:root{--bg: #f4f1e6;--ink: #1d1c19;--muted: #6b675c;--line: #d9d4c4;--card: #fbf9f2;--accent: #1c3a28;--accent-ink: #f4f1e6;--good: #1f6b3a;--bad: #a8412a;--radius: 16px;--controls-h: 120px}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.5 system-ui,-apple-system,Segoe UI,Roboto,Apple SD Gothic Neo,Noto Sans KR,Malgun Gothic,sans-serif;min-height:100dvh}a{color:var(--accent)}main{max-width:720px;margin:0 auto;padding:16px 16px calc(var(--controls-h) + env(safe-area-inset-bottom))}h1{font-size:1.4rem;line-height:1.25;margin:0 0 8px}h2{font-size:1.2rem;margin:0 0 8px}p{margin:0 0 12px}.muted{color:var(--muted)}.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:.9rem;margin-bottom:12px}.topbar nav a{margin-left:10px}.topbar .brand{font-weight:600;letter-spacing:.02em;text-decoration:none;color:var(--ink)}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin-bottom:16px}.btn{appearance:none;border:0;border-radius:14px;min-height:64px;padding:12px 16px;font:inherit;font-size:1.15rem;font-weight:600;cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent}.btn-primary{background:var(--accent);color:var(--accent-ink);width:100%}.btn-secondary{background:var(--card);color:var(--ink);border:1px solid var(--line);width:100%}.btn:disabled{opacity:.55;cursor:default}.btn[aria-pressed=true]{outline:3px solid var(--accent);outline-offset:2px}#stage,#controls{touch-action:manipulation;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none}#figure{width:100%;height:220px;line-height:0}#figure svg{width:100%;height:100%;display:block}#progress{font-size:.9rem;color:var(--muted);margin:0 0 8px}#prompt{font-size:1.05rem;font-weight:600;margin:12px 0 6px}#feedback{min-height:1.6em;margin:0;font-weight:600}#feedback[data-state=correct]{color:var(--good)}#feedback[data-state=wrong]{color:var(--bad)}#controls{position:fixed;left:0;right:0;bottom:0;display:grid;grid-template-columns:1fr 1fr;gap:12px;padding:12px 16px calc(12px + env(safe-area-inset-bottom));background:var(--bg);border-top:1px solid var(--line)}#controls .btn{display:flex;align-items:center;justify-content:center;gap:10px}.key{display:none;font:600 .75rem/1 ui-monospace,SF Mono,Menlo,Consolas,monospace;color:var(--muted);border:1px solid var(--line);border-radius:6px;padding:3px 6px;min-width:1.6em;text-align:center}.keys{display:none;font-size:.85rem;margin:0 0 12px}@media(pointer:fine){.key{display:inline-block}.keys{display:block}}@media(min-width:720px){#controls{padding-left:calc((100vw - 720px)/2 + 16px);padding-right:calc((100vw - 720px)/2 + 16px)}}@media(max-height:520px){:root{--controls-h: 72px}main{padding-top:8px}.topbar{margin-bottom:6px}#progress{margin-bottom:4px}#prompt{font-size:.95rem;margin:6px 0 2px}#feedback{min-height:1.4em}#controls{padding-top:8px;padding-bottom:calc(8px + env(safe-area-inset-bottom));gap:10px}#controls .btn{min-height:48px;font-size:1rem;padding:8px 12px}}.picker{border:0;padding:0;margin:0 0 12px;min-width:0}.picker legend{font-weight:600;padding:0;margin-bottom:8px}.picker-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}@media(min-width:560px){.picker-grid{grid-template-columns:repeat(4,1fr)}}.picker-option{position:relative;display:flex;flex-direction:column;gap:2px;min-height:44px;padding:8px 10px;border:1px solid var(--line);border-radius:12px;background:var(--bg);cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent}.picker-option input{position:absolute;opacity:0;width:1px;height:1px;margin:0;pointer-events:none}.picker-level{font-weight:600}.picker-meaning{font-size:.8rem;line-height:1.3;color:var(--muted)}.picker-option input:checked~.picker-level{color:var(--accent)}.picker-option:has(input:checked){border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent);background:var(--card)}.picker-option:has(input:focus-visible){outline:3px solid var(--accent);outline-offset:2px}.btn-suggest{background:var(--card);color:var(--accent);border:2px solid var(--accent);width:100%;margin-bottom:12px}#results ul{list-style:none;padding:0;margin:0 0 12px}#results li{padding:6px 0;border-bottom:1px solid var(--line)}#results li:last-child{border-bottom:0}#results .actions{display:grid;gap:12px;margin-top:12px}footer{margin-top:24px;font-size:.85rem;color:var(--muted)}#stage:not([hidden])~footer{display:none}[hidden]{display:none!important}