:root{--bg: #f4f7fb;--card: #ffffff;--ink: #16233a;--muted: #5d6b83;--line: #dfe6f1;--brand: #2f6bd8;--brand-dark: #23539f;--ok: #17855c;--ok-bg: #e5f6ee;--no: #c0392b;--no-bg: #fdecea;--warn: #a86412;--warn-bg: #fdf3e2;--radius: 16px;--shadow: 0 2px 10px rgba(24, 44, 84, .07);--tap: 52px;color-scheme:light dark}@media(prefers-color-scheme:dark){:root{--bg: #101725;--card: #182234;--ink: #e9eef7;--muted: #9fb0c9;--line: #2a3850;--brand: #6ea2ff;--brand-dark: #8ab5ff;--ok: #4cc38a;--ok-bg: #123527;--no: #ff8a7a;--no-bg: #3a1d1a;--warn: #e2b269;--warn-bg: #362a15;--shadow: 0 2px 10px rgba(0, 0, 0, .35)}}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);font-family:Pretendard,Apple SD Gothic Neo,Malgun Gothic,system-ui,-apple-system,sans-serif;font-size:17px;line-height:1.65;-webkit-text-size-adjust:100%}body.easy-font{letter-spacing:.03em;word-spacing:.08em;line-height:1.9;font-size:19px}#app{min-height:100vh}.view{max-width:780px;margin:0 auto;padding:18px 16px 72px;display:flex;flex-direction:column;gap:16px}h1{font-size:1.6rem;margin:0 0 6px;letter-spacing:-.01em}h2{font-size:1.15rem;margin:0 0 10px}p{margin:0 0 10px}p:last-child{margin-bottom:0}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}.hero{background:linear-gradient(160deg,var(--card),color-mix(in srgb,var(--brand) 8%,var(--card)))}.hero h1{font-size:2rem}.lead{font-size:1.1rem;color:var(--muted)}.muted{color:var(--muted)}.small{font-size:.88rem}.notice{background:var(--warn-bg);color:var(--warn);border-radius:12px;padding:10px 12px}.notice-card{border-color:color-mix(in srgb,var(--warn) 40%,var(--line))}.btn{min-height:var(--tap);padding:12px 20px;border-radius:12px;border:2px solid transparent;background:var(--brand);color:#fff;font:inherit;font-weight:700;cursor:pointer;transition:transform .06s ease,background .15s ease}.btn:hover{background:var(--brand-dark)}.btn:active{transform:translateY(1px)}.btn:focus-visible{outline:3px solid var(--brand);outline-offset:2px}.btn.ghost{background:transparent;color:var(--brand);border-color:var(--line)}.btn.ghost:hover{background:color-mix(in srgb,var(--brand) 10%,transparent)}.btn.ghost.active{border-color:var(--brand);background:color-mix(in srgb,var(--brand) 14%,transparent)}.btn.danger{background:var(--no)}.btn.small{min-height:40px;padding:8px 14px;font-size:.9rem}.btn.big{min-height:64px;font-size:1.15rem;padding:14px 24px}.btn[disabled]{opacity:.5;cursor:default}.btn.recording{background:var(--no)}.btn.listen{min-height:72px;font-size:1.35rem;padding:16px 28px;flex:1}.link{background:none;border:0;color:var(--brand);font:inherit;text-decoration:underline;cursor:pointer;padding:8px}.row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}.row.center{justify-content:center}.input{width:100%;min-height:var(--tap);padding:12px 14px;border:2px solid var(--line);border-radius:12px;background:var(--card);color:var(--ink);font:inherit}.input:focus{border-color:var(--brand);outline:none}.input.inline{width:auto;min-height:40px;display:inline-block}.textarea{min-height:120px;resize:vertical;font-family:inherit}.small-input{font-size:.9rem;min-height:40px}.answer-input{font-size:1.5rem;text-align:center;letter-spacing:.05em}.share-url{font-family:ui-monospace,monospace;font-size:.75rem}.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}.field-label{font-weight:700;font-size:.95rem}.field-hint{color:var(--muted);font-size:.85rem}.field-inline{display:flex;align-items:center;gap:10px;margin-bottom:10px}.field-inline input[type=checkbox]{width:24px;height:24px;accent-color:var(--brand)}.settings-grid{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.settings-panel summary{cursor:pointer;font-weight:700}.home-grid{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(160px,1fr))}.home-card{display:flex;flex-direction:column;gap:4px;align-items:flex-start;text-align:left;padding:18px;border-radius:var(--radius);border:2px solid var(--line);background:var(--card);box-shadow:var(--shadow);cursor:pointer;font:inherit;color:inherit;min-height:120px}.home-card:hover{border-color:var(--brand)}.home-card.primary{background:var(--brand);color:#fff;border-color:var(--brand)}.home-card.primary .home-sub{color:#ffffffd9}.home-emoji{font-size:1.8rem}.home-title{font-weight:800;font-size:1.1rem}.home-sub{color:var(--muted);font-size:.9rem}.list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}.plain-list{margin:6px 0 