:root{--bg:#f5f7fb;--paper:#fff;--ink:#1d2c42;--muted:#7c879b;--line:#e7ebf3;--blue:#365ce8;--blue-soft:#edf1ff;--green:#1a8b6a;--green-soft:#e9f7f1;--red:#c64a4a;--radius:20px;font-family:Inter,"Microsoft YaHei","PingFang SC",system-ui,sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,input,textarea{font:inherit}button,a,input{ -webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.55}a{color:inherit;text-decoration:none}a:hover{color:var(--blue)}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #9cb1ff;outline-offset:3px}[hidden]{display:none!important}.topbar{height:90px;max-width:1320px;margin:auto;padding:0 46px;display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{display:flex;align-items:center;gap:12px;font-weight:750;letter-spacing:.02em;font-size:20px}.brand-mark{width:36px;height:36px;display:grid;place-items:center;color:white;font-size:18px;border-radius:11px;background:var(--blue);box-shadow:0 6px 14px #365ce825}.brand-sub{font-size:12px;font-weight:400;color:var(--muted);margin-left:10px;letter-spacing:.03em}.subtle-link{font-size:13px;color:#68758b;white-space:nowrap}.site-footer{max-width:1228px;margin:40px auto 0;padding:24px 0 30px;display:flex;justify-content:space-between;color:#929bad;font-size:12px;border-top:1px solid var(--line)}.loading{padding:100px 20px;text-align:center;color:var(--muted)}.landing{max-width:1228px;margin:35px auto 0;display:grid;grid-template-columns:minmax(0,1fr) 420px;gap:85px;align-items:center;padding:35px 35px 30px}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-size:12px;font-weight:700;letter-spacing:.1em}.eyebrow:before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor}.hero h1{font-size:48px;line-height:1.25;letter-spacing:-.04em;margin:22px 0 20px;font-weight:800}.hero h1 span{color:var(--blue)}.hero-copy{color:#7c8797;font-size:15px;line-height:1.95;max-width:470px;white-space:pre-line}.exam-name{font-size:18px;font-weight:700;margin-top:27px;overflow-wrap:anywhere}.meta-row{display:flex;gap:38px;margin-top:28px;padding-top:24px;border-top:1px solid #e0e6ef}.meta-value{font-size:27px;font-weight:750;letter-spacing:-1px}.meta-value small{font-size:12px;font-weight:400;color:var(--muted);margin-left:5px;letter-spacing:0}.meta-label{font-size:11px;color:var(--muted);margin-top:6px}.journey{display:flex;align-items:center;gap:12px;color:#8290a4;font-size:11px;margin-top:40px}.journey b{display:grid;place-items:center;width:23px;height:23px;background:#e8edf7;border-radius:50%;color:#64748b;font-size:10px}.journey .dash{width:22px;height:1px;background:#d5ddeb}.entry-card,.panel{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius)}.entry-card{padding:34px 32px;box-shadow:0 16px 50px #27396808;position:relative;overflow:hidden}.entry-card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--blue)}.entry-title{display:flex;justify-content:space-between;align-items:center;margin-bottom:7px}.entry-title h2{font-size:23px;margin:0}.pill{border-radius:6px;background:var(--green-soft);color:var(--green);padding:5px 9px;font-size:10px;font-weight:700}.entry-sub{color:var(--muted);font-size:12px;line-height:1.8;margin:0 0 25px}.field{margin-bottom:18px}.field label{display:block;font-size:12px;font-weight:650;margin-bottom:9px}.field input{width:100%;border:1px solid #e2e7f0;border-radius:9px;background:#fafbfe;padding:13px 14px;font-size:14px;outline:none;transition:.2s}.field input:focus{border-color:var(--blue);background:#fff;box-shadow:0 0 0 3px #365ce810}.field input::placeholder{color:#adb5c2}.field-hint{color:var(--muted);font-size:11px;line-height:1.7;margin-top:6px}.btn{border:1px solid transparent;border-radius:9px;padding:12px 18px;font-size:13px;font-weight:650;display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:43px;transition:.15s}.btn.primary{background:var(--blue);color:#fff;box-shadow:0 4px 10px #365ce81a}.btn.primary:hover{background:#2449d2}.btn.secondary{background:#fff;border-color:#e0e6ef;color:#526079}.btn.secondary:hover{background:#f5f7fc}.btn.full{width:100%}.btn.small{min-height:35px;padding:8px 