand-mark{width:43px;height:43px;display:grid;place-items:center;border-radius:12px;background:var(--brand);color:#fff;font-size:18px;font-weight:700;letter-spacing:-1px}.brand strong{font-size:15px}.brand-subtitle{display:block;font-size:12px;color:var(--muted);margin-top:3px}.header-right{display:flex;gap:28px;align-items:center}.header-link{text-decoration:none;font-size:13px;color:var(--muted)}.header-link span{margin-left:8px}.connection-status{display:inline-flex;align-items:center;gap:7px;color:var(--muted);font-size:12px;white-space:nowrap}.connection-status i{width:6px;height:6px;flex:none;border-radius:50%;background:var(--subtle)}.connection-status.online i{background:var(--accent)}.connection-status.offline i{background:var(--warning)}.site-footer{max-width:1264px;margin:48px auto 0;border-top:1px solid var(--line);padding:22px 0 30px;display:flex;justify-content:space-between;color:var(--subtle);font-size:12px}.initial-loading{min-height:50vh;display:flex;gap:12px;align-items:center;justify-content:center;color:var(--muted)}.spinner{height:18px;width:18px;display:inline-block;border:2px solid var(--line);border-top-color:var(--brand);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}
.page{max-width:1120px;margin:34px auto 0;padding:0 24px}.page.narrow{max-width:760px}.page.wide{max-width:1312px}.eyebrow{display:flex;align-items:center;gap:8px;font-size:11px;font-weight:650;letter-spacing:1.5px;text-transform:uppercase;color:var(--accent);margin-bottom:17px}.eyebrow:before{content:"";width:22px;height:1px;background:currentColor}.intro{margin-bottom:30px}.intro p{color:var(--muted);max-width:640px;font-size:16px;margin-top:17px}.hero-grid{display:grid;grid-template-columns:1.06fr 1fr;gap:66px;align-items:start;margin-top:70px}.hero-copy{padding-top:16px}.hero-copy p{font-size:16px;color:var(--muted);margin-top:24px;max-width:430px}.steps{list-style:none;counter-reset:steps;margin:36px 0 0;padding:0;display:grid;gap:22px}.steps li{counter-increment:steps;display:grid;grid-template-columns:29px 1fr;column-gap:12px;align-items:start;color:var(--muted);font-size:13px}.steps li:before{content:counter(steps);width:27px;height:27px;display:grid;place-items:center;border:1px solid #cedbe1;border-radius:50%;color:var(--brand);font-size:12px}.steps strong{display:block;color:var(--ink);font-size:14px;margin-bottom:2px}.card{border:1px solid var(--line);background:var(--paper);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow)}.card+.card{margin-top:20px}.card-title{display:flex;gap:12px;justify-content:space-between;align-items:flex-start;margin-bottom:24px}.card-title p{color:var(--muted);font-size:13px;margin-top:7px}.muted{color:var(--muted)}.subtle{color:var(--subtle)}.small{font-size:13px}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.stack{display:grid;gap:18px}.field{display:grid;gap:7px}.field label,.field-label{font-size:13px;font-weight:600;color:var(--ink)}.field-help{font-size:12px;color:var(--muted);font-weight:400}.input{width:100%;min-height:46px;border:1px solid #cfdbe2;border-radius:10px;background:#fff;padding:10px 13px;color:var(--ink);transition:border-color .15s}.input:hover{border-color:#95adba}.input:focus{border-color:var(--brand)}textarea.input{resize:vertical;min-height:92px;line-height:1.5}.input.code-input{text-transform:uppercase;font-size:25px;text-align:center;letter-spacing:6px;padding:15px;min-height:65px;font-weight:600}.input::placeholder{color:#9baab3}.field-row{display:grid;grid-template-columns:1fr 1fr;gap:15px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 18px;border:1px solid transparent;border-radius:10px;font-size:13px;font-weight:600;line-height:1.4;text-decoration:none;transition:background .15s,box-shadow .15s;color:var(--ink);background:var(--soft)}.btn:hover{background:#e2eaee}.btn.primary{background:var(--brand);color:#fff}.btn.primary:hover{background:var(--brand-dark)}.btn.secondary{background:#fff;border-color:#cddae0}.btn.secondary:hover{background:var(--soft)}.btn.danger{background:var(--danger-soft);color:var(--danger);border-color:#f0d7d2}.btn.small{min-height:34px;font-size:12px;padding:7px 12px}.btn.ghost{background:transparent;padding-left:0;padding-right:0;color:var(--brand)}.btn.block{width:100%}.btn.big{min-height:50px;font-size:14px}.actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.actions.between{justify-content:space-between}.divider{border:0;border-top:1px solid var(--line);margin:24px 0}.notice{font-size:13px;line-height:1.6;background:var(--soft);padding:15px 17px;border-radius:11px;color:var(--muted)}.notice strong{color:var(--ink)}.notice.warning{background:var(--warning-soft);color:#7c5c26}.notice.danger{background:var(--danger-soft);color:#95423b}.notice.success{background:var(--accent-soft);color:#296c54}.notice p+p{margin-top:6px}.error-text{font-size:13px;color:var(--danger);margin-top:12px}.badge{display:inline-flex;align-items:center;gap:6px;white-space:nowrap;border-radius:6px;background:var(--soft);color:var(--muted);font-size:11px;padding:4px 8px;line-height:1.35;font-weight:600}.badge.green{background:var(--accent-soft);color:#226b50}.badge.yellow{background:var(--warning-soft);color:#87621e}.badge.red{background:var(--danger-soft);color:#a24b43}.badge.blue{background:#e8f0f8;color:#376287}.check-row{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--muted)}.check-row input{margin-top:4px;width:16px;height:16px;flex:none}.check-row strong{color:var(--ink)}.identity{display:flex;justify-content:space-between;align-items:center;gap:15px;padding:17px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.identity strong{display:block}.identity small{color:var(--muted)}.metadata{display:flex;gap:20px;flex-wrap:wrap;color:var(--muted);font-size:13px}.metadata span+span{border-left:1px solid var(--line);padding-left:20px}.empty-state{padding:38px 20px;text-align:center;color:var(--muted);font-size:14px}.empty-state h3{margin-bottom:8px;color:var(--ink)}.result-hero{padding:16px 0 25px}.result-icon{display:grid;place-items:center;width:54px;height:54px;font-size:25px;background:var(--accent-soft);color:var(--accent);border-radius:50%;margin-bottom:22px}.result-icon.warning{background:var(--warning-soft);color:var(--warning)}.result-hero h1{font-size:34px}.result-hero p{margin-top:15px;color:var(--muted)}
.test-checks{display:grid;gap:0;margin:18px 0}.test-check{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 0;border-bottom:1px solid var(--line);font-size:13px}.test-check:last-child{border:0}.test-check span:first-child{color:var(--muted)}.test-check .pass{color:var(--accent)}.test-check .fail{color:var(--warning)}
.exam-shell{max-width:1120px;margin:14px auto 0;padding:0 24px 30px}.exam-top{position:sticky;top:0;z-index:10;background:var(--canvas);padding:18px 0;display:flex;align-items:center;justify-content:space-between;gap:18px;border-bottom:1px solid var(--line)}.exam-title{font-size:15px;font-weight:650}.exam-subline{display:flex;gap:12px;align-items:center;color:var(--muted);font-size:12px;margin-top:3px}.exam-clock{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:26px;font-weight:600;letter-spacing:1px;color:var(--brand);min-width:98px;text-align:right}.exam-clock.low{color:var(--danger)}.exam-grid{display:grid;grid-template-columns:205px minmax(0,1fr);gap:28px;margin-top:28px;align-items:start}.exam-sidebar{position:sticky;top:110px}.exam-sidebar h3{font-size:12px;color:var(--muted);font-weight:500;margin-bottom:14px}.question-map{display:grid;grid-template-columns:repeat(4,1fr);gap:7px}.question-chip{min-width:0;aspect-ratio:1;border:1px solid var(--line);background:#fff;border-radius:8px;color:var(--muted);font-size:12px}.question-chip.current{border:2px solid var(--brand);color:var(--brand);font-weight:700}.question-chip.answered{background:var(--accent-soft);border-color:#c6dfd0;color:#276747}.map-key{display:flex;align-items:center;gap:7px;font-size:11px;color:var(--muted);margin:14px 