0;padding-left:18px}.list-row{display:flex;gap:8px;align-items:center;flex-wrap:wrap;padding:10px;border:1px solid var(--line);border-radius:12px}.list-main{flex:1 1 240px;display:flex;flex-direction:column;align-items:flex-start;gap:2px;background:none;border:0;font:inherit;color:inherit;text-align:left;cursor:pointer;padding:4px}.items{display:flex;flex-direction:column;gap:10px}.item-row{display:grid;grid-template-columns:32px 1fr;gap:8px;align-items:start;padding:10px;border:1px solid var(--line);border-radius:12px}.item-no{font-weight:800;color:var(--muted);padding-top:12px}.item-fields{display:flex;flex-direction:column;gap:6px}.item-actions{grid-column:2;display:flex;gap:6px;align-items:center;flex-wrap:wrap}.share-box{display:flex;flex-direction:column;gap:10px}.qr{background:#fff;padding:12px;border-radius:12px;width:fit-content}.qr svg{display:block;width:220px;height:220px}.small-qr svg{width:150px;height:150px}.run-card{display:flex;flex-direction:column;gap:14px}.run-head{display:flex;align-items:center;gap:10px;justify-content:space-between}.run-title{font-size:1.3rem;margin:0}.badge{padding:4px 10px;border-radius:999px;font-size:.8rem;font-weight:800;background:var(--line)}.badge.exam{background:var(--no-bg);color:var(--no)}.badge.practice{background:var(--ok-bg);color:var(--ok)}.badge.retry{background:var(--warn-bg);color:var(--warn)}.progress{display:flex;gap:5px;flex-wrap:wrap}.dot{width:12px;height:12px;border-radius:50%;background:var(--line)}.dot.done{background:var(--ok)}.dot.now{background:var(--brand);transform:scale(1.25)}.listen-row{display:flex;gap:10px;flex-wrap:wrap}.reveal,.hint{font-size:2rem;font-weight:800;text-align:center;padding:14px;border-radius:12px;background:var(--ok-bg);color:var(--ok)}.hint{font-size:1.4rem;background:var(--warn-bg);color:var(--warn);letter-spacing:.25em}.input-area{display:flex;flex-direction:column;gap:10px}.pad{width:100%;height:var(--pad-height, 150px);border:2px solid var(--line);border-radius:12px;overflow:hidden;background:#fff}.pad-canvas{display:block;width:100%;height:100%}.blocks{display:flex;flex-direction:column;gap:10px}.blocks-slot{min-height:64px;border:2px dashed var(--line);border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.8rem;font-weight:800;letter-spacing:.08em;background:var(--card)}.blocks-slot.empty{color:var(--muted);font-size:1rem;font-weight:400}.blocks-tray{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}.tile{min-width:56px;min-height:56px;font-size:1.5rem;font-weight:700;border-radius:12px;border:2px solid var(--line);background:var(--card);color:var(--ink);cursor:pointer}.tile:hover{border-color:var(--brand)}.blocks-controls{display:flex;gap:8px;justify-content:center}.feedback{display:flex;flex-direction:column;gap:10px;padding-top:6px;border-top:1px solid var(--line)}.verdict{font-size:1.2rem;font-weight:800}.verdict.correct{color:var(--ok)}.verdict.partial{color:var(--warn)}.verdict.wrong{color:var(--no)}.answer-reveal{font-size:1.5rem;font-weight:700}.mark{padding:0 1px;border-radius:4px}.mark.wrong{background:var(--no-bg);color:var(--no);text-decoration:underline wavy}.mark.missing{background:var(--warn-bg);color:var(--warn);text-decoration:line-through}.tags{display:flex;gap:6px;flex-wrap:wrap}.tag{background:var(--warn-bg);color:var(--warn);padding:3px 10px;border-radius:999px;font-size:.85rem;font-weight:700}.result-head h1{font-size:2.6rem}.result-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}.result-row{display:flex;gap:10px;padding:10px;border-radius:12px;border:1px solid var(--line)}.result-row.ok{background:var(--ok-bg)}.result-row.no{background:var(--no-bg)}.result-icon{font-size:1.4rem;font-weight:800}.result-body{flex:1}.stat-list{margin:0;padding-left:18px}.bar-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:12px}.bar-row{display:flex;align-items:center;gap:10px}.bar-label{width:72px;font-weight:700}.bar-track{flex:1;height:14px;background:var(--line);border-radius:999px;overflow:hidden}.bar-fill{display:block;height:100%;background:var(--brand)}.bar-count{width:32px;text-align:right;font-variant-numeric:tabular-nums}.ink-grid{display:grid;gap:10px;grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}.ink-cell{border:2px solid