/* ========================================
   Pink Gallery — Premium UI Design System
   ======================================== */

:root {
    /* Primary Pink Palette */
    --pink-50: #fdf2f6;
    --pink-100: #fce7ef;
    --pink-200: #fbcfe2;
    --pink-300: #f9a8c7;
    --pink-400: #f472a6;
    --pink-500: #ec4899;
    --pink-600: #db2777;
    --pink-700: #be185d;
    --pink-800: #9d174d;
    --pink-900: #831843;
    /* Accent */
    --rose-400: #fb7185;
    --rose-500: #f43f5e;
    --rose-600: #e11d48;
    /* Neutrals */
    --white: #ffffff;
    --gray-50: #fafafa;
    --gray-100: #f4f4f5;
    --gray-200: #e4e4e7;
    --gray-700: #3f3f46;
    --gray-900: #18181b;
    /* Semantic */
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;

    /* Theme Tokens */
    --bg-primary: #fdf2f6;
    --bg-card: rgba(255,255,255,0.72);
    --bg-card-solid: #ffffff;
    --text-primary: #831843;
    --text-secondary: #9d174d;
    --text-muted: #be185d;
    --text-soft: rgba(131,24,67,0.55);
    --border-color: rgba(236,72,153,0.18);
    --border-strong: rgba(236,72,153,0.35);
    --gradient-brand: linear-gradient(135deg, #ec4899 0%, #db2777 50%, #be185d 100%);
    --gradient-warm: linear-gradient(135deg, #f472a6 0%, #ec4899 50%, #f43f5e 100%);
    --gradient-subtle: linear-gradient(135deg, #fdf2f6 0%, #fce7ef 50%, #fbcfe2 100%);
    --gradient-dark: linear-gradient(180deg, #831843 0%, #9d174d 30%, #be185d 60%, #db2777 100%);
    --glass-bg: rgba(255,255,255,0.55);
    --glass-border: rgba(255,255,255,0.6);
    --glass-shadow: 0 8px 32px rgba(236,72,153,0.12);
    --shadow-xs: 0 1px 2px rgba(131,24,67,0.06);
    --shadow-sm: 0 2px 8px rgba(131,24,67,0.08);
    --shadow-md: 0 4px 16px rgba(131,24,67,0.10);
    --shadow-lg: 0 12px 40px rgba(131,24,67,0.14);
    --shadow-xl: 0 20px 60px rgba(131,24,67,0.18);
    --shadow-glow: 0 0 30px rgba(236,72,153,0.25);
    --radius-xs: 6px;
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --radius-full: 9999px;
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ====== Animations ====== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInScale {
    from { opacity: 0; transform: scale(0.92); }
    to   { opacity: 1; transform: scale(1); }
}
@keyframes shimmer {
    0%   { background-position: -400px 0; }
    100% { background-position: 400px 0; }
}
@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 0 0 rgba(236,72,153,0.4); }
    50%      { box-shadow: 0 0 0 12px rgba(236,72,153,0); }
}
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-6px); }
}
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes slideInRight { from { transform: translateX(120%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes slideInUp    { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
@keyframes gradientFlow { 0% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } 100% { background-position: 0% 50%; } }

/* ====== Reset ====== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    position: relative;
}
/* Animated background orbs */
body::before {
    content: '';
    position: fixed; inset: 0; z-index: -2;
    background: 
        radial-gradient(ellipse 80% 60% at 20% 20%,  rgba(244,114,182,0.18) 0%, transparent 60%),
        radial-gradient(ellipse 60% 80% at 80% 80%,  rgba(251,113,133,0.15) 0%, transparent 60%),
        radial-gradient(ellipse 50% 50% at 50% 50%,  rgba(236,72,153,0.08) 0%, transparent 50%);
    animation: float 20s ease-in-out infinite;
}
body::after {
    content: '';
    position: fixed; inset: 0; z-index: -1;
    background: 
        radial-gradient(ellipse 70% 50% at 90% 10%, rgba(251,113,133,0.12) 0%, transparent 50%),
        radial-gradient(ellipse 50% 70% at 10% 90%, rgba(244,114,182,0.15) 0%, transparent 50%);
    animation: float 24s ease-in-out infinite reverse;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }

