:root{color-scheme:light dark;--bg: #fbfaf8;--surface: #ffffff;--surface-2: #f2f0ec;--border: #e3dfd8;--text: #1c1a17;--text-dim: #6c665d;--accent: #2f6f4f;--accent-soft: #e6f0ea;--danger: #a8412f;--danger-soft: #f7e8e4;--radius: 12px;--shadow: 0 1px 2px rgba(28, 26, 23, .06), 0 4px 12px rgba(28, 26, 23, .04);--scale: 1}@media (prefers-color-scheme: dark){:root:not([data-theme=light]){--bg: #16150f;--surface: #1f1e18;--surface-2: #2a2822;--border: #38352d;--text: #efece4;--text-dim: #a09a8e;--accent: #7fbf9a;--accent-soft: #23342b;--danger: #e0907f;--danger-soft: #3a2622;--shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 4px 12px rgba(0, 0, 0, .25)}}:root[data-theme=dark]{--bg: #16150f;--surface: #1f1e18;--surface-2: #2a2822;--border: #38352d;--text: #efece4;--text-dim: #a09a8e;--accent: #7fbf9a;--accent-soft: #23342b;--danger: #e0907f;--danger-soft: #3a2622;--shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 4px 12px rgba(0, 0, 0, .25)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Pretendard,-apple-system,BlinkMacSystemFont,Apple SD Gothic Neo,Noto Sans KR,Malgun Gothic,Segoe UI,system-ui,sans-serif;font-size:calc(16px * var(--scale));line-height:1.6;-webkit-text-size-adjust:100%}body[data-mode=class]{--scale: 1.45}.shell{max-width:60rem;margin:0 auto;padding:1.25rem 1.25rem 5rem}.topbar{display:flex;align-items:center;gap:.75rem;padding:.75rem 1.25rem;border-bottom:1px solid var(--border);background:var(--surface);position:sticky;top:0;z-index:10;flex-wrap:wrap}.topbar .brand{font-weight:700;letter-spacing:-.01em;text-decoration:none;color:var(--text);font-size:1.05rem}.topbar .spacer{flex:1}.crumb{color:var(--text-dim);font-size:.9rem}.crumb a{color:var(--text-dim)}a{color:var(--accent)}h1{font-size:1.75rem;margin:1.5rem 0 .25rem;letter-spacing:-.02em}h2{font-size:1.2rem;margin:2rem 0 .75rem;letter-spacing:-.01em}.subtitle{color:var(--text-dim);margin:0 0 1.5rem}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.25rem}.btn{font:inherit;font-weight:500;padding:.5rem .9rem;border-radius:9px;border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;transition:background .12s ease,border-color .12s ease}.btn:hover{background:var(--surface-2)}.btn:disabled{opacity:.45;cursor:default}.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}.btn.primary:hover{filter:brightness(1.08)}.btn.ghost{border-color:transparent;background:transparent;color:var(--text-dim)}.btn.ghost:hover{background:var(--surface-2)}.btn.small{padding:.3rem .6rem;font-size:.85rem}.row{display:flex;gap:.6rem;align-items:center;flex-wrap:wrap}.row.center{justify-content:center}.row.between{justify-content:space-between}.pill{font-size:.75rem;padding:.15rem .5rem;border-radius:999px;background:var(--surface-2);color:var(--text-dim);border:1px solid var(--border);white-space:nowrap}.notice{background:var(--danger-soft);border:1px solid var(--border);border-radius:var(--radius);padding:.75rem 1rem;color:var(--text);font-size:.9rem;margin-bottom:1rem}.grid{display:grid;gap:.9rem;grid-template-columns:repeat(auto-fill,minmax(15rem,1fr))}.tile{display:block;text-decoration:none;color:inherit;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.1rem;box-shadow:var(--shadow);transition:transform .12s ease,border-color .12s ease}.tile:hover{transform:translateY(-2px);border-color:var(--accent)}.tile .icon{font-size:1.6rem;display:block;margin-bottom:.4rem}.tile .name{font-weight:600}.tile .sub{color:var(--text-dim);font-size:.85rem}.progress{height:5px;background:var(--surface-2);border-radius:999px;overflow:hidden}.progress>div{height:100%;background:var(--accent);transition:width .25s ease}.progress-label{font-size:.8rem;color:var(--text-dim);margin-top:.35rem}.flashcard{min-height:14rem;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.75rem;text-align:center;cursor:pointer;-webkit-user-select:none;user-select:none}.flashcard .word{font-size:2.4rem;font-weight:700;letter-spacing:-.02em}.flashcard .meaning{font-size:1.25rem}.flashcard .example{color:var(--text-dim);font-size:.95rem;max-width:32rem}.flashcard .tap{color:var(--text-dim);font-size:.85rem}.grammar-title{font-size:2rem;font-weight:700;margin:0 0 .25rem}.example-row{padding:.75rem 0;border-bottom:1px solid var(--border)}.example-row:last-child{border-bottom:none}.example-row .ko{font-size:1.2rem;font-weight:600}.example-row .en{color:var(--text-dim)}.example-row .note{color:var(--text-dim);font-size:.88rem;margin-top:.3rem;font-style:italic}ul.plain{margin:.5rem 0 0;padding-left:1.2rem}ul.plain li{margin-bottom:.4rem}.slot-area{min-height:4.5rem;border:2px dashed var(--border);border-radius:var(--radius);padding:.75rem;display:flex;gap:.5rem;flex-wrap:wrap;align-items:center;background:var(--surface-2)}.slot-area.correct{border-color:var(--accent);border-style:solid;background:var(--accent-soft)}.slot-area.wrong{border-color:var(--danger);border-style:solid;background:var(--danger-soft)}.slot-area:empty:after{content:attr(data-placeholder);color:var(--text-dim);font-size:.9rem}.chunk{font:inherit;font-size:1.15rem;font-weight:600;padding:.45rem .85rem;border-radius:9px;border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer}.chunk:hover{border-color:var(--accent)}.dictation-input{font:inherit;font-size:1.3rem;width:100%;padding:.7rem .9rem;border-radius:9px;border:1px solid var(--border);background:var(--surface);color:var(--text)}.dictation-input:focus{outline:2px solid var(--accent);outline-offset:1px}.diff-ok{color:var(--accent);font-weight:700}.diff-bad{color:var(--danger);font-weight:700;text-decoration:underline wavy}.answer-line{font-size:1.35rem;font-weight:600}.speak-btn{font-size:1.5rem;width:3.4rem;height:3.4rem;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--border);background:var(--surface);cursor:pointer;color:var(--text)}.speak-btn:hover{border-color:var(--accent)}.speak-btn.speaking{background:var(--accent-soft);border-color:var(--accent)}.