:root{--ink:#f2fbff;--muted:#a9c7d6;--cyan:#49e7ff;--violet:#b770ff;--rose:#ff526a;--amber:#ffb75d;--panel:#030b1a9e;--panel-strong:#081227db;--border:#86e3ff57;--shadow:#0000006b 0 18px 42px;--font:Inter, ui-sans-serif, system-ui, "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;color:var(--ink);font:16px/1.35 var(--font);letter-spacing:0;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:#02040c}*{box-sizing:border-box}html,body,#app{width:100%;height:100%;margin:0;overflow:hidden}button{font:inherit}.game-shell{background:radial-gradient(circle at 50% 30%,#36caff2e,#0000 38%),linear-gradient(#06172c 0%,#02040c 62%,#09030d 100%);width:100%;height:100%;min-height:100svh;position:relative;overflow:hidden}.game-canvas{z-index:1;position:absolute;inset:0}.game-canvas canvas{width:100%;height:100%;display:block}.start-screen{z-index:10;opacity:1;pointer-events:auto;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);background:radial-gradient(circle at 50% 38%,#49e7ff33,#0000 34%),#00020870;place-items:center;padding:22px;transition:opacity .18s;display:grid;position:absolute;inset:0}.start-screen.is-hidden{opacity:0;pointer-events:none}.start-ambient{pointer-events:none;position:absolute;inset:0;overflow:hidden}.start-crystal,.start-spark{opacity:.72;pointer-events:none;filter:drop-shadow(0 0 18px #49e7ffad);position:absolute}.start-crystal{clip-path:polygon(50% 0%,78% 22%,66% 100%,34% 100%,22% 22%);background:linear-gradient(110deg,#ffffffe6,#0000 24%),linear-gradient(#60efffe0,#b770ff9e);width:26px;height:54px;animation:5.2s ease-in-out infinite startCrystalFloat}.start-crystal-one{top:38%;left:12%}.start-crystal-two{filter:drop-shadow(0 0 18px 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14px}.settings-button{min-width:62px;min-height:34px;font-size:12px}.settings-panel{width:min(92vw,350px);padding:14px}.setting-slider{grid-template-columns:1fr;gap:8px}.setting-slider strong{text-align:left}.difficulty-panel{gap:5px;padding:6px}.difficulty-button{min-height:32px;padding:0 10px}}@media (prefers-reduced-motion:reduce){.game-over,.restart-button,.leaderboard-overlay,.settings-overlay,.start-screen{transition:none}.start-crystal,.start-spark,.start-panel,.start-panel:before,.stat:after,.planet-node.is-active,.combo-chip:not([hidden]),.stat strong.score-counting,.score-star{animation:none}}