:root{--bg: #0c1220;--bg2: #131c30;--panel: #182338;--border: #2a3d5c;--text: #dce6f5;--text-dim: #8ba0bf;--accent: #3ee6c0;--warn: #ffcc66}*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,Hiragino Sans,Noto Sans JP,sans-serif;background:linear-gradient(180deg,var(--bg) 0%,var(--bg2) 100%);color:var(--text);min-height:100vh}a{color:var(--accent)}.site-header{display:flex;align-items:center;gap:1.5rem;padding:.8rem 1.5rem;border-bottom:1px solid var(--border)}.site-header .brand{font-weight:700;color:var(--text);text-decoration:none;font-size:1.1rem}.site-header nav{display:flex;gap:1rem}.site-header nav a{color:var(--text-dim);text-decoration:none;font-size:.95rem}.site-header nav a:hover{color:var(--accent)}main{max-width:900px;margin:0 auto;padding:2rem 1.5rem 4rem}.site-footer{border-top:1px solid var(--border);color:var(--text-dim);font-size:.85rem;text-align:center;padding:1.5rem}.notice{background:#ffcc6614;border:1px solid rgba(255,204,102,.4);border-radius:8px;padding:.8rem 1rem;color:var(--warn);font-size:.9rem}.mobile-warning{display:none}@media(pointer:coarse){.mobile-warning{display:block;margin-bottom:1rem}}.btn{display:inline-block;background:var(--accent);color:#06281f;font-weight:700;border:none;border-radius:8px;padding:.7rem 1.6rem;font-size:1rem;cursor:pointer;text-decoration:none}.btn:hover{filter:brightness(1.1)}.card{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:1.2rem 1.4rem}.game-layout{display:grid;grid-template-columns:1fr 300px;gap:1rem;max-width:1200px;margin:1rem auto;padding:0 1rem}.game-root{position:relative;aspect-ratio:16 / 9;border:1px solid var(--border);border-radius:10px;overflow:hidden;background:linear-gradient(180deg,#16213a,#0c1220 60%)}.game-root canvas{display:block;width:100%;height:100%}.game-root:fullscreen{aspect-ratio:auto;width:100vw;height:100vh;border:none;border-radius:0}.hud{position:absolute;inset:0;pointer-events:none}.hud-stats{position:absolute;top:.8rem;left:50%;transform:translate(-50%);display:flex;gap:1.5rem;font-size:1.2rem;font-weight:700;font-variant-numeric:tabular-nums;text-shadow:0 1px 3px rgba(0,0,0,.8)}.hud-timer:before{content:"⏱ "}.hud-acc{color:var(--text-dim)}.hud-crosshair{--ch-color: #00ff88;--ch-size: 6px;position:absolute;top:50%;left:50%;width:0;height:0}.hud-crosshair:before,.hud-crosshair:after{content:"";position:absolute;background:var(--ch-color)}.hud-crosshair:before{width:calc(var(--ch-size) * 2 + 4px);height:2px;left:calc(-1 * var(--ch-size) - 2px);top:-1px}.hud-crosshair:after{width:2px;height:calc(var(--ch-size) * 2 + 4px);top:calc(-1 * var(--ch-size) - 2px);left:-1px}.game-overlay{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem;background:#080c16d1;text-align:center;padding:1rem}.game-overlay[hidden]{display:none}.game-overlay h2{margin:0}.result-stats{display:grid;grid-template-columns:repeat(2,minmax(120px,1fr));gap:.4rem 2rem;font-variant-numeric:tabular-nums;text-align:left}.result-stats dt{color:var(--text-dim);font-size:.85rem}.result-stats dd{margin:0 0 .5rem;font-size:1.3rem;font-weight:700}.new-best{color:var(--accent);font-weight:700}.settings-panel{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:1rem 1.2rem;font-size:.9rem;align-self:start}.settings-panel h2{margin:0 0 .8rem;font-size:1rem}.settings-panel label{display:block;margin-bottom:.7rem;color:var(--text-dim)}.settings-panel input,.settings-panel select{display:block;width:100%;margin-top:.25rem;background:var(--bg);color:var(--text);border:1px solid var(--border);border-radius:6px;padding:.4rem .5rem;font-size:.9rem}.settings-panel input[type=range],.settings-panel input[type=color]{padding:0;border:none;background:none}.settings-cm360{color:var(--accent);margin:.2rem 0 .8rem}.settings-note{color:var(--text-dim);font-size:.8rem;margin:.2rem 0 .8rem}@media(max-width:900px){.game-layout{grid-template-columns:1fr}}.conv-form{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-bottom:1.5rem}.conv-form label{display:block;color:var(--text-dim);font-size:.9rem}.conv-form input,.conv-form select{display:block;width:100%;margin-top:.25rem;background:var(--panel);color:var(--text);border:1px solid var(--border);border-radius:6px;padding:.5rem .6rem;font-size:1rem}table.conv-table{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums}table.conv-table th,table.conv-table td{border-bottom:1px solid var(--border);padding:.55rem .6rem;text-align:left}table.conv-table th{color:var(--text-dim);font-weight:600;font-size:.85rem}.hero{text-align:center;padding:2.5rem 0 2rem}.hero h1{font-size:2.2rem;margin:0 0 .6rem}.hero p{color:var(--text-dim);margin:0 0 1.5rem}.mode-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1rem;margin:2rem 0}.mode-card h3{margin-top:0}.mode-card .coming-soon{opacity:.55}.badge{display:inline-block;font-size:.75rem;border:1px solid var(--border);border-radius:999px;padding:.1rem .6rem;color:var(--text-dim);margin-left:.5rem}.prose{line-height:1.9}.prose h1{font-size:1.8rem}.prose h2{margin-top:2.2rem;border-bottom:1px solid var(--border);padding-bottom:.3rem}.prose code{background:var(--panel);border-radius:4px;padding:.1rem .4rem}