:root{color-scheme:dark;--bg:#090b10;--panel:#11141b;--panel2:#171b24;--line:#242a35;--text:#edf0f7;--muted:#98a3b7;--mint:#88e2c5;--red:#fb8b96;--amber:#f5c577;--radius:18px;--font:Inter,"Segoe UI",system-ui,-apple-system,sans-serif}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.55 var(--font)}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,a,input,select,textarea{outline-offset:4px}button{cursor:pointer}button:disabled{opacity:.5;cursor:wait}button:focus-visible,a:focus-visible{outline:2px solid var(--mint)}input,select,textarea{color:var(--text);background:#0c0f15;border:1px solid #343c4b;border-radius:10px;padding:11px 12px;width:100%}input[type=checkbox],input[type=radio]{width:18px;height:18px;accent-color:var(--mint);flex-shrink:0}input[type=color]{height:46px;padding:5px;max-width:100px}textarea{resize:vertical;min-height:95px}label{display:block;font-size:13px;color:#c5cedf;margin:0 0 8px}label input,label select,label textarea{margin-top:7px}h1,h2,h3,p{margin:0}h1{font-size:32px;font-weight:650;letter-spacing:-1px;line-height:1.25}h2{font-size:19px;font-weight:600;letter-spacing:-.3px}h3{font-size:16px;font-weight:600}p+p{margin-top:12px}small{color:var(--muted)}.muted{color:var(--muted)}.eyebrow{color:var(--mint);text-transform:uppercase;font-size:11px;letter-spacing:2px;font-weight:650;margin-bottom:11px}.sidebar{width:246px;background:#0e1118;border-right:1px solid #1b202a;position:fixed;inset:0 auto 0 0;padding:32px 20px 18px;display:flex;flex-direction:column;z-index:10}.brand{display:flex;gap:12px;align-items:center;margin:0 5px 48px;font-size:23px;font-weight:700;letter-spacing:-.6px}.brand-mark{width:43px;height:43px;border-radius:13px;background:var(--mint);color:#10332b;font-size:30px;line-height:42px;text-align:center;position:relative}.brand-mark span{position:absolute;right:4px;top:-7px;font-size:20px}.brand-light{font-weight:400;color:#bdc5d4}.brand small{display:block;font-size:8px;letter-spacing:1.8px;color:#79859a;margin-top:1px}.nav-caption{font-size:10px;letter-spacing:1.5px;color:#718099;margin:0 12px 15px}nav{display:grid;gap:7px}nav a{display:flex;align-items:center;gap:12px;padding:12px 13px;border-radius:10px;font-size:13px;color:#a8b3c7;line-height:1.4}nav a:hover{background:#191e28}nav a.active{color:var(--mint);background:#1b2b2a;box-shadow:inset 2px 0 var(--mint)}.icon{width:20px;height:20px;flex-shrink:0;vertical-align:middle;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}.nav-count{margin-left:auto;background:#303224;border-radius:5px;padding:0 6px;color:#f2cd85;font-size:11px}.sidebar-footer{display:flex;gap:10px;border-top:1px solid var(--line);padding:20px 8px 10px;margin-top:auto;font-size:11px;color:#bcc6d5}.sidebar-footer small{display:block;font-size:10px;color:#707e92}.local-dot{width:6px;height:6px;background:var(--mint);border-radius:50%;margin-top:6px}.quit{background:none;border:0;text-align:left;color:#7f8aa0;padding:10px 9px;font-size:11px}.quit:hover{color:var(--text)}.shell{margin-left:246px}.topbar{height:77px;border-bottom:1px solid #1b202a;display:flex;align-items:center;justify-content:space-between;padding:0 44px;font-size:12px;color:#a8b3c7}.top-right{display:flex;align-items:center;gap:25px}.avatar{width:31px;height:31px;background:#242635;border-radius:50%;color:#cbbfec;display:grid;place-items:center;font-weight:700}.top-right #save-indicator{font-size:11px;color:#849991}.top-right #save-indicator.error{color:var(--red)}main{padding:37px 44px 35px;max-width:1510px;margin:auto;min-height:calc(100vh - 137px)}.page-footer{font-size:11px;color:#586577;display:flex;justify-content:space-between;padding:15px 44px;border-top:1px solid #1b202a}.page-head{display:flex;justify-content:space-between;align-items:flex-start;gap:22px;margin-bottom:29px}.page-head p{color:var(--muted);font-size:13px;margin-top:9px}.actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.btn{display:inline-flex;justify-content:center;align-items:center;gap:8px;border:1px solid #343d4c;background:#1a202b;color:var(--text);border-radius:10px;padding:10px 