/* ============================================
   VR Sites — Design System 2026
   Clean, minimal, modern. No glow. No noise.
   ============================================ */

/* --- Tokens --- */
:root {
    --color-bg: #0a0a0a;
    --color-surface: #141414;
    --color-surface-hover: #1c1c1c;
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-hover: rgba(255, 255, 255, 0.16);
    --color-text: #e5e5e5;
    --color-text-secondary: #8a8a8a;
    --color-text-tertiary: #555;
    --color-heading: #ffffff;
    --color-accent: #0a84ff;
    --color-accent-hover: #3da5ff;
    --color-accent-subtle: rgba(10, 132, 255, 0.10);
    /* Vibrant accents — lift interactive elements off the dark canvas */
    --grad-accent: linear-gradient(135deg, #0a84ff 0%, #4db5ff 100%);
    --glow-accent: 0 4px 16px rgba(10, 132, 255, 0.38);
    --glow-accent-hover: 0 7px 26px rgba(10, 132, 255, 0.62);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.5);
    --transition: 0.2s ease;
    --max-width: 1200px;
}

/* --- Reset & Base --- */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    height: 100%;
    overflow-x: hidden;          /* moved here so sticky works on body */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    min-height: 100%;
    display: flex;
    flex-direction: column;
    margin: 0;
    padding: 0;
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
}

img {
    max-width: 100%;
    height: auto;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--color-accent-hover);
}

h1, h2, h3, h4, h5, h6 {
    color: var(--color-heading);
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.3;
    margin: 0 0 0.75rem;
}

p {
    margin: 0 0 1rem;
}

hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: 1.5rem 0;
}

/* --- Layout --- */
.site-wrapper {
    flex: 1;
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* --- Navbar --- */
.site-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.site-nav .container-fluid {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1.5rem;
}

.site-nav .nav-logo img {
    height: 32px;
    width: auto;
    display: block;
    transition: opacity var(--transition);
}

.site-nav .nav-logo img:hover {
    opacity: 0.8;
}

.site-nav .nav-title {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.site-nav .nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.site-nav .nav-links a {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition);
}

.site-nav .nav-links a:hover {
    color: var(--color-heading);
}

.site-nav .nav-links a.active {
    color: var(--color-heading);
}

/* --- Hero --- */
.site-hero {
    padding: 2.5rem 0 0.5rem;
}

.site-hero h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.375rem;
}

.site-hero p {
    color: var(--color-text-secondary);
    font-size: 1rem;
    max-width: 600px;
    margin: 0;
}

.hero-guide-link {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    margin-left: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    white-space: nowrap;
}

.hero-guide-link .bi {
    font-size: 0.8rem;
    transition: transform var(--transition);
}

.hero-guide-link:hover .bi {
    transform: translateX(2px);
}

/* --- Discovery toolbar --- */
.discovery {
    padding: 1rem 0 0.5rem;
}

.search-bar {
    position: relative;
    display: flex;
    align-items: center;
    max-width: 480px;
    margin-bottom: 1rem;
}

.search-bar .bi-search {
    position: absolute;
    left: 0.875rem;
    color: var(--color-text-tertiary);
    font-size: 0.9rem;
    pointer-events: none;
}

.search-bar input {
    width: 100%;
    padding: 0.625rem 2.25rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    transition: border-color var(--transition), background var(--transition);
}

.search-bar input::placeholder { color: var(--color-text-tertiary); }

.search-bar input:focus {
    outline: none;
    border-color: var(--color-accent);
    background: var(--color-surface-hover);
}

.search-bar input[type="search"]::-webkit-search-cancel-button { display: none; }

.search-clear {
    position: absolute;
    right: 0.75rem;
    color: var(--color-text-tertiary);
    font-size: 0.8rem;
    line-height: 1;
}
.search-clear:hover { color: var(--color-heading); }

.chip-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.chip {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.8rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 999px;
    color: var(--color-text-secondary);
    font-size: 0.8125rem;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition);
}

.chip:hover {
    color: var(--color-heading);
    border-color: var(--color-border-hover);
}

.chip.active {
    color: #fff;
    background: var(--grad-accent);
    border-color: transparent;
    box-shadow: var(--glow-accent);
}

