/* 1. Global Settings & Color Palette */
:root {
    --background-color: #f5f5f7;
    --text-primary-dark: #1d1d1f;
    --text-secondary-dark: #6e6e73;
    --text-light: #ffffff;
    --text-light-secondary: rgba(255, 255, 255, 0.7);
    --button-background: rgba(255, 255, 255, 0.15);
    --button-background-hover: rgba(255, 255, 255, 0.25);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    background-color: var(--background-color);
    color: var(--text-primary-dark);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 2. Header */
.site-header {
    text-align: center;
    padding: 4rem 1.5rem 2rem 1.5rem;
}

.site-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.02em;
}

.site-tagline {
    font-size: 1.25rem;
    color: var(--text-secondary-dark);
    margin-top: 0.5rem;
}

/* 3. Main Content */
.site-main {
    max-width: 1100px;
    margin: 0 auto;
    padding: 1rem;
}

/* 4. Game Showcase Grid */
.game-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.game-card {
    border-radius: 24px;
    display: flex;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.3s ease;
    min-height: 400px; /* 給予卡片一個最小高度 */
}

.game-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 30px rgba(0, 0, 0, 0.15);
}

.card-content {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    color: var(--text-light); /* 卡片內文字改為白色 */
}

.game-category {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-light);
    opacity: 0.8;
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card-title {
    font-size: 2rem;
    font-weight: 700;
    margin: 0 0 0.75rem 0;
    line-height: 1.2;
}

.card-description {
    font-size: 1rem;
    color: var(--text-light-secondary);
    line-height: 1.6;
    margin: 0;
    flex-grow: 1;
}

.play-button {
    display: inline-block;
    background-color: var(--button-background);
    color: var(--text-light);
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    padding: 0.75rem 1.5rem;
    border-radius: 980px;
    margin-top: 2rem;
    align-self: flex-start;
    transition: background-color 0.2s;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.play-button:hover {
    background-color: var(--button-background-hover);
}

/* 5. Gradient Backgrounds for Cards */
.card-blue {
    background-image: linear-gradient(45deg, #007aff 0%, #5856d6 100%);
}
.card-orange {
    background-image: linear-gradient(45deg, #ff9500 0%, #ff3b30 100%);
}
.card-purple {
    background-image: linear-gradient(45deg, #af52de 0%, #5856d6 100%);
}
.card-teal {
    background-image: linear-gradient(45deg, #30d158 0%, #007aff 100%);
}
.card-indigo {
    background-image: linear-gradient(45deg, #5856d6 0%, #af52de 100%);
}


/* 6. Footer */
.site-footer {
    text-align: center;
    padding: 4rem 1.5rem;
    color: var(--text-secondary-dark);
    font-size: 0.8rem;
}