/* ====== Layout ====== */
.app-layout { display: flex; min-height: 100vh; }

/* ====== Sidebar — Glass Morphism ====== */
.sidebar {
    width: 272px;
    background: rgba(131,24,67,0.88);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-right: 1px solid rgba(255,255,255,0.08);
    color: #fff;
    position: fixed; top: 0; left: 0; bottom: 0;
    z-index: 100;
    display: flex; flex-direction: column;
    transition: transform var(--transition), opacity var(--transition);
    box-shadow: 8px 0 40px rgba(131,24,67,0.2);
}
.sidebar-logo {
    padding: 30px 26px 22px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    position: relative;
    overflow: hidden;
}
.sidebar-logo::after {
    content: ''; position: absolute; top: -22px; right: -22px;
    width: 74px; height: 74px; border-radius: 50%;
    background: rgba(236,72,153,0.14); filter: blur(22px);
}
.sidebar-logo h1 {
    font-size: 22px; font-weight: 800; letter-spacing: 0;
    line-height: 1.15;
    position: relative; z-index: 2;
    color: #fff;
    -webkit-text-fill-color: #fff;
    text-shadow: 0 6px 18px rgba(131,24,67,0.16);
}
.sidebar-logo .subtitle {
    font-size: 12px; opacity: 0.72; margin-top: 5px; letter-spacing: 0.2px; line-height: 1.4; position: relative; z-index: 2;
    color: rgba(255,255,255,0.86);
}
.sidebar-nav { flex: 1; padding: 12px 0; overflow-y: auto; overflow-x: hidden; }
.sidebar-nav .nav-section {
    padding: 16px 28px 8px; font-size: 10px; text-transform: uppercase;
    letter-spacing: 2px; opacity: 0.35; font-weight: 700;
}
.sidebar-nav a {
    display: flex; align-items: center; gap: 14px;
    padding: 13px 28px; margin: 2px 12px;
    font-size: 14px; font-weight: 500;
    transition: all var(--transition);
    border-radius: var(--radius-sm);
    color: rgba(255,255,255,0.7);
    position: relative;
}
.sidebar-nav a:hover {
    background: rgba(255,255,255,0.1);
    color: #fff; transform: translateX(3px);
}
.sidebar-nav a.active {
    background: rgba(255,255,255,0.15);
    color: #fff; font-weight: 700;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
.sidebar-nav a.active::before {
    content: ''; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
    width: 3px; height: 20px; border-radius: 3px; background: var(--pink-300);
}
.sidebar-nav a .icon { font-size: 19px; width: 24px; text-align: center; line-height: 1; }

/* Sidebar Toggle */
.sidebar-toggle {
    display: none; position: fixed; top: 22px; right: 22px; z-index: 200;
    width: 42px; height: 42px; border-radius: 14px;
    background: rgba(131,24,67,0.88); backdrop-filter: blur(14px);
    color: #fff; border: 1px solid rgba(255,255,255,0.15);
    cursor: pointer; font-size: 19px;
    box-shadow: var(--shadow-md); transition: all var(--transition);
}
.sidebar-toggle:hover { transform: scale(1.05); background: rgba(155,23,76,0.94); }
.sidebar-overlay {
    display: none; position: fixed; inset: 0;
    background: rgba(0,0,0,0.45); backdrop-filter: blur(4px);
    z-index: 99; transition: opacity var(--transition);
}

/* ====== Main Content ====== */
.main-content {
    flex: 1; margin-left: 272px; min-height: 100vh;
    animation: fadeInUp 0.5s ease;
}
.page-header {
    background: var(--glass-bg); backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-color);
    padding: 22px 36px; position: sticky; top: 0; z-index: 50;
    text-align: center;
}
.page-header h2 {
    font-size: 26px; font-weight: 800; letter-spacing: -0.5px;
    background: var(--gradient-warm); -webkit-background-clip: text;
    -webkit-text-fill-color: transparent; background-clip: text;
    display: inline-block;
}
.page-body { padding: 28px 36px; }

