/* ==========================================================================
   SpeedX Visual Vault — Ultra HD Wallpaper & Visual Platform Design System
   ========================================================================== */

:root {
    /* Dark Theme Default Tokens */
    --bg-main: #06080f;
    --bg-card: rgba(18, 22, 36, 0.75);
    --bg-card-hover: rgba(26, 32, 52, 0.85);
    --bg-glass: rgba(255, 255, 255, 0.03);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-color-glow: rgba(99, 102, 241, 0.4);

    /* Dynamic Theme Accent Variables */
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-glow: rgba(99, 102, 241, 0.4);
    --accent: #a855f7;

    /* Status Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --sparkle: #f472b6;

    /* Text Colors */
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-dim: #64748b;

    /* Fonts */
    --font-heading: 'Space Grotesk', sans-serif;
    --font-sans: 'Plus Jakarta Sans', sans-serif;

    /* Geometry */
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
}

/* ==========================================================================
   Light Mode Color Palette Overrides
   ========================================================================== */
body.light-mode {
    --bg-main: #f8fafc;
    --bg-card: rgba(255, 255, 255, 0.9);
    --bg-card-hover: rgba(255, 255, 255, 1);
    --bg-glass: rgba(0, 0, 0, 0.03);
    --border-color: rgba(15, 23, 42, 0.08);
    --border-color-glow: rgba(99, 102, 241, 0.3);

    --text-main: #0f172a;
    --text-muted: #64748b;
    --text-dim: #94a3b8;
}

body.light-mode .vault-header,
body.light-mode .category-sticky-bar {
    background: rgba(248, 250, 252, 0.88);
    border-bottom: 1px solid rgba(15, 23, 42, 0.08);
}

body.light-mode .search-bar-wrapper {
    background: rgba(0, 0, 0, 0.04);
    border-color: rgba(15, 23, 42, 0.1);
}
body.light-mode .search-bar-wrapper input {
    color: #0f172a;
}

body.light-mode .hero-title {
    background: linear-gradient(180deg, #0f172a, #475569);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

body.light-mode .wallpaper-card {
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

body.light-mode .lightbox-content,
body.light-mode .publish-card,
body.light-mode .theme-card {
    background: #ffffff;
    border-color: rgba(15, 23, 42, 0.1);
    color: #0f172a;
}
body.light-mode .info-header h2,
body.light-mode .modal-header h3,
body.light-mode .card-title {
    color: #0f172a;
}

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

body.speedx-vault-body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: var(--font-sans);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    transition: background-color 0.3s, color 0.3s;
}

/* Background Particle Canvas */
#particle-canvas {
    position: fixed;
    top: 0; left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
    pointer-events: none;
}

/* Header Bar */
.vault-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(6, 8, 15, 0.85);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    transition: background 0.3s;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
}

.brand-box {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
}

.brand-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 18px;
    box-shadow: 0 0 16px var(--primary-glow);
}

.brand-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 18px;
    letter-spacing: 1px;
    background: linear-gradient(90deg, var(--text-main), var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.brand-sub {
    display: block;
    font-size: 9px;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 1.5px;
}

/* Search Bar */
.search-bar-wrapper {
    flex: 1;
    max-width: 480px;
    margin: 0 20px;
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 8px 16px;
    transition: all 0.2s;
}
.search-bar-wrapper:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 16px var(--primary-glow);
}
.search-icon { color: var(--text-dim); margin-right: 10px; }
.search-bar-wrapper input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-main);
    font-size: 13px;
    outline: none;
}
.keyboard-badge {
    background: rgba(255, 255, 255, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 10px;
    color: var(--text-muted);
    font-weight: 700;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 18px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.25s ease;
    font-family: var(--font-sans);
}

.btn-outline {
    background: transparent;
    border-color: var(--border-color);
    color: var(--text-main);
}
.btn-outline:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--primary);
}

.btn-primary-glow {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    box-shadow: 0 0 16px var(--primary-glow);
}
.btn-primary-glow:hover {
    filter: brightness(1.15);
    box-shadow: 0 0 24px var(--primary-glow);
    transform: translateY(-1px);
}