0 24px}.map-key:before{content:"";width:9px;height:9px;background:var(--accent-soft);border:1px solid #c6dfd0;border-radius:2px}.progress-track{height:4px;background:#e3eaf0;border-radius:5px;overflow:hidden}.progress-track span{display:block;height:100%;background:var(--accent);transition:width .2s}.question-card{min-height:350px;padding:32px}.question-meta{display:flex;align-items:center;justify-content:space-between;font-size:11px;color:var(--subtle);margin-bottom:20px;text-transform:uppercase;letter-spacing:1px}.question-prompt{font-size:19px;font-weight:550;white-space:pre-wrap;line-height:1.6;overflow-wrap:anywhere;margin-bottom:27px}.choice-list{display:grid;gap:11px}.choice{display:flex;align-items:flex-start;gap:13px;padding:14px 16px;border:1px solid var(--line);border-radius:10px;cursor:pointer;transition:background .15s}.choice:hover{background:#f7fafb}.choice:has(input:checked){border-color:#92b6c7;background:#f1f7fa}.choice input{margin-top:4px;width:16px;height:16px;flex:none}.choice span{white-space:pre-wrap;overflow-wrap:anywhere}.answer-text{min-height:125px!important}.question-nav{margin-top:25px;display:flex;justify-content:space-between;gap:12px}.save-state{font-size:12px;color:var(--muted)}.exam-rule{font-size:11px;color:var(--muted);margin-top:20px;line-height:1.6}.locked-state{max-width:660px;margin:60px auto;padding:0 24px}.no-scroll{overflow:hidden}.dialog-backdrop{position:fixed;inset:0;background:#122d4166;z-index:100;display:flex;align-items:center;justify-content:center;padding:22px;backdrop-filter:blur(3px)}.dialog{background:#fff;border:1px solid var(--line);padding:30px;border-radius:18px;max-width:480px;width:100%;box-shadow:0 25px 100px #0d243326}.dialog p{color:var(--muted);margin-top:15px}.dialog .actions{margin-top:24px;justify-content:flex-end}.dialog .field{margin-top:19px}.toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);z-index:200;background:var(--ink);color:#fff;padding:12px 20px;border-radius:10px;box-shadow:0 10px 40px #19364833;max-width:calc(100% - 36px);font-size:13px}.noscript{margin:30px;padding:20px;background:var(--warning-soft)}
.admin-page{max-width:1320px;margin:20px auto;padding:0 28px}.admin-layout{display:grid;grid-template-columns:195px minmax(0,1fr);gap:35px;align-items:start}.admin-sidebar{padding:15px 0;position:sticky;top:20px}.admin-sidebar h2{font-size:12px;color:var(--subtle);text-transform:uppercase;letter-spacing:1.1px;margin-bottom:19px;font-weight:550}.admin-menu{display:grid;gap:4px}.admin-tab{border:0;background:transparent;text-align:left;padding:11px 13px;border-radius:9px;color:var(--muted);font-size:13px}.admin-tab.active{background:#e7eef2;color:var(--brand);font-weight:600}.admin-tab:hover{background:#eef2f4}.admin-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:27px}.admin-heading h1{font-size:30px}.admin-heading p{font-size:13px;color:var(--muted);margin-top:9px}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:24px}.stat-card{padding:19px 22px;border:1px solid var(--line);background:#fff;border-radius:12px}.stat-card span{font-size:12px;color:var(--muted)}.stat-card strong{font-size:28px;display:block;font-weight:550;line-height:1.3;margin-top:7px}.table-wrap{width:100%;overflow:auto;border:1px solid var(--line);border-radius:12px;background:#fff}.data-table{border-collapse:collapse;width:100%;font-size:12px;line-height:1.5}.data-table th{text-align:left;font-size:10px;letter-spacing:.65px;text-transform:uppercase;color:var(--subtle);font-weight:600;background:#f8fafb;padding:13px 15px;white-space:nowrap}.data-table td{border-top:1px solid var(--line);padding:13px 15px;vertical-align:middle}.data-table td.name-cell{min-width:190px;font-weight:550}.data-table td .subline{display:block;font-weight:400;font-size:11px;color:var(--muted);margin-top:3px}.data-table .btn{white-space:nowrap}.toolbar{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:17px;flex-wrap:wrap}.toolbar .input{min-height:39px;max-width:300px;font-size:13px}.test-list{display:grid;gap:13px}.test-item{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px 23px;display:flex;gap:20px;align-items:center;justify-content:space-between}.test-item h3{font-size:15px}.test-item p{font-size:12px;color:var(--muted);margin-top:7px}.editor-card{padding:25px}.editor-top{display:grid;grid-template-columns:minmax(0,1fr) 140px;gap:15px}.editor-question{border:1px solid var(--line);border-radius:13px;padding:22px;margin-top:17px;background:#fff}.editor-question-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:17px}.editor-question-top strong{font-size:12px;color:var(--muted)}.editor-question-top .actions{gap:12px}.editor-question-top .input{min-height:35px;font-size:12px;width:190px;padding:6px 9px}.remove-button{border:0;background:transparent;color:var(--muted);font-size:18px;padding:1px 7px;border-radius:5px}.remove-button:hover{background:var(--danger-soft);color:var(--danger)}.editor-option{display:grid;grid-template-columns:20px minmax(0,1fr) 25px;align-items:center;gap:8px;margin-top:9px}.editor-option input[type=checkbox],.editor-option input[type=radio]{width:16px;height:16px}.editor-option .input{min-height:39px;font-size:13px}.editor-answer-row{display:grid;grid-template-columns:1fr 110px;gap:15px;margin-top:16px}.editor-footer{position:sticky;bottom:0;margin-top:22px;padding:17px 0;background:var(--canvas);display:flex;justify-content:space-between;align-items:center;gap:15px}.editor-footer .small{max-width:370px}.board-panel{text-align:center;background:#fff;border:1px solid var(--line);border-radius:18px;padding:50px 25px}.board-code{font-size:clamp(50px,8vw,88px);letter-spacing:14px;font-weight:650;line-height:1.25;margin:26px 0;color:var(--brand);font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.board-url{font-size:14px;color:var(--muted);overflow-wrap:anywhere}.board-panel:fullscreen{display:flex;flex-direction:column;justify-content:center;align-items:center;width:100%;height:100%;border:0;border-radius:0}.board-panel:fullscreen .board-code{font-size:120px}.event-list{list-style:none;margin:0;padding:0;display:grid;gap:0}.event-list li{padding:12px 0;border-top:1px solid var(--line);font-size:12px;display:grid;grid-template-columns:140px 1fr;gap:15px}.event-list time{color:var(--muted)}.pre-wrap{white-space:pre-wrap;overflow-wrap:anywhere}.inline-form{display:flex;gap:10px;align-items:flex-end}.inline-form .field{flex:1}.session-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:22px}.session-grid .card{margin:0}.admin-message{padding:11px 0;color:var(--muted);font-size:12px}
@media(min-width:1450px){.hero-grid{margin-top:95px}.page{margin-top:40px}}
@media(max-width:1000px){.site-header{padding:0 28px}.site-footer{margin-left:28px;margin-right:28px}.hero-grid{gap:30px}.card{padding:24px}.admin-layout{grid-template-columns:155px minmax(0,1fr);gap:20px}.test-item{align-items:flex-start;flex-direction:column;gap:14px}.session-grid{grid-template-columns:1fr}.exam-grid{grid-template-columns:160px minmax(0,1fr);gap:20px}.question-card{padding:26px}.stats{gap:10px}.stat-card{padding:16px}}
@media(max-width:720px){.site-header{height:78px;padding:0 20px}.brand-mark{width:37px;height:37px;font-size:16px;border-radius:10px}.brand strong{font-size:13px}.brand-subtitle{font-size:10px}.header-right{gap:12px}.header-link{font-size:11px}.connection-status{font-size:0;gap:0}.connection-status i{height:7px;width:7px}.page,.page.wide,.page.narrow{padding:0 20px;margin-top:20px}.hero-grid{grid-template-columns:1fr;gap:28px;margin-top:25px}.hero-copy{padding:0}.hero-copy h1{max-width:470px}.hero-copy p{font-size:15px;margin-top:18px;max-width:100%}.steps{margin-top:25px;gap:15px}.card{padding:23px;border-radius:14px}.hero-copy .steps{display:none}.site-footer{margin:35px 