:root{--ink:#193335;--muted:#718181;--teal:#137d79;--teal-dark:#096660;--mint:#e8f5f1;--bg:#f5f8f7;--line:#e4ece9;--white:#fff;--orange:#e6a358;--radius:16px;font-family:Inter,"Segoe UI",Arial,sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}
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#e8efe9;border-radius:13px;padding:17px;margin-bottom:20px}.side-tip .icon{color:var(--teal);margin-bottom:11px}.side-tip h4{margin:0 0 8px;font-size:12px}.side-tip p{font-size:11px;color:var(--muted);margin:0;line-height:1.6}.profile{display:flex;align-items:center;gap:10px;padding:8px 7px}.avatar{background:#f5e8d8;color:#98794e;width:35px;height:35px;border-radius:50%;display:grid;place-items:center;font-size:12px;font-weight:600;flex-shrink:0}.profile-text{min-width:0}.profile-text b{font-size:12px;display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.profile-text span{font-size:10px;color:var(--muted)}.profile button{margin-left:auto;padding:5px;min-width:25px}.main{grid-column:2;min-width:0}.topbar{height:82px;padding:0 42px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;background:#ffffffa6}.breadcrumb{font-size:12px;color:#8a9a94;display:flex;align-items:center;gap:10px}.breadcrumb 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#ccddd2;border-radius:13px}.aside-note h3{font-size:13px;margin:12px 0 8px}.aside-note p{font-size:11px;color:var(--muted);margin:0}.aside-note .icon{color:#659b80}.bottom-hint{margin:24px 0 0;font-size:10px;color:#9ba9a1;display:flex;align-items:center;gap:6px}.bottom-hint .icon{width:13px;height:13px}.empty-state-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.class-card,.question-card{background:white;border:1px solid var(--line);border-radius:14px;padding:23px}.class-card h2{font-size:23px;margin:16px 0 9px}.class-card p{font-size:12px;color:var(--muted)}.student-list{margin-top:18px;display:grid;gap:8px;font-size:12px;color:var(--muted)}.question-card{margin-bottom:15px}.question-card h3{font-size:15px;line-height:1.5;margin:14px 0}.question-options{display:grid;gap:7px;font-size:12px;color:var(--muted)}.question-options .correct{color:var(--teal)}.result-score{font-weight:650;color:var(--teal)}
.auth-page{min-height:100vh;display:grid;grid-template-columns:1fr 1fr;background:white}.auth-aside{background:#e7f2ed;padding:60px;display:flex;flex-direction:column;justify-content:space-between}.auth-aside h1{font-size:43px;line-height:1.2;max-width:420px;margin:60px 0 25px}.auth-aside p{max-width:400px;color:#6e8c80;font-size:14px}.auth-form-wrap{padding:50px;display:flex;align-items:center;justify-content:center}.auth-form{width:100%;max-width:380px}.auth-form h2{font-size:27px;margin-bottom:12px}.auth-form>p{font-size:13px;color:var(--muted);margin-bottom:30px}.field{display:grid;gap:8px;margin-bottom:18px;min-width:0}.field label,.field-label{font-size:12px;font-weight:600}.field input,.field textarea,.field select{border:1px solid #dbe6df;border-radius:8px;padding:12px;background:white;width:100%;font-size:13px;color:var(--ink)}.field textarea{resize:vertical;min-height:90px}.field small{font-size:10px;color:var(--muted);line-height:1.5}.form-error{font-size:12px;color:#b14e47;line-height:1.5;min-height:18px;margin:5px 0 15px}.auth-switch{text-align:center;font-size:12px;margin-top:22px;color:var(--muted)}.auth-switch a{color:var(--teal)}.full{width:100%}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:20px}.editor-grid{display:grid;grid-template-columns:minmax(0,1fr) 285px;gap:24px;align-items:start}.editor-panel{padding:25px}.editor-panel h2{font-size:15px;margin-bottom:24px}.editor-card{border:1px solid var(--line);border-radius:12px;padding:22px;margin-bottom:17px;background:white}.question-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:19px}.question-head b{font-size:12px;display:flex;gap:9px;align-items:center}.question-head span{width:23px;height:23px;background:var(--mint);color:var(--teal);border-radius:5px;display:grid;place-items:center;font-size:11px}.option-row{display:flex;align-items:center;gap:10px;margin:10px 0}.option-row input[type=text]{flex:1;border:1px solid var(--line);border-radius:7px;padding:10px;font-size:12px;min-width:0}.option-row input[type=checkbox],.option-row input[type=radio]{accent-color:var(--teal);width:17px;height:17px}.editor-help{position:sticky;top:25px}.editor-help p{font-size:12px;color:var(--muted);margin-bottom:20px}.editor-help ul{padding-left:18px;color:var(--muted);font-size:11px;line-height:1.9}.editor-help h3{font-size:14px}.editor-summary{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:17px;font-size:12px;margin:22px 0}.field-inline{display:flex;gap:10px;align-items:center;font-size:12px}.field-inline input{width:65px;padding:8px;border:1px solid var(--line);border-radius:7px}.add-question{width:100%;padding:16px;border:1px dashed #b9d2c4;border-radius:10px;background:#eef6f1;color:var(--teal);font-size:13px;display:flex;align-items:center;gap:8px;justify-content:center}.