16px;font-weight:550;font-size:13px;white-space:nowrap;line-height:1.6}.btn:hover{background:#263040;border-color:#5b697f}.btn.primary{background:var(--mint);color:#123a30;border-color:var(--mint)}.btn.primary:hover{background:#a0efd5}.btn.ghost{background:transparent;border-color:var(--line);color:#b4bfd2}.btn.danger{color:var(--red)}.btn.small{font-size:11px;padding:6px 11px}.btn.wide{width:100%}.link-btn{background:none;border:0;color:var(--mint);font-size:12px;padding:0;cursor:pointer}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:24px 0}.stat{border:1px solid var(--line);background:var(--panel);padding:20px 21px;border-radius:14px}.stat-top{display:flex;align-items:center;justify-content:space-between;color:#aab5c9;font-size:11px}.stat-top .icon{color:#7f8ea8;width:18px}.stat-value{font-size:31px;line-height:1.3;letter-spacing:-1px;margin:15px 0 7px;font-weight:600}.stat-value small{font-size:14px;letter-spacing:0;font-weight:400}.stat-caption{font-size:10px;color:#75839b}.two-col{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(270px,1fr);gap:20px}.panel{border:1px solid var(--line);border-radius:var(--radius);padding:24px;background:var(--panel)}.panel-head{display:flex;justify-content:space-between;gap:15px;align-items:center;margin-bottom:21px}.panel-head p{font-size:11px;color:var(--muted);margin-top:4px}.panel-head h2{font-size:16px}.panel-head select{width:auto;font-size:11px;padding:6px 10px}.hero-card{border-radius:16px;border:1px solid #2c413f;background:radial-gradient(ellipse at top right,#203b36 0%,#131d22 55%,#12191e 100%);padding:26px;display:flex;gap:28px;align-items:center;justify-content:space-between}.hero-card h2{font-size:21px;margin-bottom:7px}.hero-card p{font-size:12px;color:#aebfbd;max-width:540px}.hero-number{font-size:62px;color:#88e2c54a;line-height:1;font-weight:300;letter-spacing:-4px}.section-gap{margin-top:26px}.chart{height:245px;width:100%;overflow:visible}.chart text{fill:#7e8ba0;font-family:var(--font);font-size:11px}.chart circle{stroke:#11141b;stroke-width:3}.chart .grid{stroke:#242b38;stroke-dasharray:4 5}.chart-empty{height:235px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:13px;text-align:center;background:repeating-linear-gradient(0deg,transparent,transparent 53px,#202733 54px);border-radius:10px}.empty-icon{width:48px;height:48px;border:1px solid #32483f;border-radius:14px;color:var(--mint);display:grid;place-items:center;background:#182b25}.chart-empty p{font-size:13px;color:#b2bdcc}.chart-empty small{font-size:11px;max-width:270px}.subject-row{display:flex;gap:12px;align-items:center;padding:13px 0;border-bottom:1px solid #202631}.subject-row:last-child{border:0}.subject-marker{width:35px;height:35px;border:1px solid var(--subject,#7d91b9);background:color-mix(in srgb,var(--subject,#7d91b9) 10%,transparent);color:var(--subject,#7d91b9);border-radius:10px;display:grid;place-items:center;font-weight:650;font-size:11px;flex-shrink:0}.subject-info{flex:1;min-width:0}.subject-info h3{font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.subject-info p{font-size:10px;color:#8090a6;margin-top:3px}.subject-score{font-size:16px;font-weight:600;white-space:nowrap}.subject-score small{font-size:10px}.bar{height:4px;background:#28303d;border-radius:10px;margin-top:8px;overflow:hidden}.bar span{display:block;height:100%;background:var(--subject,var(--mint));border-radius:10px}.pill{display:inline-block;border:1px solid #3c4555;padding:3px 8px;border-radius:6px;font-size:10px;color:#adb9cb;line-height:1.4}.pill.mint{color:var(--mint);background:#172b25;border-color:#2b4b3f}.pill.amber{color:var(--amber);background:#322b1d;border-color:#4a402a}.pill.red{color:var(--red);background:#301e27;border-color:#52303a}.pill.subject{color:var(--subject);border-color:color-mix(in srgb,var(--subject) 35%,transparent);background:color-mix(in srgb,var(--subject) 8%,transparent)}.grid-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:17px}.quiz-card{border:1px solid