/* ====== Filter Bar ====== */
.filter-bar {
    display: flex; flex-wrap: wrap; gap: 14px; align-items: center;
    padding: 18px 24px;
    background: var(--bg-card); backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg); margin-bottom: 28px;
    box-shadow: var(--shadow-sm);
}
.filter-bar label { font-size: 13px; color: var(--text-muted); font-weight: 600; letter-spacing: 0.3px; }
.filter-bar select,
.filter-bar input {
    padding: 10px 16px;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-sm); font-size: 14px;
    color: var(--text-primary); background: var(--white);
    outline: none; transition: all var(--transition-fast);
    cursor: pointer; appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23be185d' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat; background-position: right 12px center;
    padding-right: 36px;
}
.filter-bar select:hover, .filter-bar input:hover { border-color: var(--pink-400); }
.filter-bar select:focus, .filter-bar input:focus {
    border-color: var(--pink-500); box-shadow: 0 0 0 4px rgba(236,72,153,0.08);
}

/* ====== Buttons ====== */
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 10px 22px; border: none; border-radius: var(--radius-full);
    cursor: pointer; font-size: 14px; font-weight: 600; letter-spacing: 0.2px;
    transition: all var(--transition); position: relative; overflow: hidden;
    white-space: nowrap;
}
.btn::after {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(circle at center, rgba(255,255,255,0.25) 0%, transparent 70%);
    opacity: 0; transition: opacity 0.4s;
}
.btn:hover::after { opacity: 1; }
.btn:active { transform: scale(0.96); }

.btn-primary {
    background: var(--gradient-brand); color: #fff;
    box-shadow: 0 4px 15px rgba(219,39,119,0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(219,39,119,0.4); }

.btn-secondary { background: var(--pink-100); color: var(--pink-700); }
.btn-secondary:hover { background: var(--pink-200); transform: translateY(-1px); }

.btn-danger { background: linear-gradient(135deg, #ef4444, #dc2626); color: #fff; box-shadow: 0 4px 15px rgba(239,68,68,0.3); }
.btn-danger:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(239,68,68,0.4); }

.btn-outline {
    background: transparent; border: 2px solid var(--pink-400); color: var(--pink-600);
}
.btn-outline:hover { background: var(--pink-50); border-color: var(--pink-500); }

.btn-ghost { background: transparent; color: var(--pink-600); }
.btn-ghost:hover { background: var(--pink-50); }

.btn-sm { padding: 6px 14px; font-size: 12px; }
.btn-lg { padding: 14px 32px; font-size: 16px; border-radius: var(--radius-lg); }

/* ====== Waterfall Grid ====== */
.waterfall {
    columns: 4; column-gap: 18px;
}
.waterfall-item {
    break-inside: avoid; margin-bottom: 18px;
    border-radius: var(--radius-md); overflow: hidden;
    cursor: pointer; background: var(--bg-card-solid);
    box-shadow: var(--shadow-sm); transition: all var(--transition);
    position: relative;
    animation: fadeInUp 0.5s ease both;
}
.waterfall-item.image-card img,
.waterfall-item.image-card {
    width: 100%;
    aspect-ratio: 3 / 4;
}
.waterfall-item.image-card img {
    object-fit: cover;
    display: block;
}
.waterfall-item.video-card .video-preview {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: #000;
}
.waterfall-item.video-card video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    filter: saturate(1.02) contrast(1.02);
}
.video-play-badge {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 44px;
    color: #fff;
    background: linear-gradient(180deg, rgba(0,0,0,0.05), rgba(0,0,0,0.28));
    text-shadow: 0 6px 24px rgba(0,0,0,0.5);
    pointer-events: none;
}
.waterfall-item:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(236,72,153,0.08);
}
.waterfall-item:active { transform: scale(0.98); }
.waterfall-item img { width: 100%; display: block; transition: transform 0.5s; }
.waterfall-item:hover img { transform: scale(1.04); }