13px;font-size:12px}.entry-notice{border-top:1px solid var(--line);padding-top:19px;margin:22px 0 0;color:#929bac;font-size:11px;line-height:1.9}.form-error{font-size:12px;line-height:1.6;color:var(--red);min-height:18px;margin:8px 0}.workspace{max-width:1228px;margin:20px auto;padding:0 10px}.exam-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin:18px 0 26px}.exam-heading h1{font-size:27px;margin:10px 0 8px;overflow-wrap:anywhere}.exam-heading p{font-size:12px;color:var(--muted);margin:0;line-height:1.8}.student-badge{display:flex;align-items:center;gap:10px;font-size:12px}.avatar{display:grid;place-items:center;border-radius:50%;width:36px;height:36px;background:var(--blue-soft);color:var(--blue);font-weight:700}.student-badge small{display:block;color:var(--muted);margin-top:4px;font-size:10px}.exam-layout{display:grid;grid-template-columns:250px minmax(0,1fr);gap:24px;align-items:start}.answer-sidebar{position:sticky;top:20px}.timer-panel{padding:24px;background:var(--blue);color:white;border:0}.timer-label{font-size:11px;color:#d8e0ff;letter-spacing:.04em}.timer{font-size:38px;letter-spacing:.04em;font-variant-numeric:tabular-nums;font-weight:750;margin:8px 0}.timer-caption{font-size:10px;color:#d8e0ff;line-height:1.7}.timer-panel.urgent{background:#b94a4a}.nav-panel{margin-top:16px;padding:22px}.nav-header{display:flex;align-items:center;justify-content:space-between;font-size:12px;font-weight:650}.nav-header span{font-weight:400;color:var(--muted);font-size:11px}.progress-track{height:4px;border-radius:4px;background:#edf0f6;overflow:hidden;margin:14px 0 20px}.progress-fill{height:4px;background:var(--blue);width:0;transition:width .2s}.number-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:7px}.number-grid button{border:1px solid var(--line);border-radius:7px;aspect-ratio:1;background:#fff;font-size:11px;color:#8490a2}.number-grid button.answered{background:var(--blue-soft);color:var(--blue);border-color:#d7e0ff}.number-grid button.current{background:var(--blue);color:#fff;border-color:var(--blue)}.legend{display:flex;gap:15px;font-size:10px;color:var(--muted);margin:20px 0 0}.legend span:before{content:"";display:inline-block;width:7px;height:7px;border-radius:2px;background:#edf1ff;border:1px solid #d7e0ff;margin-right:5px}.legend span:last-child:before{background:white;border-color:#dde3ed}.question-card{padding:30px 36px;min-height:405px}.question-top{display:flex;align-items:center;justify-content:space-between;font-size:11px;color:var(--muted)}.question-kind{display:flex;gap:10px;align-items:center}.tag{display:inline-flex;background:var(--blue-soft);color:var(--blue);border-radius:5px;padding:5px 9px;font-size:11px;font-weight:650}.question-card h2{font-size:21px;line-height:1.8;margin:24px 0 9px;white-space:pre-line;overflow-wrap:anywhere}.question-hint{font-size:11px;color:var(--muted);margin:0 0 25px}.options{display:grid;gap:11px}.option{display:flex;align-items:center;gap:13px;padding:15px 17px;border:1px solid #e4e9f1;border-radius:10px;cursor:pointer;transition:.15s;min-height:56px;font-size:14px}.option:hover{border-color:#b3c2f8;background:#fafbff}.option.chosen{background:#f1f4ff;border-color:#829cf2;color:#2f50cb}.option input{accent-color:var(--blue);width:16px;height:16px;flex-shrink:0;margin:0}.option .letter{font-size:12px;color:#8b97aa}.option-text{line-height:1.7;overflow-wrap:anywhere}.question-actions{margin-top:25px;display:flex;justify-content:space-between;align-items:center;gap:16px}.question-actions .right{display:flex;gap:10px}.save-line{display:flex;align-items:center;gap:7px;color:var(--green);font-size:11px;margin-top:19px;line-height:1.8;min-height:22px}.save-line:before{content:"";width:6px;height:6px;background:currentColor;border-radius:50%;flex-shrink:0}.save-line.warning{color:#ae743a}.save-line.error{color:var(--red)}.below-note{font-size:11px;color:#929bac;line-height:1.9;margin:24px 1px}.submit-panel{margin-top:16px;padding:20px}.submit-panel p{font-size:10px;color:var(--muted);line-height:1.8;margin:10px 0 0;text-align:center}.result-shell{max-width:700px;margin:55px auto 0;padding:0 