*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;-webkit-font-smoothing:antialiased}
body{font-family:'Inter',-apple-system,system-ui,sans-serif;background:#0A0A1A;color:#E2E8F0;min-height:100vh;overflow:hidden}
#app{width:100vw;height:100vh;position:relative}
.screen{position:absolute;inset:0;display:none;flex-direction:column;align-items:center;justify-content:center;padding:20px}
.screen.active{display:flex}

.title{font-size:2rem;font-weight:700;text-align:center;background:linear-gradient(135deg,#10B981,#06B6D4);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:4px}
.subtitle{font-size:.85rem;color:#64748B;margin-bottom:20px}
.btn-start{padding:14px 36px;border:1px solid rgba(16,185,129,0.3);border-radius:10px;background:rgba(16,185,129,0.1);color:#34D399;font-family:inherit;font-size:1rem;font-weight:700;cursor:pointer;transition:all .25s ease;margin:4px}
.btn-start:hover{background:rgba(16,185,129,0.2);transform:translateY(-2px);box-shadow:0 4px 16px rgba(16,185,129,0.2)}
.btn-start.secondary{background:rgba(100,116,139,0.1);color:#94A3B8;border-color:rgba(100,116,139,0.2)}

.controls-help{display:flex;gap:16px;margin-top:16px;font-size:.72rem;color:#64748B;font-family:'JetBrains Mono',monospace}
.hs-mini{margin-top:16px;font-size:.72rem;color:#64748B;font-family:'JetBrains Mono',monospace}

/* HUD */
.hud{display:flex;gap:24px;padding:10px 16px;justify-content:center;align-items:center}
.hud-item{display:flex;flex-direction:column;align-items:center;gap:2px}
.hud-label{font-size:.6rem;text-transform:uppercase;color:#64748B;letter-spacing:.06em}
.hud-value{font-family:'JetBrains Mono',monospace;font-weight:700;font-size:1.1rem;color:#34D399}

/* Game Area */
.game-area{display:flex;align-items:stretch;gap:0;justify-content:center}
.method-labels{display:flex;flex-direction:column;justify-content:space-around;padding:8px 0}
.method-label{writing-mode:horizontal-tb;font-family:'JetBrains Mono',monospace;font-weight:700;font-size:.72rem;padding:8px 10px;border-radius:6px 0 0 6px;min-width:60px;text-align:center}
.method-label.get{background:rgba(16,185,129,0.15);color:#10B981;border:1px solid rgba(16,185,129,0.2)}
.method-label.post{background:rgba(59,130,246,0.15);color:#3B82F6;border:1px solid rgba(59,130,246,0.2)}
.method-label.put{background:rgba(245,158,11,0.15);color:#F59E0B;border:1px solid rgba(245,158,11,0.2)}
.method-label.delete{background:rgba(239,68,68,0.15);color:#EF4444;border:1px solid rgba(239,68,68,0.2)}

canvas{display:block;border:1px solid rgba(16,185,129,0.12);border-radius:0 10px 10px 0}

.tip-bar{font-size:.72rem;color:#94A3B8;text-align:center;margin-top:8px;min-height:18px;max-width:500px;font-family:'JetBrains Mono',monospace}

/* Mobile */
.mobile-controls,.mobile-rows{display:none;gap:8px;justify-content:center;margin-top:8px}
.mc-btn,.mc-row{padding:10px 20px;border:1px solid rgba(16,185,129,0.2);border-radius:8px;background:rgba(16,185,129,0.06);color:#E2E8F0;font-family:'JetBrains Mono',monospace;font-size:1rem;cursor:pointer}
.mc-row.get{color:#10B981}.mc-row.post{color:#3B82F6}.mc-row.put{color:#F59E0B}.mc-row.delete{color:#EF4444}

/* Game Over */
.over-title{font-size:1.8rem;color:#34D399;margin-bottom:8px}
.final-score{font-family:'JetBrains Mono',monospace;font-size:2.4rem;font-weight:700;color:#06B6D4;margin-bottom:4px}
.final-stats{font-size:.78rem;color:#64748B;margin-bottom:20px;font-family:'JetBrains Mono',monospace}
.hs-title{color:#F59E0B;font-size:.9rem;margin:20px 0 8px}
.hs-list{font-family:'JetBrains Mono',monospace;font-size:.72rem;color:#94A3B8;line-height:1.8}

/* Float */
.float-score{position:fixed;font-family:'JetBrains Mono',monospace;font-weight:700;font-size:1.1rem;pointer-events:none;z-index:100;animation:floatUp .8s ease-out forwards}
@keyframes floatUp{0%{opacity:1;transform:translateY(0)}100%{opacity:0;transform:translateY(-60px)}}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-4px)}50%{transform:translateX(4px)}75%{transform:translateX(-2px)}}
.shake{animation:shake .3s ease}

@media(max-width:640px){.mobile-controls,.mobile-rows{display:flex}.method-labels{font-size:.6rem}canvas{max-width:calc(100vw - 80px)}}