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.settings-card{padding:26px}.settings-card h2{font-size:17px}.settings-card p{font-size:12px;color:var(--muted)}.token-value{font:12px Consolas,monospace;background:#edf5ef;padding:15px;border-radius:8px;word-break:break-all;user-select:all}.token-list{display:grid;gap:10px;margin-top:20px}.token-row{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);padding:12px 0;font-size:12px}.roadmap{display:grid;gap:0;margin-top:27px}.roadmap-step{display:flex;gap:17px;padding:23px 0;border-top:1px solid var(--line)}.roadmap-step .icon{color:var(--teal);width:26px;height:26px}.roadmap-step h3{font-size:14px;margin-bottom:8px}.roadmap-step p{font-size:12px;color:var(--muted);margin:0}.settings-list{display:grid;gap:17px;font-size:12px;color:var(--muted);margin-top:25px}.settings-list b{color:var(--ink);font-weight:550;display:block;margin-bottom:6px}dialog{border:0;border-radius:17px;padding:30px;width:min(620px,calc(100% - 32px));max-height:90vh;color:var(--ink);box-shadow:0 25px 100px #17352b40}dialog::backdrop{background:#17342d70;backdrop-filter:blur(3px)}.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;gap:15px}.modal-header h2{font-size:21px;margin:0}.modal-header .btn{padding:7px}.modal-footer{display:flex;justify-content:flex-end;gap:10px;margin-top:24px}.notice{background:#eef6f1;color:#678373;border-radius:9px;padding:14px;font-size:11px;line-height:1.7;margin-bottom:20px}.manual-question{border-top:1px solid var(--line);padding:17px 0}.manual-question h3{font-size:12px;line-height:1.5;margin-bottom:12px}.manual-answer{display:flex;align-items:center;gap:10px;font-size:12px;margin:10px 0}.manual-answer input{accent-color:var(--teal)}#toast{position:fixed;right:25px;bottom:25px;background:#193c34;color:white;padding:15px 22px;border-radius:10px;font-size:13px;box-shadow:0 10px 40px #14352f26;max-width:400px;z-index:20;opacity:0;pointer-events:none;transition:opacity .2s}#toast.show{opacity:1}#toast.error{background:#963f38}#print-area{display:none}
.scanner-layout,.scanner-review-layout{display:grid;grid-template-columns:minmax(0,1fr) 285px;gap:24px;align-items:start}.scanner-camera,.scanner-review,.scanner-help-card,.scanner-empty,.scanner-success{padding:26px}.scanner-camera-head{display:flex;justify-content:space-between;gap:20px}.scanner-camera h2,.scanner-review h2,.scanner-success h2{font-size:23px;margin:15px 0 8px}.scanner-camera-head p,.scanner-review-head p,.scanner-help-card p,.scanner-empty p,.scanner-success p{font-size:12px;color:var(--muted);margin-bottom:20px}.scanner-video-wrap{position:relative;display:grid;place-items:center;min-height:330px;background:#183a39;border-radius:12px;overflow:hidden;color:#d7ede6}.scanner-video-wrap video,.scanner-video-wrap canvas{display:block;width:100%;max-height:570px;object-fit:contain}.scanner-video-wrap #scan-placeholder{position:absolute;max-width:260px;text-align:center;font-size:12px;line-height:1.6;margin:0;color:#d7ede6}.scanner-frame{position:absolute;width:76%;aspect-ratio:210/297;max-height:90%;border:2px solid #b4e6d8;border-radius:5px;box-shadow:0 0 0 999px #10282638;pointer-events:none}.scanner-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:17px}.scanner-status{min-height:20px;font-size:12px;color:#64817a;margin:15px 0 0}.scanner-status.error,.form-error{color:#b14e47}.scanner-help{display:grid;gap:18px}.scanner-help-card ol{margin:18px 0 20px;padding-left:22px;color:var(--muted);font-size:12px;line-height:1.8}.scanner-review-head{display:flex;justify-content:space-between;gap:18px;align-items:flex-start}.scanner-result-image{display:block;width:100%;max-height:380px;object-fit:contain;background:#eef3f1;border:1px solid var(--line);border-radius:10px;margin:18px 0 23px}.scanner-identity{display:grid;grid-template-columns:1fr 1fr;gap:15px;border-top:1px solid var(--line);padding-top:20px}.scanner-answer-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;margin-top:6px}.scanner-answer-row{display:flex;align-items:center;justify-content:space-between;gap:10px;min-height:43px;border:1px solid var(--line);border-radius:9px;padding:8px 10px;font-size:11px}.scanner-answer-row>span{white-space:nowrap}.scanner-answer-row b{margin-right:4px}.scanner-answer-row em{font-style:normal;font-size:9px;color:#9b6e24;background:#fff3df;border-radius:4px;padding:3px 5px;margin-left:5px}.scanner-options{display:flex;gap:7px;flex-wrap:wrap}.scanner-options label{display:flex;gap:3px;align-items:center}.scanner-options input{accent-color:var(--teal);margin:0}.scanner-text-row{grid-column:span 2;color:var(--muted)}.scanner-text-row small{font-size:10px;text-align:right}.scan-uncertain{border-color:#e6b161!important;background:#fff9ee}.scan-uncertain input{border-color:#dfac58!important}.scanner-review-actions{border-top:1px solid var(--line);padding-top:20px}.scanner-empty,.scanner-success{text-align:center}.scanner-success{max-width:560px;margin:auto}.scanner-score{font-size:42px!important;font-weight:700;color:var(--teal)!important;margin:16px 0 4px!important}.scanner-score span{font-size:18px;font-weight:500;color:var(--muted)}
@media(min-width:1600px){.content{padding-top:48px}.hero{padding-top:100px}.topbar{padding-right:60px}.sidebar{width:250px}.shell{grid-template-columns:250px 1fr}}
@media(max-width:1200px){.workspace-grid{grid-template-columns:1fr}.workspace-aside{display:grid;grid-template-columns:1fr 1fr;gap:20px}.aside-note{margin:0}.content,.topbar{padding-left:28px;padding-right:28px}.banner-step{width:85px}.hero h1{font-size:46px}.landing-feature{padding:60px 30px;gap:35px}.editor-grid{grid-template-columns:1fr 240px}}