20px}.result-card{text-align:center;padding:44px 40px}.success-icon{background:var(--green-soft);color:var(--green);border-radius:50%;width:64px;height:64px;margin:auto;display:grid;place-items:center;font-size:30px}.result-card h1{font-size:26px;margin:22px 0 10px}.result-card p{font-size:13px;color:var(--muted);line-height:1.9}.result-score{font-size:64px;font-weight:800;color:var(--blue);margin:28px 0 0;letter-spacing:-3px}.result-score small{font-size:17px;font-weight:400;letter-spacing:0;color:#9aa4b5;margin-left:8px}.result-label{font-size:11px;color:var(--muted);margin:3px 0 28px}.result-details{display:grid;grid-template-columns:repeat(3,1fr);padding:22px 0;margin-bottom:25px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);gap:12px}.result-details strong{display:block;font-size:15px;overflow-wrap:anywhere}.result-details span{display:block;font-size:10px;color:var(--muted);margin-top:8px}.toast{position:fixed;bottom:26px;left:50%;transform:translateX(-50%);background:#1d2c42;color:white;padding:13px 22px;border-radius:10px;box-shadow:0 6px 24px #0002;max-width:90vw;font-size:12px;line-height:1.7;z-index:20}dialog{border:1px solid var(--line);border-radius:20px;padding:30px;max-width:460px;width:calc(100% - 30px);color:var(--ink);box-shadow:0 30px 100px #182b4c33}dialog::backdrop{background:#17263c66;backdrop-filter:blur(3px)}dialog h2{font-size:23px;margin:18px 0}dialog p{font-size:13px;line-height:1.8}.muted{color:var(--muted)}.dialog-actions{display:flex;justify-content:flex-end;gap:12px;margin-top:25px}.admin-login{width:420px;max-width:calc(100% - 32px);margin:60px auto}.dashboard{max-width:1228px;margin:25px auto;padding:0 10px}.dashboard-header{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin:20px 0 26px}.dashboard-header h1{font-size:29px;margin:10px 0}.dashboard-header p{font-size:12px;color:var(--muted);line-height:1.8;margin:0}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:25px}.stat{padding:23px 26px}.stat-label{font-size:11px;color:var(--muted)}.stat-number{font-size:33px;font-weight:750;margin-top:11px;letter-spacing:-1px}.stat-number small{font-size:12px;color:var(--muted);font-weight:400;margin-left:6px;letter-spacing:0}.stat.blue{background:var(--blue);color:white;border-color:var(--blue)}.stat.blue .stat-label,.stat.blue small{color:#dbe3ff}.toolbar{display:flex;justify-content:space-between;gap:20px;padding:22px 25px;border-bottom:1px solid var(--line);align-items:center;flex-wrap:wrap}.toolbar h2{font-size:15px;margin:0}.toolbar small{font-size:10px;color:var(--muted);margin-left:12px}.toolbar-actions{display:flex;gap:9px;flex-wrap:wrap}.table-filter{padding:16px 25px;display:flex;gap:8px;flex-wrap:wrap}.filter-btn{background:transparent;border:0;color:var(--muted);font-size:11px;padding:7px 13px;border-radius:6px}.filter-btn.active{background:var(--blue-soft);color:var(--blue);font-weight:700}.table-scroll{overflow:auto}table{border-collapse:collapse;width:100%;text-align:left;white-space:nowrap}th{font-size:10px;font-weight:500;color:#8f99ab;background:#fafbfe;padding:14px 24px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}td{font-size:12px;padding:17px 24px;border-bottom:1px solid #eff2f7}tr:last-child td{border-bottom:0}.status-badge{font-size:10px;padding:5px 8px;border-radius:5px;color:#8a94a4;background:#f0f3f7}.status-badge.active{color:#9c752b;background:#fff6df}.status-badge.done{color:var(--green);background:var(--green-soft)}.code-cell{font-variant-numeric:tabular-nums;color:#728099}.admin-note{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:22px}.info-panel{padding:24px}.info-panel h3{font-size:13px;margin:0 0 11px}.info-panel p{font-size:11px;color:var(--muted);line-height:1.9;margin:0}.empty-state{text-align:center;padding:35px;color:var(--muted);font-size:13px}.refresh-note{font-size:11px;color:var(--muted);margin-top:18px}.refresh-note.error{color:var(--red)}.button-row{display:flex;gap:10px;flex-wrap:wrap}.import-status{font-size:12px;color:var(--red);line-height:1.8;margin-top:14px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