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}.login-wrap{max-width:24rem;margin:4rem auto;padding:0 1.25rem}.login-wrap h1{margin-bottom:.25rem}.login-wrap .card{display:flex;flex-direction:column;gap:.75rem}.login-label{font-size:.85rem;color:var(--text-dim)}.login-error{color:var(--danger);font-size:.9rem;margin:0}.who{display:inline-flex;align-items:center;gap:.4rem;font-size:.85rem;color:var(--text-dim)}.legend{display:flex;gap:.4rem;flex-wrap:wrap;margin-bottom:1.5rem}.chip{font-size:.72rem;padding:.12rem .5rem;border-radius:999px;border:1px solid var(--border);background:var(--surface-2);color:var(--text-dim);white-space:nowrap}.chip.known{background:var(--accent);border-color:var(--accent);color:#fff}.chip.taught{background:var(--accent-soft);border-color:var(--accent);color:var(--text)}.chip.weak{background:var(--danger-soft);border-color:var(--danger);color:var(--text)}.chip.next{background:var(--surface);border-color:var(--accent);color:var(--accent)}.chip.locked{opacity:.6}.cat-block{margin:1rem 0 1.25rem}.cat-title{font-size:.95rem;margin:0 0 .5rem;letter-spacing:-.01em}.cat-en{color:var(--text-dim);font-weight:400;font-size:.85rem}.node-row{display:flex;gap:.45rem;flex-wrap:wrap}.node{font:inherit;font-size:.95rem;font-weight:600;padding:.4rem .75rem;border-radius:9px;border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;transition:transform .1s ease}.node:hover{transform:translateY(-1px);border-color:var(--accent)}.node.known{background:var(--accent);border-color:var(--accent);color:#fff}.node.taught{background:var(--accent-soft);border-color:var(--accent)}.node.weak{background:var(--danger-soft);border-color:var(--danger)}.node.next{border-color:var(--accent);border-style:dashed}.node.locked{opacity:.5}button.tile{text-align:left;font:inherit;cursor:pointer;width:100%}.sheet-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#14120f73;display:flex;align-items:flex-start;justify-content:center;padding:2rem 1rem;overflow-y:auto;z-index:50}.sheet{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:0 12px 40px #00000040;padding:1.5rem;max-width:42rem;width:100%}.chunk.ok{border-color:var(--accent);background:var(--accent-soft)}.chunk.bad{border-color:var(--danger);background:var(--danger-soft)}.card-list{display:flex;flex-direction:column;gap:.75rem}.phrase{transition:border-color .15s ease}.phrase.done{border-color:var(--accent);background:var(--accent-soft)}.phrase-ko{font-size:1.35rem;font-weight:600;letter-spacing:-.01em}.raw{margin-top:.6rem;font-size:.85rem;color:var(--text-dim)}.raw-text{font-style:italic;text-decoration:line-through}.mic{font-size:2rem;width:5rem;height:5rem;border-radius:999px;border:2px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;transition:border-color .15s ease,background .15s ease}.mic:hover{border-color:var(--accent)}.mic.on{border-color:var(--danger);background:var(--danger-soft);animation:pulse 1.4s ease-in-out infinite}@keyframes pulse{0%,to{box-shadow:0 0 #a8412f59}50%{box-shadow:0 0 0 12px #a8412f00}}@media (prefers-reduced-motion: reduce){.mic.on{animation:none}}.mic-hint{text-align:center;color:var(--text-dim);font-size:.9rem;margin:0}.fine-print{color:var(--text-dim);font-size:.82rem;line-height:1.5;margin:1rem 0 0}.node.word{cursor:default;font-weight:500;font-size:.9rem;padding:.3rem .6rem}.node.word:hover{transform:none}.lang-select{font:inherit;font-size:.85rem;padding:.3rem .5rem;border-radius:8px;border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer}.table-scroll{overflow-x:auto}.matrix{border-collapse:collapse;width:100%;font-size:.9rem}.matrix th,.matrix td{border:1px solid var(--border);padding:.6rem .75rem;text-align:left;vertical-align:top}.matrix thead th{background:var(--surface-2);white-space:nowrap}.matrix tbody th{font-weight:600;max-width:22rem}.matrix td{text-align:center;font-variant-numeric:tabular-nums}.matrix .current{background:var(--accent-soft)}.pct{font-weight:700;font-size:1.05rem}.pct.full{color:var(--accent)}.pct.none{color:var(--text-dim)}.matrix td.warn{color:var(--danger);font-weight:600}.code-cell{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.85rem;background:var(--surface-2);padding:.15rem .4rem;border-radius:6px;white-space:nowrap}.add-grid{display:grid;gap:.75rem;grid-template-columns:repeat(auto-fit,minmax(12rem,1fr))}.add-grid label{display:flex;flex-direction:column;gap:.25rem}