:root{--bg-primary:#181c17;--bg-panel:#29342d;--bg-overlay:#191814d1;--text-primary:#f8f1dc;--text-accent:#ffd98d;--gold:#f5c451;--gold-light:#ffe08a;--border-gold:#ffefc061;--shield-color:#75d2e8;--magnet-color:#b46ef5;--easy:#4ade80;--medium:#facc15;--hard:#f87171}*{box-sizing:border-box;margin:0;padding:0}html,body,#app{background:var(--bg-primary);width:100%;height:100%;color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;touch-action:none;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans SC,sans-serif;overflow:hidden}.game-shell{background:radial-gradient(circle at 18% 12%,#eda8583d,#0000 28rem),linear-gradient(135deg,#243d43,#20281d 52%,#523b28);justify-content:center;align-items:center;width:100%;height:100%;padding:clamp(10px,2vw,24px);display:flex}.game-stage{background:#29342d;border:2px solid #ffefc061;border-radius:12px;width:100%;max-width:560px;height:100%;max-height:900px;position:relative;overflow:hidden;box-shadow:0 28px 70px #0000005c}.road-canvas{touch-action:none;width:100%;height:100%;display:block}.ingame-hud{pointer-events:none;z-index:10;justify-content:space-between;align-items:flex-start;padding:12px 16px;display:flex;position:absolute;top:0;left:0;right:0}.hud-item{-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);background:#00000073;border-radius:8px;flex-direction:column;align-items:center;gap:2px;min-width:56px;padding:6px 10px;display:flex}.hud-item svg{color:var(--gold);width:16px;height:16px}.hud-label{color:#f8f1dcb3;text-transform:uppercase;letter-spacing:.06em;font-size:.65rem}.hud-value{color:var(--text-primary);font-size:.95rem;font-weight:700}.hud-shield.active svg{color:var(--shield-color)}.hud-magnet.active svg{color:var(--magnet-color)}.hud-difficulty{text-shadow:0 2px 12px #000000b3;pointer-events:none;opacity:0;z-index:15;font-size:2.2rem;font-weight:800;transition:opacity .3s;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.hud-difficulty.show{opacity:1;animation:1.5s ease-out forwards diffPulse}@keyframes diffPulse{0%{opacity:0;transform:translate(-50%,-50%)scale(.6)}20%{opacity:1;transform:translate(-50%,-50%)scale(1.1)}80%{opacity:1;transform:translate(-50%,-50%)scale(1)}to{opacity:0;transform:translate(-50%,-50%)scale(1)}}.game-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:20;background:#1918148c;flex-direction:column;justify-content:center;align-items:center;gap:16px;display:flex;position:absolute;inset:0}.game-overlay p.eyebrow{text-transform:uppercase;letter-spacing:.14em;color:var(--text-accent);margin:0;font-size:.76rem;font-weight:700}.game-overlay h1{text-shadow:0 5px 18px #00000073;text-align:center;margin:0;font-size:clamp(2.2rem,7vw,3.6rem);line-height:.95}.primary-action{color:#1d2119;background:var(--gold);cursor:pointer;pointer-events:auto;border:1px solid #ffedbe75;border-radius:8px;align-items:center;gap:8px;min-height:46px;padding:0 22px;font-size:1rem;font-weight:800;transition:transform .16s,background .16s;display:inline-flex}.primary-action:hover{background:var(--gold-light);transform:translateY(-2px)}.secondary-action{min-height:42px;color:var(--text-primary);border:1px solid var(--border-gold);cursor:pointer;pointer-events:auto;background:#ffffff1a;border-radius:8px;align-items:center;gap:8px;padding:0 18px;font-size:.9rem;font-weight:700;transition:transform .16s,background .16s;display:inline-flex}.secondary-action:hover{background:#ffffff2e;transform:translateY(-2px)}.modal-overlay{background:var(--bg-overlay);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);z-index:30;justify-content:center;align-items:center;padding:20px;display:flex;position:absolute;inset:0}.modal-panel{border:1px solid var(--border-gold);background:linear-gradient(#2d3328,#1e211a);border-radius:12px;flex-direction:column;gap:18px;width:100%;max-width:380px;padding:clamp(20px,4vw,32px);animation:.3s ease-out modalIn;display:flex;box-shadow:0 20px 60px #00000080}@keyframes modalIn{0%{opacity:0;transform:translateY(20px)scale(.96)}to{opacity:1;transform:translateY(0)scale(1)}}.modal-panel h2{text-align:center;color:var(--text-accent);margin:0;font-size:clamp(1.4rem,4vw,1.9rem)}.modal-panel p{color:#f8f1dcd1;margin:0;font-size:.9rem;line-height:1.65}.nickname-input{width:100%;color:var(--text-primary);border:2px solid var(--border-gold);text-align:center;background:#00000059;border-radius:8px;outline:none;padding:12px 14px;font-size:1.1rem;font-weight:600;transition:border-color .2s}.nickname-input:focus{border-color:var(--gold)}.nickname-input::placeholder{color:#f8f1dc66}.nickname-error{color:var(--hard);text-align:center;min-height:1.2em;font-size:.8rem}.gameover-stats{grid-template-columns:1fr 1fr;gap:10px;display:grid}.stat-box{text-align:center;background:#ffffff0f;border:1px solid #ffefc02e;border-radius:8px;padding:12px}.stat-box .label{color:#f8f1dca6;text-transform:uppercase;letter-spacing:.06em;font-size:.75rem}.stat-box .value{color:var(--gold);font-size:1.3rem;font-weight:700}.leaderboard-panel{width:100%;max-width:440px}.leaderboard-header{justify-content:space-between;align-items:center;display:flex}.trophy-icon{color:var(--gold)}.rank-source{color:#f8f1dcb3;align-items:center;gap:6px;font-size:12px;display:inline-flex}.rank-source .dot{border-radius:50%;flex-shrink:0;width:8px;height:8px}.rank-source .dot.cloud{background:#4ade80;box-shadow:0 0 6px #4caf5080}.rank-loading{text-align:center;color:#f8f1dcb3;padding:30px 10px}.spinner{border:3px solid #f5c45133;border-top-color:var(--gold);border-radius:50%;width:28px;height:28px;margin-bottom:10px;animation:.8s linear infinite spin;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}.rank-error{text-align:center;color:var(--hard);padding:20px}.empty-text{text-align:center;color:#f8f1dc99;padding:20px}.saved-badge{color:#4ade80;background:#4ade8026;border-radius:20px;align-items:center;gap:4px;padding:6px 12px;font-size:12px;font-weight:600;display:inline-flex}.leaderboard-list{flex-direction:column;gap:6px;max-height:58vh;display:flex;overflow-y:auto}.leaderboard-item{background:#ffffff0d;border-radius:8px;align-items:center;gap:10px;padding:8px 12px;transition:background .2s;display:flex}.leaderboard-item:hover{background:#ffffff1a}.leaderboard-item.rank-gold{background:#ffd7001a;border:1px solid #ffd70040}.leaderboard-item.rank-silver{background:#c0c0c01a;border:1px solid #c0c0c040}.leaderboard-item.rank-bronze{background:#cd7f321a;border:1px solid #cd7f3240}.leaderboard-rank{color:var(--text-accent);align-items:center;gap:4px;min-width:40px;font-size:14px;font-weight:800;display:flex}.rank-icon{flex-shrink:0}.rank-icon.gold{color:gold}.rank-icon.silver{color:silver}.rank-icon.bronze{color:#cd7f32}.rank-icon.normal{color:#f8f1dc80}.leaderboard-name{white-space:nowrap;text-overflow:ellipsis;flex:1;font-size:14px;font-weight:600;overflow:hidden}.leaderboard-score{color:var(--gold);text-align:right;font-size:15px;font-weight:800}.share-card{border:2px