:root{--ink:#17181c;--ink-2:#212227;--ink-3:#2c2d33;--paper:#f1ead9;--paper-dim:#b9b09c;--gold:#c9a45c;--gold-dim:#c9a45c59;--vermilion:#b8382a;--wood:#ddb163;--radius:6px;--font-serif:"Hiragino Mincho ProN", "Yu Mincho", YuMincho, "Noto Serif JP", "BIZ UDPMincho", serif;--font-sans:"Hiragino Sans", "Yu Gothic UI", "Noto Sans JP", system-ui, sans-serif}*{box-sizing:border-box}html,body{background:var(--ink);min-height:100%;color:var(--paper);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;overscroll-behavior:none;width:100%;margin:0;overflow-x:clip}body{background:radial-gradient(ellipse at 50% -10%, #c9a45c1a, transparent 60%), radial-gradient(ellipse at 50% 120%, #b8382a12, transparent 55%), var(--ink);-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent}button{font:inherit;color:inherit;cursor:pointer}.app{min-height:100dvh}.btn{border:1px solid var(--gold-dim);border-radius:var(--radius);background:var(--ink-2);min-width:220px;font-family:var(--font-serif);letter-spacing:.12em;padding:12px 28px;font-size:17px;transition:background .15s,border-color .15s,transform 80ms}.btn:hover{border-color:var(--gold);background:var(--ink-3)}.btn:active{transform:translateY(1px)}.btn-primary{background:var(--paper);color:var(--ink);border-color:var(--paper);font-weight:600}.btn-primary:hover{background:#fff8e6;border-color:#fff8e6}.btn-large{padding:15px 32px;font-size:20px}.icon-btn{border:1px solid var(--gold-dim);background:var(--ink-2);border-radius:50%;width:40px;height:40px;font-size:17px;line-height:1}.icon-btn:hover{border-color:var(--gold)}.screen{flex-direction:column;justify-content:center;align-items:center;gap:22px;min-height:100dvh;padding:32px 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var(--vermilion);width:38px;height:38px;color:var(--vermilion);font-family:var(--font-serif);opacity:.9;border-radius:4px;place-items:center;font-size:22px;font-weight:700;display:grid;position:absolute;top:58px;right:-34px;transform:rotate(6deg)}.mode-select{border:1px solid var(--gold-dim);border-radius:var(--radius);gap:0;display:flex;overflow:hidden}.mode-btn{color:var(--paper-dim);font-family:var(--font-serif);letter-spacing:.06em;background:0 0;border:none;padding:10px 20px;font-size:15px}.mode-btn+.mode-btn{border-left:1px solid var(--gold-dim)}.mode-btn.selected{background:var(--gold);color:var(--ink);font-weight:600}.mode-btn:not(.selected):hover{color:var(--paper);background:var(--ink-2)}.best-score{font-family:var(--font-serif);color:var(--paper-dim);letter-spacing:.1em;font-size:14px}.best-score 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var(--gold-dim);border-radius:var(--radius);flex-direction:column;align-items:center;gap:4px;padding:8px;display:flex}.panel-label{font-family:var(--font-serif);letter-spacing:.15em;color:var(--gold);align-self:flex-start;font-size:12px}.preview{display:block}.stats{align-items:stretch;gap:8px}.stat{flex-direction:column;display:flex}.stat-label{color:var(--paper-dim);letter-spacing:.1em;font-size:11px}.stat-value{font-family:var(--font-serif);font-variant-numeric:tabular-nums;font-size:22px;line-height:1.2}.stat-best .stat-value{color:var(--paper-dim);font-size:15px}.board-wrap{border-radius:3px;position:relative;box-shadow:0 0 0 3px #4a2e12,0 12px 30px #0000008c}.board{border-radius:2px;display:block}.board-loading{color:var(--ink);place-items:center;display:grid;position:absolute;inset:0}.overlay{-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);background:#17181cd1;flex-direction:column;justify-content:center;align-items:center;gap:12px;padding:16px;display:flex;position:absolute;inset:0}.overlay .btn{width:min(220px,100%);min-width:0}.overlay-title{font-family:var(--font-serif);letter-spacing:.3em;margin-bottom:4px;padding-left:.3em;font-size:30px}.overlay-score{font-family:var(--font-serif);font-size:24px}.overlay-record{color:var(--gold);margin-top:-4px;font-size:14px}.touch-controls{flex-direction:column;gap:8px;width:min(100%,440px);margin-top:12px;display:none}.touch-row{gap:8px;display:flex}.touch-btn{border:1px solid var(--gold-dim);background:var(--ink-2);touch-action:none;border-radius:10px;flex:1;height:56px;font-size:22px}.touch-btn.small{font-size:12px;line-height:1.3}.touch-btn:active{background:var(--ink-3);border-color:var(--gold)}@media (hover:none),(max-width:719px){.touch-controls{display:flex}}@media (max-width:719px){.game-body{gap:8px}.side{gap:8px;width:64px}.panel{padding:5px 4px}.panel-label{letter-spacing:.05em;font-size:10px}.stat-value{font-size:15px}.stat-best .stat-value{font-size:12px}.stat-label{font-size:10px}.game-title{font-size:15px}.key-hint{display:none}.title-seal{width:32px;height:32px;font-size:18px;right:-18px}}