@media(min-width:1500px){.landing{margin-top:65px}}@media(max-width:1100px){.landing{gap:38px;grid-template-columns:minmax(0,1fr) 380px;padding:25px}.hero h1{font-size:41px}.site-footer{margin-left:35px;margin-right:35px}.workspace,.dashboard{padding:0 30px}.brand-sub{display:none}.exam-layout{grid-template-columns:220px minmax(0,1fr)}.question-card{padding:25px}.stats-grid{gap:12px}.stat{padding:21px}}@media(max-width:760px){.topbar{height:74px;padding:0 20px}.brand{font-size:18px}.brand-mark{width:32px;height:32px}.subtle-link{font-size:11px}.landing{grid-template-columns:1fr;margin-top:8px;padding:20px;gap:30px;max-width:550px}.hero h1{font-size:35px;margin:15px 0}.hero-copy{font-size:13px;line-height:1.8}.hero h1 br{display:none}.exam-name{font-size:16px;margin-top:20px}.meta-row{margin-top:20px;padding-top:18px;gap:35px}.meta-value{font-size:24px}.journey{display:none}.entry-card{padding:27px 25px}.site-footer{margin:30px 20px 0;padding:20px 0;gap:10px;font-size:10px}.workspace,.dashboard{padding:0 18px;margin-top:12px}.exam-heading{align-items:center;margin-bottom:18px;gap:12px}.exam-heading h1{font-size:20px}.exam-heading p{font-size:10px}.student-badge{font-size:10px;gap:7px}.avatar{width:30px;height:30px}.exam-layout{grid-template-columns:1fr;gap:16px}.answer-sidebar{position:static;display:grid;grid-template-columns:1fr 1fr;gap:12px;align-items:start}.timer-panel{padding:18px}.timer{font-size:30px;margin:5px 0}.timer-caption{font-size:9px}.nav-panel{margin:0;padding:16px}.nav-header{font-size:11px}.nav-header span{font-size:10px}.number-grid{gap:5px;grid-template-columns:repeat(5,1fr);max-height:160px;overflow:auto;padding:1px}.number-grid button{aspect-ratio:auto;height:25px;font-size:10px}.progress-track{margin:10px 0}.legend{display:none}.submit-panel{grid-column:1/-1;padding:0;border:0;background:transparent;margin:0}.submit-panel p{display:none}.question-card{padding:24px 21px;min-height:0}.question-card h2{font-size:18px;margin:20px 0 8px}.option{padding:13px;gap:9px;font-size:13px}.question-actions{flex-wrap:wrap;gap:10px}.question-actions .right{gap:7px}.question-actions .btn{padding:10px 13px;font-size:12px}.below-note{font-size:10px;margin:20px 0}.result-shell{margin-top:25px}.result-card{padding:32px 23px}.result-details{gap:6px}.result-details strong{font-size:13px}.stats-grid{grid-template-columns:repeat(2,1fr);gap:10px}.stat{padding:19px}.stat-number{font-size:28px}.dashboard-header{align-items:center;margin-top:10px}.dashboard-header h1{font-size:24px}.dashboard-header p{font-size:10px}.toolbar{padding:18px}.toolbar-actions{gap:7px}.toolbar small{display:block;margin:5px 0 0}.table-filter{padding:12px}.admin-note{grid-template-columns:1fr;gap:12px}.info-panel{padding:20px}th,td{padding:14px 18px}.admin-login{margin-top:30px}.result-score{font-size:58px}}@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

.progress-fill{width:100%;background:transparent}.visual-progress{display:block;width:100%;height:4px;appearance:none;border:0;background:#edf0f6}.visual-progress::-webkit-progress-bar{background:#edf0f6}.visual-progress::-webkit-progress-value{background:var(--blue)}.visual-progress::-moz-progress-bar{background:var(--blue)}
.group-choices{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:28px}.group-choice{display:flex;align-items:center;gap:10px;padding:14px 12px;border:1px solid #dfe6f0;border-radius:10px;background:transparent;color:#65758d;text-align:left;font-size:11px;line-height:1.6}.group-choice.selected{background:var(--blue-soft);border-color:#8ba1ef;color:var(--blue)}.group-letter{font-weight:800;font-size:17px;flex-shrink:0}.stage-switch,.section-switch{display:flex;gap:6px;background:#eaf0f8;border-radius:10px;padding:5px;margin-bottom:22px}.stage-switch button,.section-switch button{border:0;background:transparent;color:#8591a6;padding:10px 14px;flex:1;border-radius:7px;font-size:12px;font-weight:650}.stage-switch button.selected,.section-switch button.selected{background:#fff;color:var(--blue);box-shadow:0 2px 8px #132c5710}.small-copy{font-size:11px;margin-top:20px}.section-switch{max-width:700px;margin:0 