@media(max-width:900px){.shell{grid-template-columns:185px 1fr}.sidebar{width:185px;padding:25px 12px}.brand{font-size:20px}.side-link{font-size:12px;gap:8px;padding:12px}.side-tip{padding:12px}.sidebar .brand{margin-left:3px}.content{padding:27px 24px}.topbar{height:70px;padding:0 24px}.top-right .badge{display:none}.stats{grid-template-columns:repeat(2,1fr)}.overview-banner{grid-template-columns:1fr;padding:24px}.banner-steps{display:none}.editor-grid{grid-template-columns:1fr}.editor-help{position:static}.empty-state-grid{grid-template-columns:repeat(2,1fr)}.hero{gap:22px;padding-top:45px}.hero h1{font-size:38px}.hero-visual{padding:25px 15px;min-height:400px}.mock-sheet{width:90%;padding:18px}.mock-phone{width:130px;right:10px}.mock-phone .phone-ring{width:65px;height:65px}.nav-links{gap:15px;font-size:12px}.auth-aside{padding:35px}.auth-aside h1{font-size:35px}.auth-form-wrap{padding:35px}.settings-grid{grid-template-columns:1fr}.page-head{align-items:flex-start}.page-head .actions{flex-wrap:wrap;justify-content:flex-end}.page-head h1{font-size:25px}}
@media(max-width:650px){.shell{display:block}.sidebar{position:relative;width:100%;height:auto;display:block;padding:14px 18px;border-right:0;border-bottom:1px solid var(--line)}.sidebar .brand{margin:0 0 15px}.workspace-label,.side-divider,.sidebar-bottom{display:none}.sidebar nav{display:flex;overflow:auto;gap:5px}.side-link{white-space:nowrap;display:flex;padding:9px 10px;width:auto;font-size:11px}.side-link .icon{width:16px}.side-link .count{display:none}.main{display:block}.topbar{height:50px;padding:0 20px}.top-right{font-size:10px}.content{padding:26px 18px}.page-head{flex-direction:column;gap:18px}.page-head .actions{justify-content:flex-start}.page-head h1{font-size:26px}.page-head p{font-size:12px}.overview-banner{padding:22px}.overview-banner h2{font-size:21px}.stats{gap:12px}.stat{padding:16px}.stat-number{font-size:25px}.workspace-aside{grid-template-columns:1fr}.toolbar{flex-wrap:wrap}.search-wrap{max-width:none;width:100%}.panel-title{padding:20px}.table-action .btn{padding:7px}.empty-state-grid{grid-template-columns:1fr}.form-row{grid-template-columns:1fr;gap:0}.editor-panel{padding:19px}.editor-card{padding:18px}.auth-page{display:block}.auth-aside{padding:25px}.auth-aside h1{font-size:24px;margin:24px 0 14px}.auth-aside p,.auth-aside>small{display:none}.auth-form-wrap{padding:35px 25px}.landing nav{height:75px;padding:0 20px}.nav-links>a:not(.btn){display:none}.nav-links{gap:6px}.nav-links .btn{padding:9px 10px;font-size:11px}.hero{grid-template-columns:1fr;padding:35px 22px 55px;gap:35px}.hero h1{font-size:43px}.hero p{font-size:15px}.hero-visual{min-height:360px;margin:0 8px}.mock-sheet{width:75%}.mock-phone{right:25px;bottom:22px;width:140px}.flow-grid{grid-template-columns:1fr;gap:17px}.flow-item{display:grid;grid-template-columns:40px 1fr;column-gap:15px}.flow-number{grid-row:span 2;margin:0}.flow-item h3{font-size:17px;margin-bottom:9px}.flow-item p{font-size:13px}.section-inner>h2{font-size:28px}.landing-feature{grid-template-columns:1fr;gap:30px;padding:50px 25px}.landing-feature h2{font-size:29px}.planned-section{padding:45px 25px}.planned-section h2{font-size:28px}.landing footer{padding:30px 25px;flex-direction:column;gap:15px}.settings-card{padding:21px}.breadcrumb{font-size:11px}}
@media(max-width:900px){.scanner-layout,.scanner-review-layout{grid-template-columns:1fr}.scanner-help{grid-template-columns:1fr 1fr}.scanner-camera,.scanner-review{padding:21px}}
@media(max-width:650px){.scanner-help{grid-template-columns:1fr}.scanner-video-wrap{min-height:280px}.scanner-actions .btn{flex:1}.scanner-identity,.scanner-answer-list{grid-template-columns:1fr}.scanner-text-row{grid-column:span 1}.scanner-review-head{display:grid}.scanner-result-image{max-height:300px}}
.workspace-grid>*{min-width:0}.panel{min-width:0}.sheet-preview{border:1px solid var(--line);background:white;max-width:390px;margin:0 auto}.sheet-preview svg{width:100%;height:auto}
[hidden]{display:none!important}
#scan-batches{display:grid;gap:10px;margin-top:20px}
.scanner-status{min-height:3em;font-size:17px!important;font-weight:600}
.scanner-answer-row>.btn{min-height:44px}

/* A batch row has identity, review reasons and two actions. Keep every action
   reachable on a phone rather than clipping it after a long identity label. */
.scanner-batch-review .scanner-answer-list{grid-template-columns:1fr}
.scanner-batch-review .scanner-answer-row{display:grid;grid-template-columns:minmax(0,1fr) auto auto;font-size:13px;line-height:1.5}
.scanner-batch-review .scanner-answer-row>span{white-space:normal;overflow-wrap:anywhere}
@media(max-width:650px){
  .scanner-batch-review .scanner-answer-row{grid-template-columns:1fr 1fr;font-size:14px}
  .scanner-batch-review .scanner-answer-row>span{grid-column:1/-1}
  .scanner-batch-review .scanner-answer-row>.btn{width:100%;white-space:normal}
}
@page{size:A4;margin:0}