var(--line);border-radius:15px;padding:22px;background:var(--panel);display:flex;flex-direction:column;gap:17px}.quiz-card h3{font-size:16px;line-height:1.45}.quiz-card p{color:var(--muted);font-size:12px}.quiz-card .actions{margin-top:auto}.card-meta{display:flex;gap:12px;font-size:11px;color:#8e9cb2}.filterbar{display:flex;gap:12px;align-items:center;margin-bottom:23px;flex-wrap:wrap}.filterbar input{max-width:280px}.filterbar select{max-width:240px}.filterbar .summary{margin-left:auto;color:var(--muted);font-size:12px}.table-wrap{overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:12px}th{text-align:left;color:#8390a6;font-size:10px;letter-spacing:.6px;font-weight:500;padding:11px 12px;border-bottom:1px solid #303847}td{padding:14px 12px;border-bottom:1px solid #232b37}tr:last-child td{border:0}.score-cell{color:var(--mint);font-weight:600}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:17px}.form-grid .full{grid-column:1/-1}.step-label{display:flex;align-items:center;gap:9px;font-size:14px;font-weight:600;margin-bottom:22px}.step-label span{font-size:11px;background:#22382f;color:var(--mint);width:24px;height:24px;border-radius:7px;display:grid;place-items:center}.tabs{display:flex;gap:6px;padding:5px;background:#090c12;border:1px solid var(--line);border-radius:11px;margin:18px 0}.tabs button{flex:1;border:0;border-radius:7px;background:transparent;padding:9px;color:#92a0b7;font-size:12px}.tabs button.active{background:#24322f;color:var(--mint)}.source-zone{border:1px dashed #455267;border-radius:12px;background:#0e131c;padding:25px;text-align:center;margin-bottom:16px}.source-zone .icon{color:var(--mint);width:31px;height:31px;margin-bottom:12px}.source-zone p{font-size:13px}.source-zone small{display:block;font-size:11px;margin:7px 0 15px}.source-zone input[type=file]{font-size:11px;margin-top:14px}.check-row{display:flex;align-items:center;gap:10px;padding:12px;border:1px solid #2c3442;border-radius:10px;margin:9px 0;background:#0e131b;font-size:12px}.check-row span{flex:1}.check-row small{display:block;font-size:10px}.notice{padding:13px 15px;background:#1c2725;border:1px solid #2e443b;border-radius:10px;font-size:12px;color:#b8ccc3;line-height:1.65;margin:15px 0}.notice.warning{background:#2b2419;color:#d6c3a1;border-color:#4e4028}.notice ul{margin:6px 0;padding-left:19px}.helper{font-size:11px;color:#8795ab;margin:7px 0}.ratio{display:flex;height:7px;border-radius:5px;overflow:hidden;margin:14px 0}.ratio span:nth-child(1){background:#a78bfa}.ratio span:nth-child(2){background:#38bdf8}.ratio span:nth-child(3){background:#fb923c}.ratio span:nth-child(4){background:#88e2c5}.ratio-legend{display:flex;gap:16px;flex-wrap:wrap;font-size:10px;color:#8f9cb1}.course-preview{white-space:pre-wrap;font-size:12px;color:#b6c2d4;max-height:420px;overflow:auto;background:#0c1018;border-radius:10px;padding:18px}.empty{padding:50px 24px;text-align:center;color:var(--muted);border:1px dashed #303a4b;border-radius:16px}.empty h3{color:#d3dbea;margin:15px 0 8px}.empty p{font-size:13px;max-width:480px;margin:0 auto 20px}.empty .icon{color:var(--mint);width:30px;height:30px}.job{padding:20px;border:1px solid #376350;border-radius:12px;background:#13231f;display:flex;gap:14px;align-items:center;margin:18px 0}.spinner{display:inline-block;width:20px;height:20px;border:2px solid #345243;border-top-color:var(--mint);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.job p{font-size:13px}.job small{display:block;font-size:11px;margin-top:4px}.session-layout{display:grid;grid-template-columns:minmax(0,1fr) 220px;gap:23px}.question-box{padding:30px}.question-header{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:27px}.question-stem{font-size:20px;line-height:1.55;font-weight:550;margin-bottom:23px;white-space:pre-wrap}.option{display:flex;align-items:flex-start;gap:14px;background:#0f141e;border:1px solid #303b4f;border-radius:12px;padding:16px;margin:11px 0;cursor:pointer;font-size:14px}.option:hover{border-color:#77889e}.option.selected{background:#183229;border-color:var(--mint)}.option