solid var(--gold);text-align:center;background:linear-gradient(135deg,#243d43,#20281d 52%,#523b28);border-radius:12px;padding:24px}.share-card h3{color:var(--text-accent);margin-bottom:8px;font-size:1.2rem}.share-card .share-score{color:var(--gold);font-size:2.5rem;font-weight:800}.player-badge{border:2px solid var(--border-gold);color:var(--text-primary);background:linear-gradient(135deg,#ffffff1a,#fff8dc14);border-radius:30px;align-items:center;gap:8px;padding:8px 18px;font-size:14px;font-weight:600;display:inline-flex}.player-avatar{background:linear-gradient(135deg, var(--gold), var(--gold-light));color:#1d2119;border-radius:50%;justify-content:center;align-items:center;width:32px;height:32px;font-size:16px;font-weight:700;display:flex;box-shadow:0 2px 6px #0000004d}.welcome-panel{border:2px solid var(--border-gold);background:linear-gradient(#2d3328,#1e211a);border-radius:16px;width:100%;max-width:400px;padding:clamp(24px,5vw,36px);animation:.5s cubic-bezier(.34,1.56,.64,1) welcomeIn}@keyframes welcomeIn{0%{opacity:0;transform:translateY(30px)scale(.9)}to{opacity:1;transform:translateY(0)scale(1)}}.welcome-hero{justify-content:center;margin-bottom:16px;display:flex}.hero-icon{color:var(--gold);filter:drop-shadow(0 4px 12px #f5c4514d);animation:2s ease-in-out infinite heroFloat}@keyframes heroFloat{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}.welcome-title{color:var(--text-accent);text-align:center;margin-bottom:4px;font-size:clamp(1.6rem,5vw,2rem);font-weight:800}.welcome-subtitle{color:#f8f1dcb3;text-align:center;margin-bottom:24px;font-size:.9rem}.nickname-section{margin-bottom:16px}.nickname-section label{color:var(--text-accent);text-align:left;margin-bottom:8px;padding-left:4px;font-size:14px;font-weight:700;display:block}.nickname-wrap{position:relative}.nickname-wrap input{border:2px solid var(--border-gold);text-align:center;width:100%;color:var(--text-primary);letter-spacing:1px;background:#00000059;border-radius:12px;outline:none;padding:14px 18px;font-family:inherit;font-size:18px;transition:all .25s}.nickname-wrap input:focus{border-color:var(--gold);background:#00000073;box-shadow:0 0 0 4px #f5c45126,0 0 20px #f5c4511a}.nickname-wrap input::placeholder{color:#f8f1dc66;font-size:15px}.nickname-hint{text-align:left;color:#f8f1dc99;padding:6px 4px 0;font-size:12px}.nickname-hint .error-text{color:var(--hard);align-items:center;gap:4px;display:flex}.bind-notice{color:#f8f1dcb3;background:#f5c45114;border:1px solid #f5c45133;border-radius:8px;align-items:center;gap:6px;margin-bottom:8px;padding:10px 12px;font-size:12px;display:flex}.button-group{flex-wrap:wrap;justify-content:center;gap:10px;display:flex}.leaderboard-list::-webkit-scrollbar{width:4px}.leaderboard-list::-webkit-scrollbar-thumb{background:#f5c45166;border-radius:4px}@media (width<=520px){.game-shell{padding:0}.game-stage{border:none;border-radius:0;max-width:100%;max-height:100%}.hud-item{min-width:48px;padding:5px 8px}.hud-value{font-size:.85rem}.modal-panel{max-width:92vw;padding:20px}.welcome-panel{max-width:92vw;padding:24px 20px}.welcome-title{font-size:1.5rem}.nickname-wrap input{padding:12px 14px;font-size:16px}.leaderboard-list{max-height:50vh}}@media (height<=700px){.leaderboard-list{max-height:220px}}