@media print{html,body{background:white!important;color:black}#app,#toast,#modal{display:none!important}#print-area{display:block!important}.print-sheet{width:210mm;height:297mm;page-break-after:always;break-after:page;position:relative;overflow:hidden}.print-sheet:last-child{page-break-after:auto}.print-sheet svg{width:210mm;height:297mm}.print-questions{padding:18mm;min-height:297mm;break-after:page;font:11pt Arial,sans-serif}.print-questions h1{font-size:20pt;letter-spacing:0}.print-question{break-inside:avoid;margin:8mm 0}.print-question h3{font-size:11pt;white-space:pre-wrap}.print-question p{font-size:10pt;margin:2mm 0;white-space:pre-wrap}.print-open{height:20mm;border-bottom:1px solid #999}.print-instructions{white-space:pre-wrap;font-size:10pt}.print-question .points{font-size:9pt;color:#555}}

/* The camera surface has one absolute media layer. Previously a hidden canvas
   could still participate in the grid and make the preview look cut in half. */
.scanner-video-wrap{display:block;height:clamp(300px,50vh,460px);min-height:0}
.scanner-video-wrap video,.scanner-video-wrap canvas{position:absolute;inset:0;width:100%;height:100%;max-height:none;object-fit:contain}
.scanner-video-wrap [hidden]{display:none!important}
.scanner-frame{width:min(72%,310px);aspect-ratio:var(--scan-sheet-ratio,210 / 297);max-height:86%}
.sheet-preview .omr-card{display:block;max-height:520px;margin:auto}
.platform-panel{padding:24px;margin-bottom:22px}.platform-panel h2{font-size:20px;line-height:1.35;margin-bottom:18px}.platform-panel p{font-size:14px;line-height:1.6}.platform-panel .actions{display:flex;gap:10px;flex-wrap:wrap}.quick-actions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-bottom:26px}.quick-card{text-align:left;display:grid;grid-template-columns:1fr auto;gap:12px;background:white;border:1px solid var(--line);padding:24px;border-radius:15px;color:var(--ink)}@media(hover:hover) and (pointer:fine){.quick-card:hover{border-color:var(--teal);background:#f3faf6}}.quick-card b{font-size:19px;grid-column:1}.quick-card small{font-size:13px;color:var(--muted);grid-column:1}.quick-number{font-size:12px;color:var(--teal);grid-column:1}.quick-card>span:last-child{grid-row:2;grid-column:2;font-size:24px;color:var(--teal)}.platform-columns{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.platform-columns>*{min-width:0}.platform-list-row{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:16px 0;border-top:1px solid var(--line)}.platform-list-row b{font-size:14px}.platform-list-row small{display:block;font-size:12px;color:var(--muted);margin-top:7px;line-height:1.5}.platform-list-row .btn{flex-shrink:0}.pending-actions{display:grid;gap:10px}.pending-action{display:flex;align-items:center;gap:12px;border:1px solid var(--line);background:#f7faf8;padding:16px;border-radius:10px;text-align:left;font-size:14px;color:var(--ink)}.pending-action>b{margin-left:auto}.work-nav{display:flex;gap:10px;flex-wrap:wrap;margin:0 0 24px}.platform-card-meta{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.library-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.library-filters{padding:0 0 20px;display:flex;gap:12px}.library-filters input,.library-filters select{border:1px solid var(--line);border-radius:8px;padding:12px;font-size:14px;min-width:0}.library-filters input{flex:1}.run-code{font:600 22px Consolas,monospace;letter-spacing:2px;background:#eef6f1;padding:18px;border-radius:10px;overflow-wrap:anywhere;user-select:all}.source-fragment{margin-top:16px;border:1px solid var(--line);padding:13px;border-radius:8px;font-size:13px}.source-fragment summary{cursor:pointer}.source-fragment blockquote{white-space:pre-wrap;border-left:3px solid var(--teal);padding:8px 14px;margin:12px 0 0;background:#f5faf7;line-height:1.6}.question-metadata{margin-top:15px}.question-metadata summary{cursor:pointer;font-size:13px;margin-bottom:12px}.math-preview{padding:12px;margin-top:12px;border:1px solid var(--line);border-radius:8px;line-height:1.8}.math-preview>div{margin-top:8px}.check-label{display:flex;align-items:flex-start;gap:10px;line-height:1.5}.check-label input{width:19px;height:19px;flex-shrink:0;accent-color:var(--teal)}math{font-size:1.12em;overflow:visible;vertical-align:middle}.math-scroll{display:inline-block;max-width:100%;overflow-x:auto;overflow-y:hidden;vertical-align:middle;padding-block:2px}.formula-raw{overflow-wrap:anywhere}.report-summary{display:flex;gap:26px;padding:20px 0}.report-summary b{display:block;font-size:28px;color:var(--teal)}.report-topic{display:grid;grid-template-columns:1fr auto;gap:8px;margin:18px 0}.report-topic progress{grid-column:1/-1;width:100%;height:12px;accent-color:var(--teal)}.mode-options{display:flex;gap:10px;flex-wrap:wrap}.mode-options label{padding:12px;border:1px solid var(--line);border-radius:8px;cursor:pointer}.mode-options input{accent-color:var(--teal)}.code-cards{display:grid;grid-template-columns:1fr 1fr;gap:12px}.code-cards>div{border:1px dashed #888;padding:14px;break-inside:avoid}
