:root{--bg: #0e1116;--panel: #181d25;--line: #2a323d;--ink: #eef3f7;--dim: #93a4b3;--accent: #5bbf8a;--tile: #222c36;--tile2: #2a3744;--changed: #1f3d3a;--bad: #5a1f26}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:radial-gradient(900px 560px at 50% -8%,#16202a,var(--bg));color:var(--ink);font-family:system-ui,-apple-system,Segoe UI,sans-serif;display:flex;justify-content:center;-webkit-user-select:none;user-select:none}#app{width:100%;max-width:520px;padding:12px 12px 26px}header{text-align:center;margin-bottom:6px}h1{margin:0;font-size:28px;letter-spacing:6px;font-weight:800;color:var(--accent)}.sub{margin:3px 0 0;color:var(--dim);font-size:13px}.bar{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;align-items:center;margin:10px 0}.seg{display:inline-flex;background:var(--panel);border:1px solid var(--line);border-radius:999px;overflow:hidden}.seg button{background:none;border:none;color:var(--dim);padding:6px 13px;font:600 13px system-ui;cursor:pointer}.seg button.active{background:var(--accent);color:#06201b}.btn{background:var(--panel);border:1px solid var(--line);color:var(--ink);padding:7px 14px;border-radius:999px;font:700 13px system-ui;cursor:pointer}.btn:hover{border-color:var(--accent)}.btn.primary{background:var(--accent);color:#06201b;border-color:var(--accent)}.scoreboard{display:flex;gap:10px;justify-content:center;margin:8px 0}.readout{background:#0a0e13;border:1px solid var(--line);border-radius:8px;padding:5px 14px;font:800 18px ui-monospace,monospace;color:var(--accent);min-width:72px;text-align:center}.readout span{color:var(--dim);font-size:11px;display:block;font-weight:600;letter-spacing:.5px}.goal{display:flex;align-items:center;justify-content:center;gap:12px;margin:12px 0 6px}.goal .word{font:800 22px ui-monospace,monospace;letter-spacing:3px;padding:8px 14px;border-radius:8px;border:1px solid var(--line)}.goal .startword{background:var(--panel);color:var(--ink)}.goal .targetword{background:#11281f;color:var(--accent);border-color:var(--accent)}.goal .arrow{color:var(--dim);font-size:22px}.stage{position:relative;display:flex;justify-content:center}.ladder{display:flex;flex-direction:column;gap:5px;align-items:center;width:100%;min-height:60px;padding:6px 0;max-height:320px;overflow-y:auto}.rung{display:flex;gap:5px}.lr{display:flex;align-items:center;justify-content:center;width:38px;height:42px;background:var(--tile);border:1px solid var(--line);border-radius:6px;font:800 20px ui-monospace,monospace;color:var(--ink)}.lr.changed{background:var(--changed);border-color:var(--accent);color:var(--accent)}.rung.start .lr{background:var(--panel);color:var(--dim)}.rung.target .lr{background:#11281f;border-color:var(--accent);color:var(--accent);box-shadow:0 0 0 1px var(--accent) inset}.overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#080c10d1;border-radius:8px;backdrop-filter:blur(3px)}.overlay.hidden{display:none}.card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:22px 26px;text-align:center;max-width:340px}.card h2{margin:0 0 6px;font-size:24px;color:var(--accent)}.card p{margin:6px 0;color:var(--ink);font-size:15px}.card p.par{color:var(--dim);font-size:13px}.card .row{display:flex;gap:8px;justify-content:center;margin-top:14px}.entry{margin:10px auto 0;max-width:360px}.tiles{display:flex;gap:5px;justify-content:center;margin-bottom:8px}.tile{display:flex;align-items:center;justify-content:center;width:38px;height:42px;background:var(--tile2);border:1px solid var(--line);border-radius:6px;font:800 20px ui-monospace,monospace;color:var(--ink);cursor:pointer}.tile:hover{border-color:var(--accent);color:var(--accent)}.inputrow{display:flex;gap:8px;justify-content:center}#wordinput{flex:1;background:#0a0e13;border:1px solid var(--line);color:var(--ink);border-radius:8px;padding:10px 12px;font:800 18px ui-monospace,monospace;letter-spacing:3px;text-transform:uppercase;text-align:center;outline:none}#wordinput:focus{border-color:var(--accent)}.msg{text-align:center;color:#ff9aa6;font-size:13px;min-height:18px;margin-top:8px;font-weight:600}.pad{display:flex;gap:8px;justify-content:center;margin:12px auto 0;max-width:360px}.pad .btn{flex:1}.hint{text-align:center;color:var(--dim);font-size:12px;margin-top:12px;line-height:1.5}@keyframes shake{10%,90%{transform:translate(-1px)}20%,80%{transform:translate(2px)}30%,50%,70%{transform:translate(-4px)}40%,60%{transform:translate(4px)}}.shake{animation:shake .4s cubic-bezier(.36,.07,.19,.97) both}