var(--line);border-radius:12px;padding:8px;display:flex;flex-direction:column;gap:6px}.ink-cell.ok{border-color:var(--ok);background:var(--ok-bg)}.ink-cell.no{border-color:var(--no);background:var(--no-bg)}.ink-answer{font-weight:800;text-align:center}.ink-img{width:100%;border-radius:8px;background:#fff}.ink-mini{max-width:240px;border-radius:8px;background:#fff}.preview-list{margin:8px 0;padding-left:22px}.preview-list li.ok{color:var(--ok)}.preview-list li.no{color:var(--no)}.big-count{font-size:2.4rem;font-weight:800;margin:6px 0}.board{min-height:100vh;display:flex;flex-direction:column;padding:20px;gap:16px;background:var(--card)}.board-top{display:flex;align-items:center;gap:14px;flex-wrap:wrap}.board-title{font-size:1.3rem;font-weight:800;flex:1}.board-count{font-size:1.4rem;font-weight:800;color:var(--muted);font-variant-numeric:tabular-nums}.board-main{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;text-align:center}.board-number{font-size:clamp(3rem,12vw,9rem);font-weight:900;color:var(--brand);line-height:1;transition:font-size .2s ease}.board-main.revealed .board-number{font-size:clamp(1.5rem,4vw,3rem)}.board-answer{font-size:clamp(2.4rem,10vw,8rem);font-weight:800;letter-spacing:.02em;line-height:1.2;word-break:keep-all;padding:0 4vw}.board-hidden{font-size:clamp(1.2rem,3vw,2rem);color:var(--muted)}.board-point{font-size:1.2rem;color:var(--muted)}.board-controls{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.board-controls .btn{min-width:140px;min-height:72px;font-size:1.1rem}.board-settings{display:flex;gap:14px;align-items:center;flex-wrap:wrap;justify-content:center;color:var(--muted)}.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,20px);background:var(--ink);color:var(--bg);padding:12px 20px;border-radius:999px;font-weight:700;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:50;max-width:min(90vw,520px);text-align:center}.toast.show{opacity:1;transform:translate(-50%)}.toast.warn{background:var(--warn);color:#fff}.paper{background:#fff;color:#111;border-radius:12px;padding:24px;border:1px solid var(--line)}.paper-head{border-bottom:2px solid #111;padding-bottom:10px;margin-bottom:16px}.paper-head h1{color:#111}.paper-sub{color:#555;margin:0}.paper-meta{display:flex;gap:20px;margin-top:10px;color:#333}.paper-table{font-size:1.15rem;line-height:2.1;color:#111}.paper-items{list-style:decimal;padding-left:26px;display:flex;flex-direction:column;gap:14px;color:#111}.paper-item{break-inside:avoid}.paper-repeat{display:flex;flex-direction:column;gap:6px;margin-top:6px}.sheet-cells{display:flex;flex-wrap:wrap;gap:4px;margin-top:4px}.sheet-cell{width:36px;height:36px;border:1px solid #444;display:inline-flex;align-items:center;justify-content:center;font-size:1.15rem;color:#111}.sheet-cell.space{border-style:dashed;border-color:#aaa}.trace-char{color:#c9c9c9}.paper-note{margin-top:14px;color:#444}@media print{body{background:#fff}.no-print,.toast{display:none!important}.view{padding:0;max-width:none}.paper{border:0;border-radius:0;padding:0}.card{box-shadow:none}}@media(max-width:520px){.view{padding:12px 12px 60px}.card{padding:14px}.btn.listen{min-height:64px;font-size:1.15rem}.item-row{grid-template-columns:26px 1fr}}.ink-empty{display:grid;place-items:center;min-height:72px;border:1px dashed var(--line);border-radius:10px;background:var(--bg)}.row-stack{display:grid;gap:8px;justify-items:start;margin-top:10px}.ok-text{color:var(--ok, #2e9e5b)}.semester-head{display:flex;justify-content:space-between;align-items:center;gap:12px;width:100%;padding:14px 4px;background:none;border:0;cursor:pointer;font:inherit;font-weight:700;font-size:1.05rem;color:inherit;text-align:left}.semester-head:before{content:"▸";margin-right:8px;transition:transform .15s ease}.semester-head.open:before{transform:rotate(90deg)}.level-list{list-style:none;margin:0;padding:0;display:grid;gap:10px}.level-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;padding:12px;border:1px solid var(--line);border-radius:12px}.level-info{display:grid;gap:2px;min-width:0;flex:1 1 260px}.preview-line{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.level-actions{display:flex;flex-wrap:wrap;gap:6px}.input-switch{margin:14px 0 6px;display:grid;gap:6px;justify-items:center}.switch-row{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}.switch-btn{min-height:44px;padding:10px 16px;border-radius:999px;cursor:pointer;border:1px solid var(--line);background:transparent;color:inherit;font:inherit;font-size:.95rem}.switch-btn.on{background:var(--brand);border-color:transparent;color:#fff;font-weight:700}