.participation-page{max-width:760px;margin:auto;padding:24px 18px 60px}.participation-login{max-width:480px;margin:45px auto}.participation-login h1{font-size:28px}.participation-header{display:flex;justify-content:space-between;align-items:center;gap:20px;background:white;border:1px solid var(--line);padding:18px;border-radius:13px;position:sticky;top:8px;z-index:5;margin-bottom:22px}.participation-header b{font-size:17px}.participation-header small{display:block;margin-top:6px;font-size:13px;color:var(--muted)}#participation-time{font:600 24px Consolas,monospace;white-space:nowrap;color:var(--teal)}.time-short{color:#aa4a35!important}.participation-rules p{font-size:14px}.participation-question h2{font-size:18px;margin:18px 0}.student-option{display:flex;gap:12px;align-items:flex-start;cursor:pointer;border:1px solid var(--line);border-radius:9px;margin:10px 0;padding:15px;font-size:16px;line-height:1.5}.student-option:has(input:checked){border-color:var(--teal);background:#eef8f2}.student-option input{width:20px;height:20px;flex-shrink:0;accent-color:var(--teal);margin-top:2px}.participation-footer{display:flex;justify-content:space-between;align-items:center;gap:15px}.participation-footer p{font-size:13px}.participation-page .field input,.participation-page .field textarea{font-size:16px}.scanner-text-row input{min-width:100px;max-width:200px;padding:10px;border:1px solid var(--line);border-radius:6px}.btn{min-height:42px}.side-link{font-size:13px}.field label,.field-label{font-size:13px}.field input,.field textarea,.field select{font-size:14px}.field small{font-size:12px}.notice{font-size:13px}.form-error{font-size:13px}
@media(max-width:1000px){.platform-columns,.library-grid{grid-template-columns:1fr}.quick-actions{gap:10px}.quick-card{padding:18px}.quick-card b{font-size:16px}}
@media(max-width:650px){.quick-actions{grid-template-columns:1fr}.quick-card{grid-template-columns:32px 1fr auto;gap:7px 12px;padding:17px}.quick-number{grid-column:1;grid-row:1/3}.quick-card b,.quick-card small{grid-column:2}.quick-card>span:last-child{grid-column:3;grid-row:1/3}.platform-panel{padding:19px}.platform-list-row{flex-wrap:wrap}.library-filters{flex-wrap:wrap}.library-filters input,.library-filters select{width:100%}.work-nav .btn{flex:1}.participation-footer{flex-direction:column;align-items:stretch}.participation-header b{font-size:15px}.code-cards{grid-template-columns:1fr}.scanner-text-row{flex-wrap:wrap}.participation-page{padding-top:16px}}
@media print{.code-cards{grid-template-columns:1fr 1fr}.code-cards p{font-size:10pt}.code-cards>div{min-height:27mm}.print-question math{font-size:1em}}
@media(max-width:650px){.scanner-video-wrap{height:min(66vh,440px)}.scanner-frame{width:78%;max-height:85%}}

.report-filters{display:grid;grid-template-columns:minmax(180px,2fr) repeat(4,minmax(115px,1fr));gap:14px;align-items:end;margin-bottom:20px}
.reports-table td,.reports-table th,#report-students td,#report-students th{font-size:13px;line-height:1.5}
.reports-table .text-link{font-size:15px;font-weight:600;text-align:left;line-height:1.5}
.reports-table time{white-space:nowrap}.reports-table .subtext{max-width:300px;font-size:12px}
.report-summary-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:18px}
.report-summary-cards .panel{padding:22px}.report-summary-cards b{display:block;font-size:30px;color:var(--teal);margin-bottom:6px}.report-summary-cards span{color:var(--muted);font-size:13px}
.report-note{font-size:13px;line-height:1.7;margin-bottom:22px}.report-tabs{margin-bottom:20px;overflow-x:auto}
.report-tabs .tab-button{font-size:14px;white-space:nowrap}.report-student-toolbar{display:flex;align-items:center;gap:20px;flex-wrap:wrap;margin-bottom:20px}.report-student-toolbar h2{margin:0;flex:1}.report-student-toolbar .field{margin:0;min-width:160px}.report-student-toolbar .check-label{font-size:13px}
.report-percent{min-width:110px}.report-percent progress,.report-topic-detail progress{display:block;width:100%;height:9px;margin-top:6px;accent-color:var(--teal)}
.report-question{border-top:1px solid var(--line);padding:20px 0}.report-question>div:first-child{display:flex;align-items:start;gap:12px;flex-wrap:wrap}.report-question b{font-size:15px;line-height:1.6}.report-question .subtext{width:100%;padding-left:38px}.report-question-stats{display:flex;flex-wrap:wrap;gap:20px;margin:12px 0 0 38px;font-size:13px;color:var(--muted)}.report-question-stats b{font-size:13px;color:var(--ink)}
.report-topic-detail{display:grid;grid-template-columns:1fr 170px;gap:25px;padding:20px 0;border-top:1px solid var(--line)}.report-topic-detail h3{font-size:15px;margin-bottom:8px}.report-topic-detail p{color:var(--muted);font-size:13px;line-height:1.6}.report-topic-detail>div:last-child{align-self:center}.report-topic-detail small{display:block;margin-top:8px;font-size:12px;color:var(--muted)}
.report-empty{padding:38px 20px;text-align:center}.report-empty h2{font-size:20px}.report-empty p{font-size:14px;line-height:1.7;max-width:580px;margin:15px auto 22px;color:var(--muted)}
.report-matrix{margin-top:25px;border-top:1px solid var(--line);padding-top:20px}.report-matrix summary{font-size:14px;font-weight:600;cursor:pointer}.report-matrix p{margin:15px 0;font-size:12px}.report-matrix th:first-child{position:sticky;left:0;background:white;z-index:1;min-width:150px}.report-matrix td{text-align:center;min-width:42px;font-weight:600}.report-matrix .matrix-correct{background:#edf8f1;color:#27734a}.report-matrix .matrix-incorrect{background:#fff0ec;color:#a63f2b}.report-matrix .matrix-pending,.report-matrix .matrix-partial{background:#fff7df;color:#85611b}.report-matrix .matrix-blank{color:var(--muted)}