20px 0;gap:15px;font-size:10px}.intro{margin-bottom:23px}.intro p{font-size:14px;margin-top:13px}.field-row{gap:12px}.identity{align-items:flex-start}.admin-page{padding:0 16px;margin-top:12px}.admin-layout{grid-template-columns:1fr;gap:20px}.admin-sidebar{position:static;padding:0}.admin-sidebar h2{display:none}.admin-menu{display:flex;overflow:auto;border-bottom:1px solid var(--line);gap:5px;padding-bottom:8px}.admin-tab{white-space:nowrap;font-size:12px;padding:9px 12px}.admin-sidebar>.btn{display:none}.admin-heading{margin-bottom:20px}.admin-heading h1{font-size:26px}.admin-heading .btn{font-size:12px;padding:9px 12px;min-height:39px}.stats{gap:7px}.stat-card{padding:12px}.stat-card span{font-size:10px}.stat-card strong{font-size:23px}.toolbar{gap:10px}.toolbar .input{max-width:100%}.editor-top{grid-template-columns:minmax(0,1fr) 100px}.editor-card,.editor-question{padding:18px}.editor-question-top .input{width:150px;font-size:11px}.editor-footer{align-items:flex-start}.editor-footer .small{font-size:11px;max-width:180px}.board-panel{padding:33px 18px}.board-code{letter-spacing:7px}.event-list li{grid-template-columns:1fr;gap:3px}.exam-shell{padding:0 16px 25px;margin-top:0}.exam-top{padding:13px 0}.exam-title{font-size:13px}.exam-clock{font-size:22px;min-width:85px}.exam-grid{grid-template-columns:1fr;gap:17px;margin-top:20px}.exam-sidebar{position:static}.exam-sidebar h3,.exam-sidebar .map-key,.exam-sidebar .exam-rule,.exam-sidebar .progress-track{display:none}.question-map{display:flex;overflow-x:auto;padding-bottom:6px;gap:6px}.question-chip{width:36px;min-width:36px;height:36px;aspect-ratio:auto}.question-card{padding:22px;min-height:320px}.question-prompt{font-size:17px}.question-nav .btn{font-size:12px;padding:10px 13px}.question-nav{gap:9px}.dialog{padding:23px}.metadata{gap:13px}.metadata span+span{padding-left:13px}.session-grid{gap:15px}.inline-form{flex-wrap:wrap}.inline-form .field{min-width:180px}}
@media(prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;transition:none!important;scroll-behavior:auto!important}}

/* Local layout helpers keep the strict content security policy intact. */
[data-layout="layout-1"]{margin-top:22px}
[data-layout="layout-2"]{margin-top:19px}
[data-layout="layout-3"]{margin-top:20px}
[data-layout="layout-4"]{margin-top:15px}
[data-layout="layout-5"]{margin-top:17px}
[data-layout="layout-6"]{margin-top:24px}
[data-layout="layout-7"]{margin-top:9px}
[data-layout="layout-8"]{margin-top:60px}
[data-layout="layout-9"]{margin-top:14px}
[data-layout="layout-10"]{margin-top:25px}
[data-layout="layout-11"]{margin-top:18px}
[data-layout="layout-12"]{margin-top:42px}
[data-layout="layout-13"]{margin-top:25px;justify-content:center}
[data-layout="layout-14"]{margin-top:17px;max-width:160px}
progress.progress-track{display:block;border:0;width:100%;appearance:none;-webkit-appearance:none}progress.progress-track::-webkit-progress-bar{background:#e3eaf0;border-radius:5px}progress.progress-track::-webkit-progress-value{background:var(--accent);border-radius:5px}progress.progress-track::-moz-progress-bar{background:var(--accent);border-radius:5px}

/* Attendance, classroom monitoring and the in-page ML workspace. */
.presence-code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:44px;line-height:1.3;font-weight:650;letter-spacing:8px;color:var(--brand);padding:22px 0;text-align:center}
.presence-caption{text-align:center;color:var(--muted);font-size:12px}
.live-toolbar{display:grid;grid-template-columns:minmax(160px,1fr) minmax(160px,1fr) minmax(170px,1.2fr);gap:13px;margin-bottom:20px}
.live-meta{display:flex;gap:16px;align-items:center;justify-content:space-between;flex-wrap:wrap;margin:15px 0;color:var(--muted);font-size:12px}
.live-table{min-width:850px}
.live-table .progress-track{height:4px;margin-top:6px;max-width:120px}
.live-table td{vertical-align:top}
.live-table tr.needs-attention{background:#fffaf0}