.chip-count {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--color-text-tertiary);
}
.chip.active .chip-count { color: rgba(255, 255, 255, 0.75); }

.sort-toggle {
    display: inline-flex;
    margin-left: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.sort-toggle a {
    padding: 0.375rem 0.8rem;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: all var(--transition);
}

.sort-toggle a:hover { color: var(--color-heading); }

.sort-toggle a.active {
    color: var(--color-heading);
    background: var(--color-surface-hover);
}

.result-meta {
    font-size: 0.8125rem;
    color: var(--color-text-tertiary);
    margin-top: 0.25rem;
}

.empty-state {
    text-align: center;
    padding: 4rem 1rem;
    color: var(--color-text-secondary);
}

.empty-state .bi {
    font-size: 2rem;
    color: var(--color-text-tertiary);
    margin-bottom: 0.75rem;
    display: block;
}

.empty-state p { margin-bottom: 1.25rem; }

/* --- Cards / Grid --- */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.25rem;
    padding: 2rem 0;
}

.site-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.site-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.card-thumb {
    position: relative;
    overflow: hidden;
}

.site-card img {
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    display: block;
    transition: transform var(--transition);
}

.site-card:hover img {
    transform: scale(1.04);
}

.card-badge {
    position: absolute;
    top: 0.5rem;
    left: 0.5rem;
    padding: 0.2rem 0.55rem;
    background: rgba(10, 10, 10, 0.72);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    border: 1px solid var(--color-border);
    border-radius: 999px;
    color: var(--color-text);
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.site-card .card-label {
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* --- Buttons --- */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    background: var(--grad-accent);
    color: #fff;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    box-shadow: var(--glow-accent);
    cursor: pointer;
    transition: filter var(--transition), box-shadow var(--transition), transform var(--transition);
    text-decoration: none;
}

.btn-primary:hover {
    filter: brightness(1.08);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: var(--glow-accent-hover);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: transparent;
    color: var(--color-text-secondary);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}

.btn-secondary:hover {
    color: var(--color-heading);
    border-color: var(--color-border-hover);
    background: var(--color-surface);
}

/* --- Offline (dead-link) state — Oculus Go archive --- */
.site-card.is-offline img {
    opacity: 0.5;
    filter: grayscale(0.5);
}
.site-card.is-offline:hover img {
    transform: none;
}
.card-badge.is-offline {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    background: rgba(20, 20, 20, 0.82);
    color: var(--color-text-secondary);
    border-color: var(--color-border-hover);
}
.btn-launch.is-disabled {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    background: var(--color-surface-hover);
    color: var(--color-text-tertiary);
    box-shadow: none;
    cursor: not-allowed;
}
.btn-launch.is-disabled:hover {
    filter: none;
    transform: none;
    box-shadow: none;
}

/* --- Pagination --- */
.pagination-wrap {
    display: flex;
    justify-content: center;
    padding: 2rem 0 3rem;
    gap: 0.25rem;
}

.pagination-wrap .page-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: all var(--transition);
}

.pagination-wrap .page-btn:hover {
    color: var(--color-heading);
    border-color: var(--color-border-hover);
}

.pagination-wrap .page-btn.active {
    color: #fff;
    background: var(--grad-accent);
    border-color: transparent;
    box-shadow: var(--glow-accent);
}

/* --- Glass Panel (detail pages) --- */
.glass-panel {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    box-shadow: var(--shadow-lg);
}

.glass-panel .preview-img-container {
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--color-border);
    margin-bottom: 1.25rem;
}

.glass-panel .preview-img {
    width: 100%;
    display: block;
    transition: transform 0.4s ease;
}

.glass-panel .preview-img:hover {
    transform: scale(1.03);
}

/* --- Detail category pill --- */
.detail-cat {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    margin: 0 0 1.25rem;
    padding: 0.3rem 0.75rem;
    background: var(--color-accent-subtle);
    border: 1px solid rgba(0, 128, 255, 0.25);
    border-radius: 999px;
    color: var(--color-accent);
    font-size: 0.8125rem;
    font-weight: 600;
    text-decoration: none;
    transition: background var(--transition);
}

.detail-cat:hover {
    background: rgba(0, 128, 255, 0.16);
    color: var(--color-accent-hover);
}

