:root {
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --text-color: #e0e0e0;
    --accent-color: #bb86fc;
    --accent-shadow: rgba(187, 134, 252, 0.15);
    --secondary-text: #b0b0b0;
}

* {
    box-sizing: border-box;
}

body {
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 40px 24px;
    line-height: 1.6;
}

body[data-page="index"] {
    --accent-color: #bb86fc;
    --accent-shadow: rgba(187, 134, 252, 0.15);
}

body[data-page="arc"] {
    --accent-color: #67d4ff;
    --accent-shadow: rgba(103, 212, 255, 0.18);
}

body[data-page="veil"] {
    --accent-color: #f3b35d;
    --accent-shadow: rgba(243, 179, 93, 0.18);
}

body[data-page="drift"] {
    --accent-color: #5fe0a9;
    --accent-shadow: rgba(95, 224, 169, 0.18);
}

body[data-page="hollow"] {
    --accent-color: #ff7caa;
    --accent-shadow: rgba(255, 124, 170, 0.18);
}

.site-shell {
    max-width: 1200px;
    margin: 0 auto;
}

.nav-card,
.card a {
    text-decoration: none;
}

.hero {
    text-align: center;
    max-width: 760px;
    margin: 0 auto 40px;
}

.site-title {
    margin: 0 0 12px;
    font-size: clamp(2.6rem, 8vw, 4rem);
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 0.22em;
}

.site-intro {
    margin: 0 auto;
    color: var(--secondary-text);
    max-width: 620px;
}

.grid,
.nav-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 24px;
}

.card,
.nav-card {
    background-color: var(--card-bg);
    border-radius: 14px;
    padding: 24px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    border: 1px solid transparent;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
    --card-hover-color: var(--accent-color);
    --card-shadow-color: var(--accent-shadow);
    position: relative;
    overflow: hidden;
}

.card {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.card:hover,
.nav-card:hover {
    transform: translateY(-4px);
    border-color: var(--card-hover-color);
    box-shadow: 0 10px 20px var(--card-shadow-color);
}

.card-icon {
    position: absolute;
    top: 24px;
    right: 24px;
    font-size: 2rem;
    color: var(--secondary-text);
    opacity: 0.5;
    transition: opacity 0.25s ease, color 0.25s ease;
}

.card:hover .card-icon {
    opacity: 1;
    color: var(--card-hover-color);
}

.card h2,
.nav-card h2 {
    margin: 0 40px 12px 0;
    color: var(--accent-color);
    font-size: 1.4rem;
    border-bottom: 1px solid #333;
    padding-bottom: 10px;
    transition: color 0.25s ease;
}

.card:hover h2,
.nav-card:hover h2 {
    color: var(--card-hover-color);
}

.card p,
.nav-card p {
    color: var(--secondary-text);
    margin: 0;
}

.card p {
    flex: 1;
}

.card a {
    display: inline-block;
    margin-top: auto;
    color: #121212;
    background-color: var(--accent-color);
    padding: 10px 18px;
    border-radius: 999px;
    text-align: center;
    font-weight: bold;
    align-self: flex-start;
    transition: background-color 0.2s ease, filter 0.2s ease;
}

.card a:hover {
    background-color: var(--card-hover-color);
    filter: brightness(1.08);
}

.nav-card {
    display: block;
    color: inherit;
}

.nav-card .nav-meta {
    margin-top: 18px;
    color: var(--secondary-text);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

footer {
    text-align: center;
    margin-top: 60px;
    color: #666;
    font-size: 0.9rem;
}