* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --ready-bg: #0D1F0D;
    --waiting-bg: #B91C1C;
    --go-bg: #22C55E;
    --early-bg: #F97316;
    --result-bg: #0D1F0D;
    --text-light: #ffffff;
    --text-muted: rgba(255, 255, 255, 0.75);
    --accent: #22C55E;
}

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

#app {
    height: 100%;
    width: 100%;
    position: relative;
}

.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.content {
    text-align: center;
    padding: 2rem;
    max-width: 500px;
    width: 100%;
}

/* Ready Screen */
.ready-screen {
    background: var(--ready-bg);
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
}

.state-ready .ready-screen {
    opacity: 1;
    pointer-events: auto;
}

.ready-screen h1 {
    font-size: 3.5rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
    font-weight: 800;
    letter-spacing: -1px;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.instructions {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.instructions p {
    color: var(--text-light);
    font-size: 1.1rem;
    line-height: 1.6;
}

.green-text {
    color: #2ecc71;
    font-weight: 700;
}

.btn-start {
    background: linear-gradient(135deg, #6c5ce7 0%, #a55eea 100%);
    color: white;
    border: none;
    padding: 1rem 3rem;
    font-size: 1.2rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 15px rgba(108, 92, 231, 0.4);
}

.btn-start:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(108, 92, 231, 0.5);
}

.btn-start:active {
    transform: translateY(0);
}

.best-score {
    margin-top: 2rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.best-score strong {
    color: #f1c40f;
}

/* Waiting Screen */
.waiting-screen {
    background: var(--waiting-bg);
    cursor: pointer;
}

.state-waiting .waiting-screen {
    opacity: 1;
    pointer-events: auto;
}

.waiting-screen h2 {
    color: white;
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.waiting-screen .tip {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.1rem;
}

.pulse-ring {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    border: 4px solid rgba(255, 255, 255, 0.3);
    margin: 0 auto 2rem;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.7;
    }
}

/* Go Screen */
.go-screen {
    background: var(--go-bg);
    cursor: pointer;
}

.state-go .go-screen {
    opacity: 1;
    pointer-events: auto;
}

.go-text {
    font-size: 5rem;
    color: white;
    font-weight: 900;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    animation: popIn 0.2s ease-out;
}

@keyframes popIn {
    0% {
        transform: scale(0.5);
        opacity: 0;
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Early Screen */
.early-screen {
    background: var(--early-bg);
}

.state-early .early-screen {
    opacity: 1;
    pointer-events: auto;
}

.early-screen h1 {
    font-size: 2.5rem;
    color: white;
    margin-bottom: 1rem;
}

.early-screen p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

/* Result Screen */
.result-screen {
    background: var(--result-bg);
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
}

.state-result .result-screen {
    opacity: 1;
    pointer-events: auto;
}

.result-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 24px;
    padding: 2rem;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.result-time {
    margin-bottom: 1rem;
}

.result-time span:first-child {
    font-size: 4rem;
    font-weight: 800;
    color: white;
    letter-spacing: -2px;
}

.result-time .unit {
    font-size: 1.5rem;
    color: var(--text-muted);
    margin-left: 0.25rem;
}

.result-rating {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.result-comparison {
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

.result-bar-container {
    margin-top: 1.5rem;
}

.result-bar {
    height: 12px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    position: relative;
    overflow: visible;
}

.bar-fill {
    height: 100%;
    border-radius: 6px;
    background: linear-gradient(90deg, #e74c3c 0%, #f39c12 30%, #2ecc71 70%, #00d4aa 100%);
    transition: width 0.5s ease-out;
}

.bar-marker {
    position: absolute;
    top: -6px;
    width: 24px;
    height: 24px;
    background: white;
    border-radius: 50%;
    transform: translateX(-50%);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    transition: left 0.5s ease-out;
}

.bar-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.result-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
}

.btn-retry, .btn-share {
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    border: none;
}

.btn-retry {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-retry:hover {
    background: rgba(255, 255, 255, 0.15);
}

.btn-share {
    background: linear-gradient(135deg, #6c5ce7 0%, #a55eea 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(108, 92, 231, 0.4);
}

.btn-share:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(108, 92, 231, 0.5);
}

.stats {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.25rem;
}

.stat-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: white;
}

/* Mobile optimizations */
@media (max-width: 480px) {
    .ready-screen h1 {
        font-size: 2.5rem;
    }
    
    .go-text {
        font-size: 4rem;
    }
    
    .result-time span:first-child {
        font-size: 3rem;
    }
    
    .result-actions {
        flex-direction: column;
    }
    
    .stats {
        gap: 1rem;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --ready-bg: #0f0f1a;
    }
}

/* Animation for result appearance */
.result-card {
    animation: slideUp 0.4s ease-out;
}

@keyframes slideUp {
    0% {
        transform: translateY(20px);
        opacity: 0;
    }
    100% {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Celebration particles (added via JS) */
.particle {
    position: fixed;
    pointer-events: none;
    font-size: 1.5rem;
    animation: particleFall 1s ease-out forwards;
}

@keyframes particleFall {
    0% {
        transform: translateY(0) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translateY(100px) rotate(360deg);
        opacity: 0;
    }
}