/* ====== Lightbox ====== */
.lightbox-overlay {
    display: none; position: fixed; inset: 0;
    background: rgba(0,0,0,0.94); z-index: 1000;
    justify-content: center; align-items: center; flex-direction: column;
    animation: fadeInScale 0.3s ease;
}
.lightbox-overlay.active { display: flex; }
.lightbox-content { max-width: 92vw; max-height: 82vh; position: relative; display: flex; align-items: center; justify-content: center; }
.lightbox-content img {
    max-width: 100%; max-height: 82vh; object-fit: contain;
    border-radius: 8px; box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.lightbox-close {
    position: fixed; top: 24px; right: 32px;
    width: 48px; height: 48px; border-radius: var(--radius-full);
    background: rgba(255,255,255,0.1); backdrop-filter: blur(8px);
    color: #fff; border: 1px solid rgba(255,255,255,0.15);
    cursor: pointer; font-size: 22px; display: flex; align-items: center; justify-content: center;
    z-index: 1010; transition: all var(--transition);
}
.lightbox-close:hover { background: rgba(255,255,255,0.25); transform: scale(1.08); }
.lightbox-nav {
    position: absolute; top: 50%; transform: translateY(-50%);
    width: 52px; height: 52px; border-radius: var(--radius-full);
    background: rgba(255,255,255,0.1); backdrop-filter: blur(8px);
    color: #fff; border: 1px solid rgba(255,255,255,0.15);
    cursor: pointer; font-size: 20px; display: flex; align-items: center; justify-content: center;
    transition: all var(--transition); z-index: 1010;
}
.lightbox-nav:hover { background: var(--pink-500); border-color: var(--pink-500); transform: translateY(-50%) scale(1.08); }
.lightbox-prev { left: 24px; }
.lightbox-next { right: 24px; }
.lightbox-toolbar { display: flex; gap: 14px; margin-top: 22px; }
.lightbox-toolbar button {
    padding: 12px 28px; border-radius: var(--radius-full);
    border: 1.5px solid rgba(255,255,255,0.2);
    background: rgba(255,255,255,0.06); backdrop-filter: blur(8px);
    color: #fff; cursor: pointer; font-size: 14px; font-weight: 600;
    transition: all var(--transition); display: flex; align-items: center; gap: 8px;
}
.lightbox-toolbar button:hover { background: var(--pink-600); border-color: var(--pink-600); transform: translateY(-2px); box-shadow: var(--shadow-glow); }
.lightbox-info { display: none; }

/* ====== Video Modal ====== */
.video-modal-overlay {
    display: none; position: fixed; inset: 0;
    background: rgba(0,0,0,0.92); z-index: 1000;
    justify-content: center; align-items: center;
    animation: fadeInScale 0.3s ease;
}
.video-modal-overlay.active { display: flex; }
.video-modal-content {
    width: min(92vw, 1080px);
    max-height: 82vh;
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
    background: #000;
}
.video-modal-content video {
    width: 100%;
    height: auto;
    max-height: 82vh;
    display: block;
    outline: none;
    border-radius: var(--radius-md);
}

.toolbar-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}
.page-actions {
    display: flex;
    justify-content: flex-start;
    margin-bottom: 0;
}
.image-card,
.video-card {
    will-change: transform, opacity;
}
@media (max-width: 767px) {
    .toolbar-row {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
        margin-bottom: 12px;
    }
    .page-actions {
        width: 100%;
    }
}

.pagination { display: flex; justify-content: center; gap: 6px; margin-top: 36px; flex-wrap: wrap; text-align: center; }
.pagination button {
    min-width: 40px; height: 40px; border-radius: var(--radius-sm);
    border: 1.5px solid var(--border-color);
    background: var(--bg-card-solid); cursor: pointer; font-size: 14px; font-weight: 600;
    color: var(--text-secondary); transition: all var(--transition-fast);
}
.pagination button:hover { border-color: var(--pink-400); color: var(--pink-600); background: var(--pink-50); }
.pagination button.active {
    background: var(--gradient-brand); color: #fff; border-color: transparent;
    box-shadow: 0 4px 12px rgba(219,39,119,0.3);
}
.pagination button:disabled { opacity: 0.3; cursor: not-allowed; pointer-events: none; }

/* ====== Admin Section Card ====== */
.admin-section {
    background: var(--bg-card); backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm); margin-bottom: 28px;
    overflow: hidden;
    animation: fadeInUp 0.4s ease both;
}
.admin-section-header {
    padding: 22px 28px; border-bottom: 1px solid var(--border-color);
    display: flex; justify-content: space-between; align-items: center;
    background: var(--gradient-subtle);
}
.admin-section-header h3 { font-size: 18px; font-weight: 700; color: var(--pink-800); letter-spacing: -0.3px; }
.admin-section-body { padding: 28px; }