.live-actions{display:flex;gap:6px;flex-wrap:wrap;min-width:140px}
.live-status{max-width:180px}
.tg-link{font-size:12px;text-decoration:none}
.room-meta{display:flex;gap:9px;align-items:center;flex-wrap:wrap;margin-top:9px;font-size:12px;color:var(--muted)}


.notebook-shell{margin-top:20px;border-top:1px solid var(--line);padding-top:20px}
.notebook-toolbar{display:flex;justify-content:space-between;align-items:flex-start;gap:14px;flex-wrap:wrap;margin-bottom:20px}
.notebook-toolbar .actions{gap:7px}
.notebook-toolbar h3{font-size:15px}
.notebook-caption{font-size:12px;color:var(--muted);margin-top:5px}
.notebook-cells{display:grid;gap:17px}
.notebook-cell{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff}
.notebook-cell-head{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:9px 12px;background:#f6f8fa;border-bottom:1px solid var(--line)}
.notebook-cell-head .actions{gap:6px}
.notebook-cell-head span{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:11px;color:var(--muted)}
.notebook-cell-head .btn{min-height:30px;font-size:11px;padding:6px 10px}
.notebook-code{display:block;width:100%;min-height:145px;max-height:560px;resize:vertical;border:0;border-radius:0;outline-offset:-3px;padding:16px;background:#fff;color:#17374a;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;line-height:1.65;tab-size:4;white-space:pre;overflow:auto}
.notebook-output{border-top:1px solid var(--line);padding:13px 15px;font-size:12px;overflow:hidden}
.notebook-output:empty{display:none}
.notebook-output pre{margin:0;white-space:pre-wrap;overflow-wrap:anywhere;font:12px/1.65 ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--ink)}
.notebook-output pre.stderr,.notebook-error{color:var(--danger)}
.notebook-output img{display:block;max-width:100%;height:auto;margin:10px 0;background:#fff}
.notebook-output .table-wrap{margin:8px 0;border-radius:7px}
.notebook-output .data-table{font-size:11px}
.notebook-output .data-table th,.notebook-output .data-table td{padding:7px 10px}
.notebook-output .data-table th{letter-spacing:0;text-transform:none}
.notebook-save-state{font-size:11px;color:var(--muted)}



.notebook-submit{margin-top:22px;padding:18px;border:1px solid var(--line);border-radius:11px;background:#f8fafb}
.notebook-submit .inline-form{margin-top:12px}
.notebook-submit .notice{margin-top:13px}
.notebook-runtime{font-size:11px;color:var(--muted);min-height:18px}



.notebook-editor-settings{background:#f6f8fa;border:1px solid var(--line);border-radius:10px;padding:17px;margin-top:17px}
.notebook-editor-settings .field+.field{margin-top:14px}
.environment-state{font-size:12px;line-height:1.6;color:var(--muted)}
@media(max-width:1000px){.live-toolbar{grid-template-columns:1fr 1fr}.live-toolbar .field:last-child{grid-column:1/-1}.notebook-toolbar{gap:12px}}
@media(max-width:720px){.presence-code{font-size:36px;letter-spacing:6px}.live-toolbar{grid-template-columns:1fr}.live-toolbar .field:last-child{grid-column:auto}.live-meta{gap:9px}.notebook-cell-head{padding:8px 10px}.notebook-code{padding:12px;min-height:170px;font-size:12px}.notebook-output{padding:11px}.notebook-toolbar .actions{gap:6px}.notebook-toolbar .btn{padding:8px 11px}.notebook-submit{padding:14px}.notebook-submit .inline-form{display:grid;grid-template-columns:1fr}}
.dialog{max-height:calc(100dvh - 44px);overflow:auto}
.dialog .field+.field{margin-top:16px}
.dialog>.field,.dialog form>.field{margin-top:16px}
.staff-list{max-height:180px;overflow:auto}

.historical-notebook{margin-top:18px;border:1px solid var(--line);border-radius:11px;background:#fff}.historical-notebook>summary{cursor:pointer;padding:13px 15px;font-weight:600;font-size:13px;color:var(--brand)}.historical-notebook[open]>summary{border-bottom:1px solid var(--line)}.historical-notebook-body{padding:17px}.notebook-readonly-code{margin:0;padding:15px;white-space:pre-wrap;overflow-wrap:anywhere;font:12px/1.65 ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--ink)}

