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

:root {
    --bg-dark: #0a0e1a;
    --bg-card: #1a1f35;
    --primary: #3b82f6;
    --primary-light: #60a5fa;
    --accent: #8b5cf6;
    --success: #10b981;
    --danger: #ef4444;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --border: rgba(148, 163, 184, 0.1);
    --shadow: rgba(0, 0, 0, 0.3);
}

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.5;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(59, 130, 246, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(139, 92, 246, 0.05) 0%, transparent 50%);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px;
}

/* Páginas */
.page {
    display: none;
    animation: fadeIn 0.5s ease;
}

.page.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Home Page */
.header {
    text-align: center;
    padding: 25px 20px 18px;
    background: var(--bg-card);
    border-radius: 12px;
    margin-bottom: 20px;
    border: 1px solid var(--border);
}

.neon-title {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: 2px;
    margin: 0;
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.highlight {
    background: linear-gradient(135deg, var(--accent), var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-top: 8px;
    font-weight: 400;
}

/* Stats Grid - Dentro do Header */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-top: 18px;
}

.stat-card {
    background: var(--bg-dark);
    border-radius: 8px;
    padding: 14px 10px;
    text-align: center;
    border: 1px solid var(--border);
    transition: all 0.2s ease;
}

.stat-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-light);
}

.stat-label {
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Menu */
.menu {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 15px;
    margin: 0 0 15px 0;
}

.menu-btn {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px 20px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 10px;
    position: relative;
}

.menu-btn:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--shadow);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(59, 130, 246, 0.05) 100%);
}

.menu-btn .icon {
    font-size: 2rem;
    opacity: 0.9;
}

.menu-btn .text {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.menu-btn .desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* Page Header */
.page-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.back-btn {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.back-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    transform: translateX(-3px);
}

.page-title {
    font-size: 1.75rem;
    font-weight: 600;
}

/* Training Page */
.training-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.training-controls {
    background: var(--bg-card);
    border-radius: 10px;
    padding: 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
    border: 1px solid var(--border);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.control-group label {
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
}

.control-group input,
.control-group select {
    background: var(--bg-dark);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.9rem;
}

.action-btn {
    background: var(--primary);
    border: none;
    color: var(--text-primary);
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px var(--shadow);
}

.action-btn:hover {
    background: var(--primary-light);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow);
}

.action-btn.secondary {
    background: var(--danger);
}

.action-btn.secondary:hover {
    background: #dc2626;
}

/* Progress Section */
.progress-section {
    background: var(--bg-card);
    border-radius: 10px;
    padding: 18px;
    border: 1px solid var(--border);
}

.progress-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
    font-size: 0.9rem;
    font-weight: 500;
}

.progress-bar {
    background: var(--bg-dark);
    border-radius: 20px;
    height: 20px;
    overflow: hidden;
    position: relative;
    border: 1px solid var(--border);
}

.progress-fill {
    background: linear-gradient(90deg, var(--primary), var(--accent), var(--success));
    height: 100%;
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 20px;
}

/* Canvas */
canvas {
    width: 100%;
    max-height: 300px;
    background: var(--bg-card);
    border-radius: 10px;
    border: 1px solid var(--border);
    display: block;
}

.chart-container {
    background: var(--bg-card);
    border-radius: 10px;
    padding: 15px;
    border: 1px solid var(--border);
}

/* Game Page */
.game-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
    align-items: center;
}

.game-info {
    width: 100%;
}

.score-panel {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 420px;
    margin: 0 auto;
    background: var(--bg-card);
    border-radius: 10px;
    padding: 18px 28px;
    border: 1px solid var(--border);
}

.score-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    flex: 1;
}

.score-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
}

.score-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-light);
}

.score-separator {
    font-size: 2.5rem;
    color: var(--text-secondary);
    opacity: 0.3;
    font-weight: 300;
    padding: 0 10px;
}

.game-controls {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.game-controls .action-btn {
    min-width: 200px;
}

.control-hint {
    color: var(--text-secondary);
    margin-top: 10px;
    font-size: 0.85rem;
}

/* About Page */
.about-content {
    display: flex;
    flex-direction: column;
    gap: 15px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
}

.about-section {
    background: var(--bg-card);
    border-radius: 10px;
    padding: 20px;
    border-left: 3px solid var(--primary);
    border: 1px solid var(--border);
    border-left: 3px solid var(--primary);
}

.about-section h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
    color: var(--primary-light);
    font-weight: 600;
}

.about-section p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.9rem;
}

.about-section ul {
    margin: 12px 0;
    padding-left: 24px;
}

.about-section li {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.85rem;
}

.params-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    margin-top: 12px;
}

.param-card {
    background: var(--bg-dark);
    border-radius: 8px;
    padding: 15px;
    border: 1px solid var(--border);
}

.param-name {
    font-size: 0.85rem;
    color: var(--primary-light);
    margin-bottom: 6px;
    font-weight: 600;
}

.param-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.param-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.tech-tag {
    background: var(--primary);
    padding: 6px 14px;
    border-radius: 16px;
    font-size: 0.8rem;
    font-weight: 500;
}

.github-link {
    display: inline-block;
    background: var(--bg-dark);
    padding: 10px 20px;
    border-radius: 8px;
    text-decoration: none;
    color: var(--text-primary);
    border: 1px solid var(--primary);
    margin-top: 12px;
    transition: all 0.2s ease;
    font-size: 0.9rem;
}

.github-link:hover {
    background: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
}

/* Fullscreen Mode */
.game-container:fullscreen {
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--bg-dark);
    padding: 20px;
}

.game-container:fullscreen canvas {
    max-width: 90vw;
    max-height: 80vh;
    width: auto;
    height: auto;
}

.game-container:fullscreen .game-info {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: auto;
}

.game-container:fullscreen .game-controls {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
}

/* Responsive */
@media (max-width: 768px) {
    .neon-title {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 0.85rem;
    }
    
    .menu {
        grid-template-columns: 1fr;
    }
    
    .training-controls {
        grid-template-columns: 1fr;
    }
    
    canvas {
        max-width: 100%;
        height: auto;
    }
    
    .score-value {
        font-size: 2rem;
    }
    
    .score-separator {
        font-size: 2rem;
    }
    
    .container {
        padding: 10px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 8px;
    }
    
    .score-panel {
        max-width: 100%;
    }
}