:root{--bg:#eef3fb;--card:#fff;--line:#dde4f0;--text:#1f2633;--muted:#6b7486;--accent:#3d5afe;--accent-2:#2a3fd1;--red:#ff5d5d;--star:#ffb300;--ok:#1b9e5a;--radius:16px;--font:"Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;--mono:ui-monospace, "SF Mono", "JetBrains Mono", Consolas, monospace}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);min-height:100vh;color:var(--text);font-family:var(--font);-webkit-font-smoothing:antialiased;line-height:1.55}button,input{font:inherit;color:inherit}button{cursor:pointer;background:0 0;border:0}button:disabled{cursor:not-allowed;opacity:.5}[hidden]{display:none!important}#app{max-width:920px;margin:0 auto;padding:16px 16px 48px}.btn{background:var(--card);border:1px solid var(--line);border-radius:12px;justify-content:center;align-items:center;gap:6px;min-height:44px;padding:0 16px;font-size:15px;font-weight:700;transition:transform .1s;display:inline-flex}.btn:active:not(:disabled){transform:scale(.97)}.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff;box-shadow:0 6px 16px #3d5afe4d}.btn.primary:hover:not(:disabled){background:var(--accent-2)}.btn.ghost{background:0 0;border-color:#0000;padding:0 8px}.btn.big{min-height:52px;padding:0 22px;font-size:17px}.hero{text-align:center;padding:28px 0 20px}.hero h1{letter-spacing:-.02em;font-size:36px;font-weight:900}.hero p{color:var(--muted);word-break:keep-all;margin:8px 0 18px}.hero-row{flex-wrap:wrap;justify-content:center;align-items:center;gap:14px;display:flex}.total-stars{color:var(--star);font-size:17px;font-weight:800}.chapter{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);margin-top:14px;padding:16px}.chapter h2{flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:12px;font-size:17px;display:flex}.chapter h2 span{background:var(--accent);color:#fff;border-radius:8px;place-items:center;width:26px;height:26px;font-size:14px;display:inline-grid}.chapter h2 small{color:var(--muted);font-size:13px;font-weight:500}.level-grid{grid-template-columns:repeat(auto-fill,minmax(56px,1fr));gap:8px;display:grid}.level{aspect-ratio:1;border:1px solid var(--line);background:#f4f6fb;border-radius:12px;flex-direction:column;justify-content:center;align-items:center;gap:2px;display:flex}.level b{font-size:17px}.level small{color:var(--star);letter-spacing:-1px;min-height:12px;font-size:10px}.level.cleared{background:#e9edff;border-color:#b9c4ff}.level.locked{opacity:.45}.level:not(.locked):hover{border-color:var(--accent)}.foot{text-align:center;color:var(--muted);margin-top:24px;font-size:13px}.topbar{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.topbar strong{font-size:18px}.topbar .best{color:var(--star);text-align:end;min-width:60px;font-weight:800}.tip{word-break:keep-all;background:#fff8e1;border:1px solid #ffe08a;border-radius:12px;margin-bottom:10px;padding:10px 14px;font-size:14px}.board-wrap{border-radius:var(--radius);border:1px solid var(--line);background:#fbfaf6;overflow:hidden;box-shadow:0 8px 24px #1f263314}#board{touch-action:none;width:100%;display:block}.status{color:var(--muted);margin:10px 2px;font-size:14px}.status b{color:var(--text)}.fire{background:var(--card);border:2px solid var(--line);border-radius:14px;align-items:center;gap:8px;padding:6px 6px 6px 14px;display:flex}.fire:focus-within{border-color:var(--accent)}.fire label{font-family:var(--mono);color:var(--accent);white-space:nowrap;font-weight:800}.fire input{min-width:0;font-family:var(--mono);background:0 0;border:0;outline:none;flex:1;padding:8px 0;font-size:18px}.keys{grid-template-columns:repeat(10,minmax(0,1fr));gap:6px;margin-top:8px;display:grid}.keys button{background:var(--card);border:1px solid var(--line);min-height:40px;font-family:var(--mono);border-radius:10px;font-size:14px;font-weight:700}.keys button:active{background:#e9edff}.error{color:#d32f2f;min-height:1.4em;margin:6px 2px 0;font-size:14px;font-weight:600}.actions{gap:8px;margin-top:4px;display:flex}.hint-text{background:#eef7ff;border:1px solid #bcdcff;border-radius:12px;margin-top:10px;padding:10px 14px;font-size:14px}code{font-family:var(--mono);background:#3d5afe14;border-radius:6px;padding:1px 6px}.history{gap:6px;margin-top:14px;list-style:none;display:grid}.history li{background:var(--card);border:1px solid var(--line);border-radius:10px;justify-content:space-between;align-items:center;gap:8px;padding:6px 10px;font-size:13px;display:flex}.history button{font-family:var(--mono);text-align:start;text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.history span{color:var(--muted);white-space:nowrap}.modal{z-index:50;background:#0f142373;place-items:center;padding:16px;display:grid;position:fixed;inset:0}.modal-card{background:var(--card);text-align:center;border-radius:20px;width:100%;max-width:420px;padding:26px 22px;animation:.35s cubic-bezier(.2,1.3,.4,1) pop}@keyframes pop{0%{opacity:0;transform:scale(.85)}to{opacity:1;transform:none}}.modal-eyebrow{color:var(--muted);font-weight:700}.modal-card h2{margin:4px 0;font-size:28px}.modal-stars{color:var(--star);letter-spacing:4px;font-size:40px}.modal-line{margin-top:4px}.modal-solution{color:var(--muted);word-break:break-all;margin-top:12px;font-size:13px}.modal-actions{flex-wrap:wrap;justify-content:center;gap:8px;margin-top:18px;display:flex}.modal-actions .big{width:100%}.modal-hint{color:var(--muted);margin-top:12px;font-size:13px}@media (max-width:480px){.hero h1{font-size:30px}.keys{grid-template-columns:repeat(5,minmax(0,1fr))}.fire input{font-size:16px}}