/* Hero Section */
.hero-vault {
    position: relative;
    z-index: 1;
    padding: 50px 24px 30px;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(99, 102, 241, 0.12);
    border: 1px solid rgba(99, 102, 241, 0.3);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    color: #a5b4fc;
    margin-bottom: 16px;
}

.animate-float {
    animation: float 4s ease-in-out infinite;
}
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

.pulse-dot {
    width: 6px;
    height: 6px;
    background: var(--success);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--success);
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 40px;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.5px;
    margin-bottom: 14px;
    background: linear-gradient(180deg, var(--text-main), var(--text-muted));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 15px;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 24px;
}

.hero-stats-row {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.stat-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-main);
}

/* Category Sticky Bar */
.category-sticky-bar {
    position: sticky;
    top: 64px;
    z-index: 90;
    background: rgba(6, 8, 15, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: 10px 24px;
    transition: background 0.3s;
}

.categories-wrapper {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    gap: 8px;
    overflow-x: auto;
    scrollbar-width: none;
}
.categories-wrapper::-webkit-scrollbar { display: none; }

.cat-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}
.cat-pill:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-main);
}
.cat-pill.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
    box-shadow: 0 0 16px var(--primary-glow);
}

/* Gallery Grid & Cards */
.gallery-main {
    max-width: 1400px;
    margin: 24px auto 80px;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

/* Card Entrance Animation */
.wallpaper-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
    transition: transform 0.25s cubic-bezier(0.2, 0, 0.2, 1), box-shadow 0.3s, border-color 0.3s;
    transform-style: preserve-3d;
    perspective: 1000px;
    cursor: pointer;
    animation: cardEntrance 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
@keyframes cardEntrance {
    from { opacity: 0; transform: translateY(20px) scale(0.96); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.wallpaper-card:hover {
    border-color: var(--border-color-glow);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), 0 0 25px var(--primary-glow);
}

.card-img-container {
    width: 100%;
    height: 220px;
    position: relative;
    overflow: hidden;
}

.card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.wallpaper-card:hover .card-img {
    transform: scale(1.08);
}

.card-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: rgba(6, 8, 15, 0.75);
    backdrop-filter: blur(8px);
    border: 1px solid var(--border-color);
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 10px;
    font-weight: 700;
    color: #fff;
    z-index: 2;
}

.card-overlay-actions {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(6, 8, 15, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 3;
}
.wallpaper-card:hover .card-overlay-actions {
    opacity: 1;
}

.card-action-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.2s;
}
.card-action-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    transform: scale(1.15);
}

.card-details {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.card-title {
    font-family: var(--font-heading);
    font-size: 16px;
    font-weight: 700;
    color: var(--text-main);
}

.card-meta-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-muted);
}

/* Lightbox Modal */
.lightbox-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(6, 8, 15, 0.94);
    backdrop-filter: blur(20px);
    z-index: 300;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}
.lightbox-overlay.hidden { display: none; }

.btn-close-lightbox {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border-color);
    color: #fff;
    font-size: 18px;
    cursor: pointer;
    z-index: 310;
}

.lightbox-content {
    width: 90%;
    max-width: 1100px;
    max-height: 85vh;
    background: var(--bg-card);
    border: 1px solid var(--border-color-glow);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 30px 60px rgba(0,0,0,0.8);
}

.lightbox-layout {
    display: flex;
    height: 100%;
}

.lightbox-img-wrapper {
    flex: 1.4;
    background: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
#lightbox-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.lightbox-info-panel {
    flex: 1;
    padding: 28px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.info-header h2 { font-size: 22px; font-weight: 700; margin: 8px 0; }
.author-tag { font-size: 12px; color: var(--text-muted); }

.spec-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin: 20px 0;
}
.spec-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
    font-size: 13px;
}
.spec-label { color: var(--text-muted); display: flex; align-items: center; gap: 8px; }
.palette-swatches { display: flex; gap: 6px; }
.swatch { width: 16px; height: 16px; border-radius: 50%; }