[role=tabpanel][hidden]{display:none}.icon-btn.danger{color:#a24b3c}@media(hover:hover) and (pointer:fine){.icon-btn.danger:hover{background:#fff0ec}}
.curriculum-picker{margin:18px 0}.curriculum-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:14px}.curriculum-grid>.field{min-width:0}.curriculum-picker select{min-width:0;width:100%;text-overflow:ellipsis}.curriculum-source{font-size:12px;line-height:1.7;color:var(--muted);margin-bottom:20px}.curriculum-source a{color:var(--teal);text-decoration:underline}.curriculum-status{font-size:13px;padding:15px;background:#f5f8f6;border-radius:8px}.curriculum-source a{overflow-wrap:anywhere}.curriculum-topic{grid-column:1/-1}
@media(max-width:1100px){.report-filters{grid-template-columns:repeat(3,minmax(140px,1fr))}.report-summary-cards{gap:12px}}
@media(max-width:650px){.report-filters,.curriculum-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}.report-filters>.field:first-child{grid-column:1/-1}.report-summary-cards{grid-template-columns:1fr 1fr}.report-summary-cards .panel{padding:17px}.report-summary-cards b{font-size:26px}.report-topic-detail{grid-template-columns:1fr}.report-student-toolbar{align-items:start;gap:14px}.report-student-toolbar h2{flex-basis:100%}.report-student-toolbar .field{flex:1}.report-question-stats{margin-left:0;gap:12px}.curriculum-grid .field select{max-width:100%}}
.class-name-fields{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.class-roster-import{border:1px solid var(--line);border-radius:10px;padding:16px;margin:18px 0}
.class-roster-import>small{display:block;margin-top:10px;font-size:12px;line-height:1.6;color:var(--muted)}
#class-roster-status{font-size:13px;line-height:1.6;margin-top:12px}
#class-roster-preview details{font-size:13px;margin:12px 0}#class-roster-preview ol{max-height:200px;overflow-y:auto;padding-left:25px;line-height:1.8}
.roster-warnings{font-size:13px;line-height:1.6;color:#85611b;padding-left:20px}
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.class-roster-import:has(input:focus-visible)>label{outline:2px solid var(--teal);outline-offset:3px}
@media(max-width:650px){.class-roster-import .btn{max-width:100%;white-space:normal;text-align:center}.class-name-fields{gap:10px}}

/* Live capture feedback remains readable while image processing is running. */
.scanner-video-wrap{container-type:size}
.scanner-frame{left:50%;top:50%;transform:translate(-50%,-50%);width:min(86%,600px);max-width:86%;max-height:78%;transition:border-color .2s ease,box-shadow .2s ease}
@supports(width:1cqw){.scanner-frame{width:min(86cqw,calc(78cqh * var(--scan-sheet-ratio,210 / 297)));max-height:none}}
.scan-feedback-count{position:absolute;top:12px;right:12px;z-index:4;padding:8px 12px;border:1px solid #ffffff35;border-radius:999px;background:#102826e8;color:#fff;font-size:13px;font-weight:600;font-variant-numeric:tabular-nums;pointer-events:none}
.scan-feedback-caption{position:absolute;left:12px;right:12px;bottom:12px;z-index:4;padding:12px 16px;border:1px solid #ffffff25;border-radius:10px;background:#102826e8;color:#fff;pointer-events:none;text-align:center;box-shadow:0 4px 18px #0002}
.scan-feedback-status{display:grid;gap:4px;line-height:1.4}.scan-feedback-status strong{font-size:15px;color:#fff}.scan-feedback-status span{font-size:12px;color:#e5f3ef}
.scan-feedback-progress{height:4px;overflow:hidden;margin-top:10px;background:#ffffff35;border-radius:999px}.scan-feedback-progress[hidden]{display:none!important}.scan-feedback-progress>span{display:block;width:0;height:100%;border-radius:inherit;background:#8de6c1;transition:none}.scan-feedback-progress[data-indeterminate=true]>span{width:35%!important;animation:scan-feedback-progress 1.15s ease-in-out infinite}
.scan-feedback-confirmation{position:absolute;left:50%;top:43%;z-index:3;width:clamp(86px,16vw,126px);height:clamp(86px,16vw,126px);transform:translate(-50%,-50%) scale(.75);opacity:0;pointer-events:none;filter:drop-shadow(0 6px 18px #0005);transition:opacity .12s ease,transform .18s ease}
.scan-feedback-check{width:100%;height:100%;overflow:visible}.scan-feedback-check-circle{fill:#f1fff6;stroke:#24b76c;stroke-width:5;stroke-dasharray:271;stroke-dashoffset:0}.scan-feedback-check-mark{fill:none;stroke:#15904c;stroke-width:7;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:70;stroke-dashoffset:0}
.scanner-video-wrap[data-scan-state=steady] .scanner-frame{border-color:#8de6c1;box-shadow:0 0 0 999px #10282638,0 0 20px #8de6c13b}
.scanner-video-wrap[data-scan-state=processing] .scanner-frame{border-color:#b5dce8}
.scanner-video-wrap[data-scan-state=captured] .scanner-frame{border-color:#5dff9d;box-shadow:0 0 0 999px #10282628,0 0 0 4px #5dff9d40,0 0 38px #5dff9d99}
.scanner-video-wrap[data-scan-state=captured] .scan-feedback-caption{background:#124e32f2;border-color:#6aedaa80}
.scanner-video-wrap:is([data-scan-state=captured],[data-scan-state=offline]) .scan-feedback-confirmation{opacity:1;transform:translate(-50%,-50%) scale(1)}
.scanner-video-wrap:is([data-scan-state=captured],[data-scan-state=offline]) .scan-feedback-check-circle{animation:scan-feedback-circle-a .38s ease-out both}.scanner-video-wrap:is([data-scan-state=captured],[data-scan-state=offline]) .scan-feedback-check-mark{animation:scan-feedback-check-a .28s .22s ease-out both}