@media (max-width: 720px) {
  .site-header { height: auto; min-height: 78px; padding: max(12px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right)) 12px max(12px, env(safe-area-inset-left)); gap: 8px 12px; flex-wrap: wrap; }
  .brand { flex: 1 1 160px; min-width: 0; gap: 9px; }
  .brand > span:last-child { min-width: 0; }
  .brand-mark { flex: none; }
  .header-right { gap: 10px; }
  .header-link { display: inline-flex; align-items: center; min-height: 44px; }
  .page, .page.wide, .page.narrow { min-width: 0; padding: 0 max(12px, env(safe-area-inset-right)) 0 max(12px, env(safe-area-inset-left)); }
  .hero-grid, .hero-copy, .card, .field, .field-row, .test-item, .test-item > div,
  .exam-grid, .exam-grid > div, .question-card, .question-statement { min-width: 0; max-width: 100%; }
  .hero-copy h1, .intro h1, .card h2, .test-item h3 { overflow-wrap: anywhere; }
  .hero-copy .steps { display: grid; }
  .hero-grid:has(#auth-card) { display: flex; flex-direction: column; gap: 18px; }
  .hero-grid:has(#auth-card) .hero-copy { display: contents; }
  .hero-grid:has(#auth-card) .hero-copy > .eyebrow { order: 0; margin-bottom: 0; }
  .hero-grid:has(#auth-card) .hero-copy > h1 { order: 1; }
  .hero-grid:has(#auth-card) .hero-copy > p { order: 2; margin-top: 0; }
  .hero-grid:has(#auth-card) #auth-card { order: 3; width: 100%; }
  .hero-grid:has(#auth-card) .steps { order: 4; margin-top: 0; }
  .card { padding: 20px 16px; }
  .card-title, .identity { flex-wrap: wrap; gap: 12px; }
  .card-title > div, .identity > div { min-width: 0; overflow-wrap: anywhere; }
  .input { min-width: 0; max-width: 100%; font-size: 16px; }
  .input.code-input { font-size: clamp(18px, 6vw, 25px); letter-spacing: .12em; padding: 12px 8px; }
  .btn, .btn.small, .btn.big { min-height: 44px; max-width: 100%; white-space: normal; overflow-wrap: anywhere; }
  .actions > .btn { min-width: 0; }
  .check-row, .choice { min-height: 44px; }
  .check-row > span, .choice > span { min-width: 0; }
  .choice input, .check-row input { width: 20px; height: 20px; }
  .metadata { gap: 8px 14px; }
  .metadata span { min-width: 0; overflow-wrap: anywhere; }
  .metadata span + span { padding-left: 0; border-left: 0; }
  .test-item { padding: 18px 16px; width: 100%; }
  .test-item > .actions { display: grid; grid-template-columns: minmax(0, 1fr); width: 100%; }
  .test-item > .actions .btn { width: 100%; }
  .notice, .error-text, .pre-wrap, .result-hero h1 { overflow-wrap: anywhere; }
  .test-check { flex-wrap: wrap; gap: 6px 12px; }
  .exam-shell { padding: 0 max(12px, env(safe-area-inset-right)) max(24px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left)); }
  .exam-top { padding-top: max(12px, env(safe-area-inset-top)); gap: 12px; align-items: flex-start; }
  .exam-top > div:first-child { min-width: 0; }
  .exam-title { overflow-wrap: anywhere; }
  .exam-subline { flex-wrap: wrap; gap: 3px 10px; }
  .exam-clock { flex: none; min-width: 72px; font-size: 21px; }
  .question-card { padding: 20px 16px; }
  .question-meta { gap: 12px; flex-wrap: wrap; }
  .question-nav .btn { flex: 1 1 0; min-width: 0; }
  .dialog-backdrop { padding: max(12px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right)) max(12px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left)); }
  .dialog { min-width: 0; padding: 22px 16px; max-height: calc(100dvh - 32px); overscroll-behavior: contain; }
  .dialog .actions { align-items: stretch; }
  .dialog .actions .btn { flex: 1 1 100%; }
  .toast { bottom: max(16px, env(safe-area-inset-bottom)); overflow-wrap: anywhere; }
  .site-footer { flex-wrap: wrap; margin: 30px 12px 0; padding-bottom: max(24px, env(safe-area-inset-bottom)); }
}
@media (max-width: 560px) {
  .field-row { grid-template-columns: minmax(0, 1fr); }
  .inline-form { align-items: stretch; }
  .inline-form .field { min-width: 0; flex-basis: 100%; }
  .inline-form > .btn { width: 100%; }
}