0 22px auto}.material-card{padding:25px 30px;margin-bottom:20px}.material-label{font-size:11px;font-weight:650;color:var(--blue);margin-bottom:16px}.reading-passage{font-family:Georgia,"Times New Roman",serif;font-size:17px;line-height:1.9;white-space:pre-line;color:#31435e}.material-card audio{width:100%;height:42px}.audio-note{font-size:11px;color:var(--muted);line-height:1.8;margin-bottom:0}.text-answer-field textarea{width:100%;resize:vertical;min-height:110px;border:1px solid #dce4f2;border-radius:11px;background:#fafbff;padding:15px 17px;line-height:1.9;color:var(--ink);font-size:16px;outline:none}.text-answer-field textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px #365ce810}.incomplete-question{padding:18px;background:#fff8e8;border-radius:10px;color:#956c20;font-size:13px;line-height:1.9}.paper-selector{min-width:230px;max-width:100%;border:1px solid #dfe6ef;border-radius:8px;padding:10px 12px;background:white;color:var(--ink);font:inherit;font-size:12px}.source-note{font-size:11px;color:#a67430;line-height:1.9;margin:12px 0 0}.review-dialog{max-width:900px;width:calc(100% - 30px);max-height:85vh;padding:0}.review-heading{padding:24px 28px;position:sticky;top:0;background:white;border-bottom:1px solid var(--line);z-index:1;display:flex;justify-content:space-between;align-items:center;gap:15px}.review-heading h2{margin:0;font-size:20px}.review-body{padding:15px 28px 25px}.review-item{padding:18px 0;border-bottom:1px solid var(--line)}.review-item h3{font-size:13px;line-height:1.8;margin:0 0 10px}.review-item p{font-size:12px;line-height:1.8;margin:7px 0;white-space:pre-wrap;overflow-wrap:anywhere}.review-answer{color:#40577a}.review-key{color:var(--green)}.review-item input{width:70px;padding:7px;border:1px solid #d5dfed;border-radius:7px;font-size:12px}.review-footer{padding:16px 28px;background:white;border-top:1px solid var(--line);position:sticky;bottom:0;display:flex;justify-content:space-between;align-items:center;gap:20px}.review-flag{color:#b98035;font-size:10px}.admin-login .btn{margin-top:15px}.source-notes-panel{padding:20px 24px;margin-bottom:20px}.source-notes-panel h3{font-size:13px;margin:0 0 10px}.source-notes-panel p{font-size:12px;line-height:1.8;color:#986b2a;margin:8px 0}
@media(max-width:760px){.group-choices{margin-top:20px}.group-choice{padding:12px;font-size:10px}.section-switch{margin-bottom:16px}.section-switch button{font-size:10px;padding:9px 5px}.material-card{padding:21px 20px}.reading-passage{font-size:16px}.dashboard-header{flex-wrap:wrap}.paper-selector{width:100%}.review-heading,.review-body,.review-footer{padding-left:20px;padding-right:20px}.review-heading h2{font-size:17px}.meta-row{gap:25px}}

.student-badge{flex-shrink:0;white-space:nowrap}
/* Named student accounts and explicitly sourced score imports. */
.imported-panel{margin:24px 0}.import-summary{font-size:16px;font-weight:700;color:#264762;margin:14px 0}.status-badge.imported{background:#fff2d4;color:#925a09}.import-receipt{background:#f7f9fc;padding:14px 18px;border-radius:12px;margin:16px 0;font-size:13px}.import-receipt summary{cursor:pointer;font-weight:700}.import-receipt p{line-height:1.7}.checksum{word-break:break-all;font-family:monospace}.roster-filters{display:flex;align-items:end;gap:16px;margin:18px 0}.roster-filters label{display:grid;gap:6px;font-size:13px}.roster-filters input,.roster-filters select{padding:10px 12px;border:1px solid #dbe2ea;border-radius:9px;background:#fff;font:inherit}.student-overview{max-width:1050px;margin:40px auto}.student-overview>.panel{margin-bottom:22px;padding:26px}#entry-form button+button{margin-top:12px}@media(max-width:650px){.roster-filters{align-items:stretch;flex-direction:column}.student-overview{margin:24px auto}.student-overview>.panel{padding:18px}}

#admin-login-form{display:grid;gap:18px;margin-top:28px;text-align:left}#admin-login-form label{display:grid;gap:8px;color:#334155;font-weight:600}#admin-login-form input{width:100%;padding:13px 15px;border:1px solid #d8e0ec;border-radius:12px;font:inherit}#admin-login-error{margin:0;color:#b42318}