.download-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.dl-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 13px;
    text-decoration: none;
    transition: all 0.2s;
}
.dl-btn.primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    box-shadow: 0 0 16px var(--primary-glow);
}
.dl-btn.secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-main);
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(6, 8, 15, 0.88);
    backdrop-filter: blur(12px);
    z-index: 250;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}
.modal-overlay.hidden { display: none; }

.publish-card, .theme-card {
    width: 100%;
    max-width: 500px;
    background: var(--bg-card);
    border: 1px solid var(--border-color-glow);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.7);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}
.modal-header h3 { font-size: 16px; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.btn-icon { background: transparent; border: none; color: var(--text-muted); font-size: 18px; cursor: pointer; }

.publish-form {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.form-group label { font-size: 12px; font-weight: 600; color: var(--text-muted); }
.form-group input, .form-group select {
    background: rgba(0, 0, 0, 0.15);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 10px;
    color: var(--text-main);
    font-size: 13px;
    outline: none;
}

.form-row { display: flex; gap: 12px; }
.form-row .form-group { flex: 1; }

.form-actions { display: flex; justify-content: flex-end; gap: 12px; margin-top: 10px; }

/* Theme Presets */
.theme-presets-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}
.preset-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
}
.preset-option.active { border-color: var(--primary); background: rgba(99, 102, 241, 0.15); }
.preset-dot { width: 14px; height: 14px; border-radius: 50%; }

/* Mobile Bottom Nav Bar */
.mobile-bottom-nav {
    display: none;
}

/* ==========================================================================
   Mobile & Responsive Styles (< 768px)
   ========================================================================== */
@media (max-width: 768px) {
    .desktop-only { display: none !important; }

    .header-container {
        padding: 0 16px;
        height: 56px;
    }

    .brand-sub { display: none; }

    .search-bar-wrapper {
        margin: 0 10px;
        padding: 6px 12px;
    }
    .keyboard-badge { display: none; }

    .hero-vault {
        padding: 30px 16px 20px;
    }
    .hero-title {
        font-size: 26px;
    }
    .hero-subtitle {
        font-size: 13px;
        margin-bottom: 16px;
    }
    .hero-stats-row {
        gap: 8px;
    }
    .stat-pill {
        padding: 6px 12px;
        font-size: 11px;
    }

    .category-sticky-bar {
        top: 56px;
        padding: 8px 16px;
    }

    .gallery-main {
        padding: 0 16px;
        margin-bottom: 100px;
    }

    .gallery-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .card-img-container {
        height: 200px;
    }

    /* Fixed Mobile Bottom Navigation Bar */
    .mobile-bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0; left: 0; right: 0;
        height: 60px;
        background: rgba(6, 8, 15, 0.92);
        backdrop-filter: blur(16px);
        border-top: 1px solid var(--border-color);
        z-index: 200;
        align-items: center;
        justify-content: space-around;
        padding: 0 10px;
    }
    body.light-mode .mobile-bottom-nav {
        background: rgba(248, 250, 252, 0.94);
        border-top: 1px solid rgba(15, 23, 42, 0.1);
    }

    .nav-item {
        background: transparent;
        border: none;
        color: var(--text-muted);
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 4px;
        font-size: 10px;
        font-weight: 600;
        cursor: pointer;
        flex: 1;
    }
    .nav-item i { font-size: 16px; }
    .nav-item.active { color: var(--primary); }

    .nav-item-publish {
        width: 44px;
        height: 44px;
        border-radius: 50%;
        background: linear-gradient(135deg, var(--primary), var(--accent));
        color: #fff;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 18px;
        box-shadow: 0 0 16px var(--primary-glow);
        transform: translateY(-12px);
        flex: initial;
    }

    /* Lightbox Mobile Bottom Sheet */
    .lightbox-content {
        width: 100%;
        max-height: 90vh;
        border-radius: 20px 20px 0 0;
    }
    .lightbox-layout {
        flex-direction: column;
        overflow-y: auto;
    }
    .lightbox-img-wrapper {
        height: 240px;
    }
    .lightbox-info-panel {
        padding: 20px;
    }
}