:root {
    --bg-color: #f4f7f9;
    --text-color: #333;
    --card-bg-color: #ffffff;
    --card-shadow: 0 10px 20px rgba(0,0,0,0.1);
    --card-hover-shadow: 0 15px 30px rgba(0,0,0,0.15);
    --header-color: #2c3e50;
    --button-bg: #3498db;
    --button-text: #ffffff;
}

[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --text-color: #f0f0f0;
    --card-bg-color: #2c2c2c;
    --card-shadow: 0 10px 20px rgba(0,0,0,0.3);
    --card-hover-shadow: 0 15px 30px rgba(0,0,0,0.4);
    --header-color: #e0e0e0;
    --button-bg: #5e35b1;
    --button-text: #ffffff;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 2rem;
    transition: background-color 0.3s, color 0.3s;
    line-height: 1.6;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    animation: fadeInDown 0.5s ease-out;
}

header h1 {
    color: var(--header-color);
    font-size: 2.5rem;
    margin: 0;
}

.theme-switch-wrapper {
    display: flex;
    align-items: center;
}

.theme-switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.theme-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--button-bg);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.slider .icon-wrapper {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 6px;
    box-sizing: border-box;
}

.slider .sun, .slider .moon {
    font-size: 18px;
    transition: opacity 0.4s;
}

/* Hide moon in light mode */
input:not(:checked) + .slider .moon {
    opacity: 0;
}

/* Hide sun in dark mode */
input:checked + .slider .sun {
    opacity: 0;
}


#game-catalog {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.game-card {
    background-color: var(--card-bg-color);
    border-radius: 15px;
    box-shadow: var(--card-shadow);
    overflow: hidden;
    text-decoration: none;
    color: var(--text-color);
    transition: transform 0.3s, box-shadow 0.3s;
    animation: fadeInUp 0.5s ease-out forwards;
    opacity: 0;
}

.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:hover {
    transform: translateY(-10px);
    box-shadow: var(--card-hover-shadow);
}

.game-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    display: block;
}

.game-card h3 {
    margin: 1.2rem 1.5rem 0.5rem;
    font-size: 1.5rem;
}

.game-card p {
    margin: 0 1.5rem 1.5rem;
    font-size: 1rem;
    opacity: 0.8;
}

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.ai-notice {
    background-color: var(--card-bg-color);
    color: var(--text-color);
    padding: 1rem;
    margin-bottom: 2rem;
    border-radius: 10px;
    text-align: center;
    font-size: 1.1rem;
    box-shadow: var(--card-shadow);
    animation: fadeInDown 0.5s ease-out;
}