input{margin-top:3px}.option-letter{color:#8fa3bd;font-size:12px;font-weight:600;min-width:10px;margin-top:2px}.option.selected .option-letter{color:var(--mint)}.option span:last-child{white-space:pre-wrap}.session-side .panel{padding:20px}.timer-big{font-variant-numeric:tabular-nums;font-size:30px;letter-spacing:1px;margin:8px 0}.timer-small{font-variant-numeric:tabular-nums;color:#bdc9db}.question-nav{display:grid;grid-template-columns:repeat(5,1fr);gap:7px;margin-top:14px}.question-nav button{border:1px solid #344053;background:#141a25;border-radius:6px;color:#a8b8cf;height:29px;font-size:10px}.question-nav button.answered{background:#233c32;border-color:#47745e;color:#a2e9c4}.question-nav button.current{outline:2px solid var(--mint);outline-offset:1px}.question-nav button.excluded{background:#312c23;color:#d4b783}.session-bottom{display:flex;justify-content:space-between;gap:14px;margin-top:26px;padding-top:23px;border-top:1px solid #2c3341}.progress-track{height:5px;background:#28303f;border-radius:10px;margin:20px 0}.progress-track span{height:100%;display:block;background:var(--mint);border-radius:10px}.result-summary{display:flex;align-items:center;gap:30px;flex-wrap:wrap}.result-score{font-size:60px;letter-spacing:-3px;color:var(--mint);font-weight:650;line-height:1.2}.result-score small{font-size:20px;letter-spacing:0;color:#8bb8a7}.result-detail{font-size:12px;color:#a8b6ca}.correction{border:1px solid var(--line);border-radius:14px;background:var(--panel);margin:14px 0;overflow:hidden}.correction summary{cursor:pointer;padding:19px 21px;display:flex;gap:12px;align-items:center;font-size:13px;list-style:none}.correction summary::-webkit-details-marker{display:none}.correction summary:after{content:'＋';margin-left:auto;color:#8594aa}.correction[open] summary:after{content:'−'}.correction-content{padding:3px 21px 21px}.correction-option{padding:12px 14px;border-left:3px solid #3c4758;margin:9px 0;background:#0d121b;border-radius:3px 9px 9px 3px;font-size:13px}.correction-option.correct{border-color:var(--mint)}.correction-option.wrong{border-color:var(--red)}.correction-option p{color:#8f9db4;font-size:12px;margin-top:6px}.correction-option .option-title{display:flex;justify-content:space-between;gap:14px}.source-quote{font-size:11px;padding:11px 14px;background:#161e2b;border-radius:9px;color:#a4b6d0;margin-top:9px}.source-quote blockquote{padding:0;margin:6px 0;color:#889db8}.reminder{background:#182a25;border-radius:10px;padding:14px;margin-top:16px;font-size:12px;color:#badace}.reminder b{display:block;color:var(--mint);margin-bottom:5px}.status-legend{display:flex;gap:14px;flex-wrap:wrap;font-size:11px;color:#aebbcf;margin-top:13px}.review-card{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:23px;border:1px solid var(--line);background:var(--panel);border-radius:14px;margin:14px 0}.review-card .countdown{font-size:24px;color:var(--mint);font-weight:550}.review-card p{font-size:12px;color:var(--muted);margin-top:5px}.review-ratings{display:flex;gap:8px;flex-wrap:wrap}.editor-question{padding:18px;border:1px solid #313b4b;border-radius:12px;background:#0d121c;margin-top:15px}.editor-head{display:flex;justify-content:space-between;gap:15px;align-items:center;margin-bottom:15px}.editor-head select{max-width:250px;font-size:12px}.editor-option{display:grid;grid-template-columns:24px 1fr;gap:10px;margin-top:14px;align-items:start}.editor-option input[type=checkbox]{margin-top:13px}.editor-option textarea{min-height:60px;font-size:12px}.editor-option input[type=text]{font-size:12px;margin-top:7px}.draft-toolbar{position:sticky;bottom:15px;background:#1d2925f5;backdrop-filter:blur(12px);border:1px solid #456456;padding:16px;border-radius:12px;display:flex;justify-content:space-between;gap:10px;align-items:center;margin-top:20px}.draft-toolbar small{font-size:11px}.spacer{height:18px}dialog{color:var(--text);background:#141a24;border:1px solid #3c4a60;border-radius:18px;width:min(850px,90vw);max-height:85vh;overflow:auto;padding:28px;box-shadow:0 30px 100px #0009}dialog::backdrop{background:#000b;backdrop-filter:blur(3px)}.dialog-head{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:23px}.dialog-head button{background:none;border:0;color:#a7b7cf;font-size:24px}.dialog-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:23px}.settings-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:22px}.list-note{font-size:12px;color:#aab8cc;padding-left:19px;line-height:1.9}.inline-field{display:flex;gap:10px;align-items:center}.long-text{overflow-wrap:anywhere;white-space:pre-wrap}.chips{display:flex;gap:8px;flex-wrap:wrap}.note-subtle{font-size:10px;color:#7e8ba1;margin-top:16px}#toast{position:fixed;bottom:24px;left:calc(50% + 120px);transform:translateX(-50%);padding:13px 20px;max-width:700px;background:#243a30;border:1px solid #54836b;border-radius:12px;color:#d4efdf;font-size:13px;z-index:100;display:none;box-shadow:0 10px 50px #0007}#toast.show{display:block}#toast.error{background:#39252b;border-color:#85545d;color:#ffe1e7}.seg-divider{border-top:1px solid var(--line);margin:18px 0}.rating-note{color:#8a99af;font-size:11px;margin:12px 0}.kbd{font-size:10px;padding:2px 5px;background:#242c3c;border-radius:4px;color:#a2b1c9}.form-error{color:var(--red);font-size:12px;margin:12px 0}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:1150px){.sidebar{width:210px;padding-left:14px;padding-right:14px}.shell{margin-left:210px}main{padding:30px 27px}.topbar{padding:0 27px}.stats{gap:10px}.stat{padding:17px}.stat-value{font-size:27px}.session-layout{grid-template-columns:minmax(0,1fr) 180px}.two-col{grid-template-columns:1.45fr 1fr}.page-head{flex-wrap:wrap}#toast{left:calc(50% + 105px)}}
@media(max-width:850px){.sidebar{width:70px;padding:22px 9px}.brand{margin:0 3px 28px}.brand>span:last-child,.nav-caption,.sidebar-footer,.quit{display:none}nav a{font-size:0;padding:13px;justify-content:center}nav a .nav-count{display:none}nav a .icon{width:21px;height:21px}.shell{margin-left:70px}.topbar{height:60px;padding:0 20px}main{padding:26px 20px}.stats{grid-template-columns:1fr 1fr}.two-col,.settings-grid{grid-template-columns:1fr}.session-layout{grid-template-columns:1fr}.session-side{display:grid;grid-template-columns:1fr 1fr;gap:12px}.session-side .panel{margin:0}.page-footer{padding:15px 20px}.hero-number{display:none}.session-side .section-gap{margin-top:0}#toast{left:calc(50% + 35px);max-width:80vw}}
@media(max-width:560px){h1{font-size:25px}.form-grid{grid-template-columns:1fr}.form-grid .full{grid-column:auto}.page-head .actions{width:100%}.panel,.question-box{padding:18px}.review-card{align-items:flex-start;flex-direction:column}.top-right{gap:12px}.page-footer span{display:none}.hero-card{padding:20px;flex-wrap:wrap}.session-side{grid-template-columns:1fr}.question-stem{font-size:17px}.btn{padding:9px 12px}.draft-toolbar{flex-wrap:wrap}.result-score{font-size:45px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;scroll-behavior:auto!important}}

.hero-card + .filterbar{margin-top:25px}
.question-nav{max-height:280px;overflow-y:auto}
.incorrect-item{border:1px solid var(--line);border-radius:14px;background:var(--panel);padding:18px 21px;margin:14px 0}
.incorrect-item-meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap;color:var(--muted);font-size:11px;margin-bottom:12px}
.incorrect-item-answer{display:flex;justify-content:space-between;align-items:flex-start;gap:14px;font-size:14px;white-space:pre-wrap}
.incorrect-item-answer .pill{flex-shrink:0;white-space:nowrap}
.incorrect-item p{color:#aab7ca;font-size:12px;margin-top:9px;white-space:pre-wrap}
.settings-wide{grid-column:1/-1}.booklet-group{border-top:1px solid var(--line);padding-top:20px;margin-top:20px}.booklet-group .panel-head{margin-bottom:8px}.settings-wide .subject-info h3{white-space:normal;overflow-wrap:anywhere}.settings-wide .subject-row{flex-wrap:wrap}
@media(max-width:560px){.incorrect-item-answer{flex-direction:column;gap:7px}.incorrect-item{padding:16px}}

.pdf-scroll { max-height:65vh; overflow:auto; margin-top:16px; background:#ddd; }
.pdf-scroll img { display:block; margin:auto; }