/* ============================================
   Mini Arcade - Estilos Globales Compartidos
   ============================================ */

/* --- Variables y Reset --- */
:root {
    --bg-dark: #111114;
    --bg-card: #1a1a1f;
    --bg-board: #1e1e24;
    --bg-cell: rgba(255, 255, 255, 0.04);
    --accent: #ff6b35;
    --accent-glow: rgba(255, 107, 53, 0.4);
    --text-primary: #fffffe;
    --text-secondary: #a7a9be;
    --text-muted: #6b6d8a;

    --transition-speed: 0.25s;
    --grid-color: rgba(255, 255, 255, 0.025);
    --grid-dot: rgba(255, 255, 255, 0.06);

    /* Glassmorphism base */
    --glass-bg: rgba(26, 26, 31, 0.35);
    --glass-blur: 24px;
    --glass-border: rgba(255, 255, 255, 0.12);
    --glass-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    --glass-inset-top: inset 0 1px 0 rgba(255, 255, 255, 0.1);
    --glass-inset-bottom: inset 0 -1px 0 rgba(0, 0, 0, 0.15);

    /* Gem colors */
    --gem-red: #ff4757;
    --gem-red-light: #ff6b81;
    --gem-blue: #3742fa;
    --gem-blue-light: #5352ed;
    --gem-green: #2ed573;
    --gem-green-light: #7bed9f;
    --gem-yellow: #ffa502;
    --gem-yellow-light: #ffbe76;
    --gem-purple: #a55eea;
    --gem-purple-light: #c56cf0;
    --gem-cyan: #00d2d3;
    --gem-cyan-light: #48dbfb;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* --- Animated Background (shared) --- */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        radial-gradient(circle, var(--grid-dot) 1px, transparent 1px);
    background-size: 32px 32px;
    z-index: 0;
    pointer-events: none;
}

body::after {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(600px circle at 15% 25%, rgba(255, 107, 53, 0.15), transparent 60%),
        radial-gradient(500px circle at 85% 15%, rgba(165, 94, 234, 0.15), transparent 60%),
        radial-gradient(400px circle at 50% 85%, rgba(55, 66, 250, 0.12), transparent 60%),
        radial-gradient(350px circle at 75% 70%, rgba(46, 213, 115, 0.10), transparent 60%),
        radial-gradient(300px circle at 25% 60%, rgba(255, 71, 87, 0.08), transparent 60%);
    z-index: 0;
    pointer-events: none;
    animation: bgShift 20s ease-in-out infinite alternate;
}

@keyframes bgShift {
    0% { opacity: 1; transform: scale(1) translate(0, 0); }
    50% { opacity: 0.85; transform: scale(1.08) translate(1%, -1%); }
    100% { opacity: 1; transform: scale(1) translate(-1%, 1%); }
}

/* --- Glassmorphism Utility Classes --- */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur)) saturate(1.5);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.5);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    box-shadow:
        var(--glass-shadow),
        var(--glass-inset-top),
        var(--glass-inset-bottom);
}

.glass-sm {
    background: rgba(26, 26, 31, 0.3);
    backdrop-filter: blur(20px) saturate(1.5);
    -webkit-backdrop-filter: blur(20px) saturate(1.5);
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    box-shadow:
        0 4px 24px rgba(0, 0, 0, 0.3),
        var(--glass-inset-top);
}

.glass-dark {
    background: rgba(10, 10, 20, 0.88);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

/* --- Buttons (shared) --- */
.btn {
    padding: 14px 48px;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    letter-spacing: 0.5px;
    min-width: 220px;
    position: relative;
    overflow: hidden;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), #e85d2c);
    color: white;
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px var(--accent-glow);
}

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

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(255, 107, 53, 0.08);
}

/* --- Screens --- */
.screen {
    display: none;
}
.screen.active {
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* --- Animations (shared) --- */
@keyframes slideInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}