@charset "UTF-8";:root{--bg: #0a0a0a;--surface: #111111;--border: #2e2e2e;--fg: #e8e8e8;--muted: #aaaaaa;--accent: #00ff88;--accent-dim: rgba(0, 255, 136, .15);--user-color: #7ec8e3;--error-color: #ff4444;--cell-bg: #0e0e0e;--cell-given: #0a0a0a;--cell-selected: #0d1f12;--cell-hl: #121212;--cell-same: #131308}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{height:100%;background:#0a0a0a}body{height:100%;min-height:100dvh}body{background:var(--bg);color:var(--fg);font-family:Courier New,Lucida Console,monospace;font-size:17px;line-height:1.5;-webkit-font-smoothing:antialiased;overflow-x:hidden;overscroll-behavior:none}button,input{color:inherit;font-family:inherit;font-size:inherit;cursor:pointer;-webkit-tap-highlight-color:transparent}html{overscroll-behavior:none}body{padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom)}::-webkit-scrollbar{width:4px}::-webkit-scrollbar-track{background:var(--bg)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}::-webkit-scrollbar-thumb:hover{background:var(--accent)}.btn-primary{background:transparent;border:1px solid var(--accent);border-radius:6px;color:var(--accent);cursor:pointer;font-family:inherit;font-size:.75rem;font-weight:700;letter-spacing:.2em;padding:.75rem 2rem;transition:all .2s}.btn-primary:hover:not(:disabled){background:var(--accent-dim);box-shadow:0 0 20px #00ff8840}.btn-primary:disabled{opacity:.4;cursor:not-allowed}.btn-ghost{background:transparent;border:1px solid var(--border);border-radius:6px;color:var(--muted);cursor:pointer;font-family:inherit;font-size:.7rem;letter-spacing:.1em;padding:.5rem 1rem;transition:all .2s}.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}@keyframes fade-up{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}.fade-up{animation:fade-up .4s ease forwards}