:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #38bdf8;
    --accent-glow: rgba(56, 189, 248, 0.5);
    --grid-gap: 2rem;
    --transition-speed: 0.3s;
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    background-image:
        radial-gradient(at 0% 0%, rgba(56, 189, 248, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(139, 92, 246, 0.15) 0px, transparent 50%);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 4rem;
    animation: fadeInDown 0.8s ease-out;
}

h1 {
    font-size: 3.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, #38bdf8 0%, #818cf8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1rem;
    letter-spacing: -0.05em;
    text-shadow: 0 10px 30px rgba(56, 189, 248, 0.3);
}

p.subtitle {
    color: var(--text-secondary);
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

main {
    width: 100%;
    max-width: 1200px;
}

.games-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--grid-gap);
    padding: 1rem;
}

.game-card {
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    overflow: hidden;
    backdrop-filter: blur(12px);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed), border-color var(--transition-speed);
    text-decoration: none;
    color: inherit;
    position: relative;
    display: flex;
    flex-direction: column;
    height: 320px;
    cursor: pointer;
    animation: fadeInUp 0.6s ease-out backwards;
}

/* Stagger animation delay */
.game-card.coming-soon {
    display: none;
}

.game-card:nth-child(1) {
    animation-delay: 0.1s;
}

.game-card:nth-child(2) {
    animation-delay: 0.2s;
}

.game-card:nth-child(3) {
    animation-delay: 0.3s;
}

.game-card:nth-child(4) {
    animation-delay: 0.4s;
}

.game-card:nth-child(5) {
    animation-delay: 0.5s;
}

.game-card:nth-child(6) {
    animation-delay: 0.6s;
}

.game-card:nth-child(7) {
    animation-delay: 0.7s;
}

.game-card:nth-child(8) {
    animation-delay: 0.8s;
}

.game-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    border-color: rgba(255, 255, 255, 0.2);
}

.card-image {
    height: 180px;
    background-color: #1e293b;
    background-size: cover;
    background-position: center;
    position: relative;
    overflow: hidden;
}

/* Placeholder gradients per game */
.card-image.puzzle-bg {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.card-image.num-2048-bg {
    background: linear-gradient(135deg, #edc22e, #f2b179);
}

.card-image.dashboard-bg {
    background: linear-gradient(135deg, #0ea5e9, #6366f1);
}

.card-image.acquire-bg {
    background: linear-gradient(135deg, #10b981, #059669);
}

.card-image.mastermind-bg {
    background: linear-gradient(135deg, #ef4444, #b91c1c);
}

.card-image.queens-bg {
    background: linear-gradient(135deg, #8b5cf6, #6d28d9);
}

.card-image.poisson-bg {
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
}

.card-image.wordle-bg {
    background: linear-gradient(135deg, #6aaa64, #538d4e);
}

.card-image.risk-bg {
    background: linear-gradient(135deg, #dc2626, #991b1b);
}

.card-image.bank-bg {
    background: linear-gradient(135deg, #059669, #047857);
}

.card-image.coming-soon-bg {
    background: linear-gradient(135deg, #334155, #475569);
}

.card-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, transparent 0%, rgba(15, 23, 42, 0.8) 100%);
    opacity: 0.6;
    transition: opacity var(--transition-speed);
}

.game-card:hover .card-image::after {
    opacity: 0.3;
}

.card-content {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.card-status {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
    margin-bottom: 0.5rem;
    display: inline-block;
}

.status-playable {
    color: #4ade80;
}

.status-soon {
    color: var(--text-secondary);
}

.game-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 3rem;
    opacity: 0.8;
    z-index: 10;
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.game-card:hover .game-icon {
    transform: translate(-50%, -50%) scale(1.2);
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1rem 2rem;
    border-radius: 50px;
    color: white;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    .games-grid {
        grid-template-columns: repeat(auto-fill, minmax(100%, 1fr));
    }
}