.scanner-video-wrap.scan-capture-alternate:is([data-scan-state=captured],[data-scan-state=offline]) .scan-feedback-check-circle{animation-name:scan-feedback-circle-b}.scanner-video-wrap.scan-capture-alternate:is([data-scan-state=captured],[data-scan-state=offline]) .scan-feedback-check-mark{animation-name:scan-feedback-check-b}
.scanner-video-wrap[data-scan-state=offline] .scanner-frame{border-color:#ffd37d;box-shadow:0 0 0 999px #10282628,0 0 28px #ffd37d70}.scanner-video-wrap[data-scan-state=offline] .scan-feedback-caption{background:#574319f2;border-color:#ffd37d80}.scanner-video-wrap[data-scan-state=offline] .scan-feedback-check-circle{stroke:#d8a536}.scanner-video-wrap[data-scan-state=offline] .scan-feedback-check-mark{stroke:#a77c16}
.scanner-video-wrap[data-scan-state=error] .scanner-frame{border-color:#ffb29e;box-shadow:0 0 0 999px #10282638,0 0 20px #ffb29e35}.scanner-video-wrap[data-scan-state=error] .scan-feedback-caption{background:#662f27f2;border-color:#ffb29e70}
@keyframes scan-feedback-circle-a{from{stroke-dashoffset:271}to{stroke-dashoffset:0}}@keyframes scan-feedback-circle-b{from{stroke-dashoffset:271}to{stroke-dashoffset:0}}@keyframes scan-feedback-check-a{from{stroke-dashoffset:70}to{stroke-dashoffset:0}}@keyframes scan-feedback-check-b{from{stroke-dashoffset:70}to{stroke-dashoffset:0}}
@keyframes scan-feedback-progress{from{transform:translateX(-110%)}to{transform:translateX(390%)}}@keyframes scan-feedback-frame{50%{border-color:#edf9ff;box-shadow:0 0 0 999px #10282638,0 0 24px #b5dce84d}}
@media(max-width:650px){.scan-feedback-caption{left:8px;right:8px;bottom:8px;padding:10px 12px}.scan-feedback-status strong{font-size:14px}.scan-feedback-status span{font-size:12px}.scan-feedback-count{top:8px;right:8px;padding:7px 10px}.scan-feedback-confirmation{top:40%}}
@media(prefers-reduced-motion:reduce){.scanner-frame,.scan-feedback-confirmation,.scan-feedback-progress>span{transition:none!important;animation:none!important}.scan-feedback-check-circle,.scan-feedback-check-mark{animation:none!important;stroke-dashoffset:0!important}.scan-feedback-progress[data-indeterminate=true]>span{width:100%!important;opacity:.75}}

/* Fit the whole native camera image, including portrait video after a phone
   turn. Geometry comes from the video, never from the screen orientation. */
.scanner-video-wrap{width:100%;height:auto;aspect-ratio:var(--scan-video-ratio,16 / 10);min-height:180px;max-height:min(74vh,760px)}
@supports(height:1svh){.scanner-video-wrap{max-height:min(74svh,760px)}}
.scanner-frame{width:var(--scan-frame-width,86%);height:var(--scan-frame-height,auto);max-width:none;max-height:none;aspect-ratio:var(--scan-sheet-ratio,198 / 116)}

/* Keep the live instructions and progress visible without hiding the lower
   corner marks. Capture animation and saved-image count stay over the video. */
.scanner-camera>.scan-feedback-caption{position:relative;inset:auto;margin-top:10px;border-color:#d0e0da;background:#183a39;box-shadow:none}
.scanner-camera>.scan-feedback-caption[data-scan-state=captured]{background:#124e32;border-color:#6aedaa80}
.scanner-camera>.scan-feedback-caption[data-scan-state=offline]{background:#574319;border-color:#ffd37d80}
.scanner-camera>.scan-feedback-caption[data-scan-state=error]{background:#662f27;border-color:#ffb29e70}

/* Teacher workspace: readable controls and a short, persistent phone navigation.
   Screen-only rules leave printed answer sheets and their geometry unchanged. */
@media screen{
  :root{--muted:#526963}
  .shell{font-size:16px;line-height:1.5}
  .shell .btn,dialog .btn{min-height:44px;font-size:15px}
  .shell .icon-btn,dialog .icon-btn{min-width:44px;min-height:44px;display:inline-grid;place-items:center}
  .shell :is(button,a,input,select,textarea):focus-visible,dialog :is(button,a,input,select,textarea,summary):focus-visible{outline:3px solid var(--teal-dark);outline-offset:3px}
  .shell .page-head p,.shell .empty p,.shell .field small,.shell .notice,dialog .field small{font-size:14px;color:var(--muted)}
  .shell .field label,.shell .field-label,dialog .field label,dialog .field-label{font-size:14px}
  .shell .field :is(input,select,textarea),dialog .field :is(input,select,textarea){font-size:16px;min-height:44px}
  .shell :is(.tab-button,.text-link){font-size:14px;min-height:44px}
  .shell .search-wrap input{font-size:16px;min-height:44px}
  .shell .search-wrap .icon{top:14px}
  .shell table{font-size:14px}
  .shell th{font-size:13px;color:var(--muted);font-weight:600}
  .shell td .subtext{font-size:13px}
  .shell .badge{font-size:12px}
  .shell .badge.draft{color:#55625a}
  .shell :is(.stat-top,.stat small,.bottom-hint){font-size:13px;color:var(--muted)}
  .shell :is(.checklist-item b,.checklist-item p,.aside-note p,.side-panel h3){font-size:14px}
  .sidebar{padding:24px 18px}
  .sidebar .brand{margin:0 0 24px 9px;flex-shrink:0}
  .sidebar nav{min-height:0;overflow-y:auto;overscroll-behavior:contain;flex:1}
  .workspace-label{font-size:11px;color:var(--muted);letter-spacing:1px;margin:8px 12px}
  .sidebar .side-link,.more-navigation .side-link{font-size:15px;color:var(--muted);min-height:44px;padding:10px 12px;gap:11px;line-height:1.35}
  .sidebar .side-link.active,.more-navigation .side-link.active{color:var(--teal-dark)}
  .side-link .count{font-size:12px;min-width:24px}
