:root {
    --bg-gradient-start: #0f0c29;
    --bg-gradient-mid: #302b63;
    --bg-gradient-end: #24243e;
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --accent-purple: #a855f7;
    --accent-blue: #3b82f6;
    --accent-green: #22c55e;
    --accent-orange: #f97316;
    --accent-red: #ef4444;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-mid) 50%, var(--bg-gradient-end) 100%);
    min-height: 100vh;
    color: var(--text-primary);
    overflow-x: hidden;
}

/* Animated background */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: -1;
}

.bg-animation .circle {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(168, 85, 247, 0.15) 0%, transparent 70%);
    animation: float 20s infinite ease-in-out;
}

.bg-animation .circle:nth-child(1) {
    width: 600px;
    height: 600px;
    top: -200px;
    left: -200px;
    animation-delay: 0s;
}

.bg-animation .circle:nth-child(2) {
    width: 400px;
    height: 400px;
    top: 50%;
    right: -100px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
    animation-delay: -5s;
}

.bg-animation .circle:nth-child(3) {
    width: 500px;
    height: 500px;
    bottom: -150px;
    left: 30%;
    background: radial-gradient(circle, rgba(34, 197, 94, 0.1) 0%, transparent 70%);
    animation-delay: -10s;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    25% {
        transform: translate(30px, -30px) scale(1.05);
    }

    50% {
        transform: translate(-20px, 20px) scale(0.95);
    }

    75% {
        transform: translate(20px, 10px) scale(1.02);
    }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 60px;
    padding-top: 40px;
}

.logo {
    font-size: 64px;
    margin-bottom: 20px;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

h1 {
    font-size: clamp(32px, 6vw, 56px);
    font-weight: 800;
    background: linear-gradient(135deg, #fff 0%, #a855f7 50%, #3b82f6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    font-weight: 400;
    max-width: 500px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Games Grid */
.games-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
    margin-bottom: 60px;
}

/* Game Card */
.game-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 32px;
    text-decoration: none;
    color: inherit;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.game-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--card-accent), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.game-card:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: var(--card-accent);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3),
        0 0 60px var(--card-glow);
}

.game-card:hover::before {
    opacity: 1;
}

.game-card:hover .game-icon {
    transform: scale(1.1) rotate(5deg);
}

.game-card:hover .play-btn {
    transform: translateX(5px);
}

/* Card accent colors */
.game-card.sudoku {
    --card-accent: var(--accent-purple);
    --card-glow: rgba(168, 85, 247, 0.2);
}

.game-card.minesweeper {
    --card-accent: var(--accent-red);
    --card-glow: rgba(239, 68, 68, 0.2);
}

.game-card.game-2048 {
    --card-accent: var(--accent-orange);
    --card-glow: rgba(249, 115, 22, 0.2);
}

.game-card.setgame {
    --card-accent: var(--accent-green);
    --card-glow: rgba(34, 197, 94, 0.2);
}

.game-card.tripletriad {
    --card-accent: var(--accent-blue);
    --card-glow: rgba(59, 130, 246, 0.2);
}

.game-card.simonsays {
    --card-accent: #10b981;
    --card-glow: rgba(16, 185, 129, 0.2);
}

.game-card.mastermind {
    --card-accent: #8b5cf6;
    --card-glow: rgba(139, 92, 246, 0.2);
}

.game-card.wordle {
    --card-accent: #84cc16;
    --card-glow: rgba(132, 204, 22, 0.2);
}

.game-card.parolecrociate {
    --card-accent: #06b6d4;
    --card-glow: rgba(6, 182, 212, 0.2);
}

.game-header {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 20px;
}

.game-icon {
    font-size: 56px;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    flex-shrink: 0;
}

.game-info {
    flex: 1;
}

.game-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.game-description {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.game-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.tag {
    background: rgba(255, 255, 255, 0.1);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
}

.game-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.difficulty {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-secondary);
}

.difficulty-dots {
    display: flex;
    gap: 4px;
}

.difficulty-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
}

.difficulty-dot.active {
    background: var(--card-accent);
}

.play-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--card-accent);
    padding: 10px 20px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 14px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.play-btn:hover {
    box-shadow: 0 4px 20px var(--card-glow);
}

/* Footer */
footer {
    text-align: center;
    padding: 40px 20px;
    border-top: 1px solid var(--card-border);
    margin-top: 40px;
}

.footer-text {
    color: var(--text-secondary);
    font-size: 14px;
}

.footer-text a {
    color: var(--accent-purple);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.footer-text a:hover {
    color: var(--accent-blue);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-top: 20px;
}

.social-link {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    font-size: 20px;
    text-decoration: none;
    transition: all 0.3s;
}

.social-link:hover {
    background: var(--accent-purple);
    border-color: var(--accent-purple);
    transform: translateY(-3px);
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 20px 16px;
    }

    header {
        margin-bottom: 40px;
        padding-top: 20px;
    }

    .logo {
        font-size: 48px;
    }

    .games-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .game-card {
        padding: 24px;
    }

    .game-icon {
        font-size: 48px;
    }

    .game-title {
        font-size: 20px;
    }
}

/* PWA Install prompt styles */
.pwa-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: linear-gradient(135deg, var(--accent-green), #16a34a);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    color: white;
    margin-left: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}