/* --- Back Link --- */
.btn-back {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    margin-bottom: 1.5rem;
    transition: color var(--transition);
}

.btn-back:hover {
    color: var(--color-heading);
}

/* --- Launch Button --- */
.btn-launch {
    display: block;
    width: 100%;
    text-align: center;
    padding: 1rem;
    background: var(--grad-accent);
    color: #fff;
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-sm);
    box-shadow: var(--glow-accent);
    transition: filter var(--transition), box-shadow var(--transition), transform var(--transition);
}

.btn-launch:hover {
    filter: brightness(1.08);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: var(--glow-accent-hover);
}

/* --- Play on VR Sites Button (self-hosted experiences) --- */
.btn-vrs-play {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.625rem;
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, #0080ff 0%, #4da6ff 100%);
    color: #fff;
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-sm);
    box-shadow: 0 6px 24px rgba(0, 128, 255, 0.45);
    transition: box-shadow var(--transition), transform var(--transition);
}

.btn-vrs-play:hover {
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 8px 34px rgba(0, 128, 255, 0.7);
}

.btn-vrs-play .vrs-em {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border-radius: 7px;
    background: #fff;
    color: var(--color-accent);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0;
    box-shadow: 0 0 12px rgba(255, 255, 255, 0.45);
}

.btn-vrs-note {
    margin: 0.625rem 0 0;
    text-align: center;
    font-size: 0.78rem;
    color: var(--color-text-secondary);
}

/* --- Source Link --- */
.source-link {
    display: block;
    margin-top: 2rem;
    padding: 1rem 1.25rem;
    border-left: 3px solid var(--color-accent);
    background: var(--color-accent-subtle);
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    transition: background var(--transition);
}

.source-link span {
    color: var(--color-accent);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.source-link:hover {
    background: rgba(0, 128, 255, 0.12);
    color: var(--color-text);
}

/* --- Footer --- */
.site-footer {
    margin-top: auto;
    border-top: 1px solid var(--color-border);
    background: var(--color-surface);
}

.site-footer .footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 3rem 1.5rem 2rem;
}

.site-footer .footer-grid {
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.site-footer .footer-brand img {
    height: 28px;
    width: auto;
    margin-bottom: 1rem;
    opacity: 0.7;
}

.site-footer .footer-brand p {
    font-size: 0.8125rem;
    color: var(--color-text-tertiary);
    line-height: 1.5;
}

.site-footer .footer-heading {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 0.75rem;
}

.site-footer .footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.25rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.site-footer .footer-links a {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    transition: color var(--transition);
}

.site-footer .footer-links a:hover {
    color: var(--color-heading);
}

.site-footer .footer-social {
    display: flex;
    gap: 1rem;
}

.site-footer .footer-social a {
    color: var(--color-text-tertiary);
    font-size: 1.125rem;
    transition: color var(--transition);
}

.site-footer .footer-social a:hover {
    color: var(--color-heading);
}

.site-footer .footer-bottom {
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8125rem;
    color: var(--color-text-tertiary);
}

.site-footer .footer-bottom a {
    color: var(--color-text-tertiary);
}

.site-footer .footer-bottom a:hover {
    color: var(--color-text-secondary);
}

/* --- Utility --- */
.text-secondary {
    color: var(--color-text-secondary) !important;
}

.text-accent {
    color: var(--color-accent) !important;
}

/* --- Section Headers --- */
.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-heading);
    margin-bottom: 0.25rem;
}

.section-subtitle {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .site-nav .container-fluid {
        padding: 0.625rem 1rem;
    }

    .site-nav .nav-title {
        display: none;
    }

    .site-nav .nav-links {
        gap: 1rem;
    }

    .card-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 0.75rem;
        padding: 1.25rem 0;
    }

    .site-card .card-label {
        font-size: 0.8125rem;
        padding: 0.625rem 0.75rem;
    }

    .glass-panel {
        padding: 1.5rem;
    }

    .site-footer .footer-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .site-footer .footer-bottom {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }

    .site-wrapper {
        padding: 0 1rem;
    }
}

@media (max-width: 480px) {
    .card-grid {
        grid-template-columns: 1fr 1fr;
        gap: 0.625rem;
    }
}