  .side-divider{margin:16px 12px}
  .sidebar-bottom{flex-shrink:0;padding-top:12px;margin-top:12px;border-top:1px solid var(--line)}
  .profile{padding:0;gap:8px}
  .profile-text b{font-size:13px}.profile-text span{font-size:12px}
  .profile button{min-width:44px;min-height:44px}
  .breadcrumb{color:var(--muted);font-size:13px;min-width:0}
  .top-right{font-size:13px}
  .mobile-nav,.mobile-home{display:none}
  .more-navigation{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
  .more-navigation .side-link{width:100%;margin:0;background:#f5f8f7;white-space:normal}
  .more-navigation .side-link.active{background:var(--mint)}
  .more-account{display:grid;gap:4px;border-top:1px solid var(--line);padding-top:18px;margin-top:22px;overflow-wrap:anywhere}
  .more-account>span{color:var(--muted);font-size:14px}
  .more-account .btn{justify-self:start;margin-top:10px}
}
@media screen and (max-width:850px){
  .shell{display:block}
  .shell>.sidebar{display:none}
  .shell>.main{display:block}
  .shell .topbar{height:64px;padding:8px 18px;gap:12px;background:white}
  .shell .breadcrumb,.shell .topbar-date,.shell .top-right>.badge{display:none}
  .shell .top-right{margin-left:auto;gap:8px;min-width:0}
  .mobile-home{display:flex;align-items:center;gap:9px;border:0;background:transparent;color:var(--ink);font-size:20px;font-weight:700;min-height:44px;padding:0;letter-spacing:-.5px}
  .mobile-home .brand-mark{width:32px;height:32px}
  .shell .content{padding:24px 18px calc(100px + env(safe-area-inset-bottom,0px));max-width:850px}
  .mobile-nav{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));position:fixed;left:0;right:0;bottom:0;z-index:30;gap:3px;padding:7px max(6px,env(safe-area-inset-right,0px)) calc(7px + env(safe-area-inset-bottom,0px)) max(6px,env(safe-area-inset-left,0px));background:#fff;border-top:1px solid #d0ded8;box-shadow:0 -3px 16px #1933350a}
  .mobile-nav-link{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;min-width:0;min-height:56px;border:0;border-radius:10px;background:transparent;color:var(--muted);padding:6px 1px;font-size:12px;line-height:1.2;font-weight:600}
  .mobile-nav-link.active{background:var(--mint);color:var(--teal-dark)}
  .mobile-nav-link .icon{width:22px;height:22px}
  .mobile-nav-link .count{position:absolute;top:2px;left:calc(50% + 7px);border-radius:10px;min-width:18px;padding:1px 4px;background:white;color:var(--teal-dark);font-size:10px;line-height:1.4}
  .shell :is(.tab-button,.text-link){min-height:44px}
  .shell :is(input:not([type=checkbox]):not([type=radio]),select,textarea),dialog :is(input:not([type=checkbox]):not([type=radio]),select,textarea){font-size:16px;min-height:44px}
  dialog .modal-header .btn{min-width:44px}
  #toast{bottom:calc(88px + env(safe-area-inset-bottom,0px));left:18px;right:18px;max-width:500px;margin-left:auto;font-size:14px}
}
@media screen and (max-width:360px){.mobile-nav-link{font-size:11px}.more-navigation{grid-template-columns:1fr}}
@media print{.mobile-nav,.mobile-home{display:none!important}}
@media print{.math-scroll{display:inline;max-width:none;overflow:visible;padding:0}}
.question-images{display:flex;flex-wrap:wrap;gap:16px;margin:14px 0;max-width:100%;break-inside:avoid}
.question-image{display:block;max-width:100%;max-height:360px;object-fit:contain;background:#fff;border-radius:8px}
@media print{.question-image{max-height:85mm;border-radius:0}.question-images{gap:4mm;margin:3mm 0}}
.matching-editor-lists{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(0,1fr);gap:24px;margin:18px 0}.matching-editor-lists h3{font-size:16px;margin:0 0 14px}.matching-editor-row{display:grid;grid-template-columns:minmax(0,1fr) 110px 90px;gap:10px;padding:12px 0;border-bottom:1px solid var(--line);margin-bottom:12px}.matching-editor-row .field,.matching-editor-right .field{margin-bottom:0}.matching-editor-row .matching-remove{grid-column:1/-1;justify-self:start}.matching-editor-right{display:flex;align-items:end;gap:10px;margin-bottom:14px}.matching-editor-right .field{flex:1;min-width:0}.matching-editor .matching-remove{min-height:40px}.matching-answer{display:grid;gap:16px;margin:16px 0}.matching-answer-right{padding:14px 18px;background:var(--mint);border-radius:12px}.matching-answer-right ol{margin:10px 0 0;padding-left:24px}.matching-answer-right li{padding:4px 0;overflow-wrap:anywhere}.matching-answer-pairs{display:grid;gap:12px}.matching-answer-pair{display:grid;grid-template-columns:minmax(0,1fr) 110px;gap:8px 14px;align-items:center}.matching-answer-pair label{font-size:15px;line-height:1.5;overflow-wrap:anywhere}.matching-answer-pair select{width:100%;min-height:44px;padding:10px;border:1px solid var(--line);border-radius:10px;font:inherit;background:var(--white);color:var(--ink)}.matching-answer-key{grid-column:1/-1;color:var(--muted);font-size:13px}.matching-scoring-note{margin:0;font-size:13px}.matching-incomplete-key{margin:18px 0}
@media(max-width:800px){.matching-editor-lists{grid-template-columns:1fr}.matching-editor-row{grid-template-columns:minmax(0,1fr) 110px}.matching-editor-row>.field:first-child{grid-column:1/-1}.matching-editor-row .matching-remove{grid-column:auto;align-self:end;min-height:44px}.matching-answer-pair{grid-template-columns:minmax(0,1fr) 100px}}