:root{--ink:#0b111b;--paper:#f5f7fb;--accent:#ffd23f;--accent-ink:#1b2230;--panel:#1b2230;--safe-top:env(safe-area-inset-top,0px);--safe-bottom:env(safe-area-inset-bottom,0px)}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{background:var(--ink);height:100%;color:var(--paper);-webkit-user-select:none;user-select:none;touch-action:none;overscroll-behavior:none;margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Noto Sans SC,Segoe UI,sans-serif;overflow:hidden}#stage{z-index:0;position:fixed;inset:0}#scene{width:100%;height:100%;display:block}.overlay{z-index:20;-webkit-backdrop-filter:blur(8px);opacity:0;pointer-events:none;background:#060a128c;justify-content:center;align-items:center;padding:16px;transition:opacity .18s;display:flex;position:fixed;inset:0}.overlay.visible{opacity:1;pointer-events:auto}.panel{text-align:center;background:linear-gradient(160deg,#223049,#131a26);border:3px solid #ffffff24;border-radius:26px;flex-direction:column;gap:14px;width:min(92vw,420px);max-height:92vh;padding:26px 22px;display:flex;overflow-y:auto;box-shadow:0 24px 60px #0000008c}.panel.narrow{width:min(88vw,340px)}.panel.lobby{text-align:left;grid-template-columns:minmax(0,1fr) 252px;align-items:start;gap:16px;width:min(94vw,780px);max-height:94vh;padding:18px;display:grid}.lobby-left{flex-direction:column;gap:10px;min-width:0;display:flex}.lobby-right{min-width:0}.lobby-left .code{letter-spacing:6px;font-size:30px}.lobby-left .peers{max-height:34vh;overflow-y:auto}.lobby-left .hint,.lobby-left .status{text-align:center}@media (orientation:portrait){.panel.lobby{grid-template-columns:1fr;max-width:min(92vw,420px)}}.title{letter-spacing:-1px;text-shadow:0 4px #00000059;margin:0;font-size:40px;font-weight:900;line-height:1}.title span{color:var(--accent)}.title.small{font-size:26px}.sub{color:#9fb3c8;margin:0;font-size:13px}.field{text-align:left;color:#9fb3c8;flex-direction:column;gap:6px;font-size:13px;display:flex}input:not([type=checkbox]):not([type=range]){width:100%;color:var(--paper);background:#00000047;border:2px solid #ffffff29;border-radius:14px;outline:none;padding:13px 14px;font-size:16px}input:not([type=checkbox]):not([type=range]):focus{border-color:var(--accent)}input[type=checkbox]{width:22px;height:22px;accent-color:var(--accent)}input[type=range]{accent-color:var(--accent);background:0 0;padding:0}.join-row{gap:8px;display:flex}.join-row input{text-transform:uppercase;letter-spacing:3px;flex:1;font-weight:700}.btn{color:var(--paper);cursor:pointer;background:#ffffff1a;border:none;border-radius:16px;padding:15px 18px;font-size:17px;font-weight:700;transition:transform 80ms,filter .15s}.btn:active{filter:brightness(.92);transform:scale(.97)}.btn.primary{background:var(--accent);color:var(--accent-ink);box-shadow:0 6px #0000004d}.btn.ghost{color:#9fb3c8;background:0 0;border:2px dashed #ffffff40;padding:10px;font-size:14px}.hint{color:#7d90a6;margin:0;font-size:12px}.status{color:var(--accent);min-height:16px;margin:0;font-size:12px}.room-head{align-items:baseline;gap:10px;display:flex}.room-head .label{color:#7d90a6;font-size:12px}.code{letter-spacing:8px;color:var(--accent);text-indent:8px;font-size:36px;font-weight:900}.peers{flex-direction:column;gap:8px;margin:0;padding:0;list-style:none;display:flex}.peers li{text-align:left;background:#ffffff12;border-radius:14px;align-items:center;gap:10px;padding:11px 14px;font-size:15px;display:flex}.peers li i,.results li i{border-radius:50%;flex:none;width:14px;height:14px;box-shadow:inset 0 0 0 2px #00000059}.peers li em{color:var(--accent);margin-left:auto;font-size:11px;font-style:normal}.peers li b{color:#7cf07c;margin-left:auto;font-size:11px}.results{flex-direction:column;gap:8px;margin:0;padding:0;list-style:none;display:flex}.results li{background:#ffffff12;border-radius:14px;align-items:center;gap:12px;padding:12px 14px;font-size:15px;display:flex}.results .rank{color:var(--accent);width:22px;font-size:18px;font-weight:900}.hud{z-index:10;pointer-events:none;opacity:0;transition:opacity .2s;position:fixed;inset:0}.hud.visible{opacity:1}.hud-row{top:calc(var(--safe-top) + 10px);align-items:center;gap:8px;display:flex;position:absolute;left:12px;right:12px}.hud-chip{pointer-events:auto;-webkit-backdrop-filter:blur(6px);color:var(--paper);background:#080d16a8;border:2px solid #ffffff1a;border-radius:14px;align-items:baseline;gap:3px;padding:8px 12px;font-size:20px;font-weight:800;line-height:1;display:inline-flex}.hud-chip b{font-size:22px}.hud-chip .dim{color:#8fa2b8;font-size:11px;font-weight:600}.hud-chip.speed{margin-left:auto}.hud-chip.speed b{color:var(--accent);font-variant-numeric:tabular-nums}.hud-chip.net{color:#7cf07c;padding:8px 10px;font-size:11px;font-weight:700}.hud-chip.net.relay{color:#ffb057}.hud-chip.sound{padding:8px 9px;font-size:15px;line-height:1}.hud-chip.sound.off{color:#8fa2b8;border-color:#ffffff0f}.drift-btn{right:22px;bottom:calc(var(--safe-bottom) + 22px);background:radial-gradient(circle at 35% 30%, #ffe27a, var(--accent));width:88px;height:88px;color:var(--accent-ink);pointer-events:auto;touch-action:none;border:3px solid #00000040;border-radius:50%;font-size:17px;font-weight:900;position:absolute;box-shadow:0 8px #00000047}.drift-btn:active{transform:translateY(4px);box-shadow:0 4px #00000047}.diag-panel{left:12px;bottom:calc(var(--safe-bottom) + 12px);pointer-events:auto;background:#04080ed9;border:1px solid #ffffff1f;border-radius:12px;flex-direction:column;gap:6px;max-width:68vw;padding:10px 12px;display:flex;position:absolute}.diag-text{color:#9fb3c8;white-space:pre-wrap;word-break:break-all;margin:0;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:10.5px;line-height:1.5}.steer-row.compact{color:#9fb3c8;gap:8px;font-size:11px}.diag{left:12px;bottom:calc(var(--safe-bottom) + 12px);color:#9fb3c8;white-space:pre-wrap;word-break:break-all;pointer-events:none;background:#04080ed1;border:1px solid #ffffff1f;border-radius:12px;max-width:62vw;margin:0;padding:10px 12px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:10.5px;line-height:1.5;position:absolute}.rotate{color:var(--accent);pointer-events:none;background:#060a12eb;justify-content:center;align-items:center;font-size:18px;font-weight:700;display:none;position:absolute;inset:0}@media (orientation:portrait){.rotate{display:flex}}.steer-box{text-align:left;background:#ffffff0d;border:1px solid #ffffff14;border-radius:16px;flex-direction:column;gap:8px;padding:12px;display:flex}.steer-head{color:#9fb3c8;justify-content:space-between;align-items:center;font-size:12px;display:flex}.steer-head b{color:#7d90a6;font-size:11px;font-weight:700}.steer-head b.ok{color:#7cf07c}.steer-head b.warn{color:#ffb057}.wheel-wrap{align-items:center;gap:12px;display:flex}.wheel{background:radial-gradient(circle,#ffffff14,#0000 70%);border:3px solid #ffffff2e;border-radius:50%;flex:none;width:72px;height:72px;transition:transform 50ms linear;position:relative}.wheel i{background:var(--accent);border-radius:2px;width:3px;height:16px;margin-left:-1.5px;position:absolute;top:5px;left:50%}.wheel u{background:#ffffff73;border-radius:50%;width:10px;height:10px;margin:-5px 0 0 -5px;position:absolute;top:50%;left:50%}.wheel-tip{color:#7d90a6;font-size:11px;line-height:1.55}.steer-row{color:#9fb3c8;align-items:center;gap:10px;font-size:12px;display:flex}.steer-row input[type=range]{flex:1;min-width:0}.steer-row b{color:#eaf2ff;text-align:right;width:36px;font-size:11px}.steer-row.check{justify-content:space-between}.steer-meter{left:50%;bottom:calc(var(--safe-bottom) + 30px);opacity:.75;pointer-events:none;background:#080d168c;border:1px solid #ffffff1f;border-radius:6px;width:30vw;max-width:190px;height:6px;position:absolute;transform:translate(-50%)}.steer-center{background:#ffffff38;width:1px;position:absolute;top:0;bottom:0;left:50%}.steer-dot{background:#ffffff8c;border-radius:50%;width:12px;height:12px;margin:-6px 0 0 -6px;transition:left 50ms linear,background .15s;position:absolute;top:50%;left:50%}.steer-meter.active .steer-dot{background:var(--accent)}.hud-chip.recenter{left:12px;bottom:calc(var(--safe-bottom) + 16px);padding:9px 12px;font-size:12px;font-weight:700;position:absolute}.hud-chip.recenter.need-gyro{color:var(--accent-ink);background:#ffd23ff0;border-color:#00000047;animation:1.8s ease-in-out infinite gyro-pulse}@keyframes gyro-pulse{50%{filter:brightness(1.12)}}.toast{left:50%;top:calc(var(--safe-top) + 64px);color:#ffe27a;white-space:nowrap;pointer-events:none;background:#080d16db;border:1px solid #ffffff24;border-radius:14px;padding:10px 16px;font-size:13px;font-weight:700;position:absolute;transform:translate(-50%)}.err-banner{left:50%;top:calc(var(--safe-top) + 8px);z-index:60;color:#ffe6e6;word-break:break-all;background:#781218f0;border:2px solid #ff787899;border-radius:12px;max-width:92vw;padding:8px 12px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;line-height:1.4;position:fixed;transform:translate(-50%);box-shadow:0 10px 30px #00000080}