/* ====== Upload Zone ====== */
.upload-zone {
    border: 2px dashed var(--pink-300);
    border-radius: var(--radius-lg); padding: 56px 32px;
    text-align: center; cursor: pointer;
    transition: all var(--transition);
    background: linear-gradient(135deg, rgba(253,242,246,0.6) 0%, rgba(252,231,239,0.6) 100%);
    position: relative; overflow: hidden;
}
.upload-zone::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(ellipse at center, rgba(236,72,153,0.06) 0%, transparent 70%);
    transition: opacity var(--transition); opacity: 0;
}
.upload-zone:hover::before, .upload-zone.drag-over::before { opacity: 1; }
.upload-zone:hover, .upload-zone.drag-over {
    border-color: var(--pink-500); border-style: solid;
    background: linear-gradient(135deg, rgba(253,242,246,0.8) 0%, rgba(252,231,239,0.8) 100%);
    box-shadow: var(--shadow-md);
}
.upload-zone .upload-icon { font-size: 56px; margin-bottom: 16px; animation: float 3s ease-in-out infinite; }
.upload-zone p { font-size: 15px; color: var(--text-muted); position: relative; z-index: 1; }
.upload-zone .upload-hint { font-size: 12px; color: var(--text-soft); margin-top: 6px; }

/* Upload Queue */
.upload-queue { margin-top: 24px; }
.upload-queue-item {
    display: flex; align-items: center; gap: 14px;
    padding: 14px 18px; background: var(--bg-card-solid);
    border: 1px solid var(--border-color); border-radius: var(--radius-sm);
    margin-bottom: 10px; transition: all var(--transition);
    box-shadow: var(--shadow-xs);
}
.upload-queue-item:hover { box-shadow: var(--shadow-sm); }
.upload-progress { flex: 1; height: 8px; background: var(--pink-100); border-radius: 4px; overflow: hidden; }
.upload-progress-bar {
    height: 100%; background: var(--gradient-brand); border-radius: 4px;
    transition: width 0.4s ease; position: relative; overflow: hidden;
}
.upload-progress-bar::after {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: shimmer 1.5s infinite;
}

/* ====== Admin Grid ====== */
.admin-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(175px, 1fr)); gap: 14px; }
.admin-grid-item {
    background: var(--bg-card-solid); border: 2px solid transparent;
    border-radius: var(--radius-md); padding: 12px;
    cursor: pointer; transition: all var(--transition); position: relative;
    box-shadow: var(--shadow-xs); overflow: hidden;
    animation: fadeInUp 0.4s ease both;
}
.admin-grid-item:nth-child(n) { animation-delay: calc(0.03s * var(--i, 0)); }
.admin-grid-item:hover {
    border-color: var(--pink-300); box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}
.admin-grid-item.selected {
    border-color: var(--pink-500); background: var(--pink-50);
    box-shadow: 0 0 0 4px rgba(236,72,153,0.1);
}
.admin-grid-item .check-box {
    position: absolute; top: 10px; right: 10px; z-index: 2;
    width: 24px; height: 24px; border-radius: var(--radius-xs);
    border: 2px solid var(--border-color); background: var(--white);
    display: flex; align-items: center; justify-content: center;
    font-size: 12px; color: #fff; transition: all var(--transition-fast);
}
.admin-grid-item.selected .check-box { background: var(--pink-500); border-color: var(--pink-500); }
.admin-grid-item img {
    width: 100%; aspect-ratio: 4/3; object-fit: cover;
    border-radius: var(--radius-sm); margin-bottom: 10px;
    transition: transform 0.3s;
}
.admin-grid-item .item-name {
    font-size: 12px; color: var(--text-secondary); font-weight: 500;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

/* ====== Category Tree ====== */
.category-tree { padding: 4px 0; }
.category-item {
    display: flex; align-items: center; gap: 10px; padding: 11px 16px;
    margin: 3px 0; border-radius: var(--radius-sm);
    cursor: default; transition: all var(--transition-fast);
    font-size: 14px; position: relative; border-left: 3px solid transparent;
}
.category-item:hover { background: var(--pink-50); border-left-color: var(--pink-300); }
.category-item .sort-btns {
    display: flex; gap: 2px; margin-right: 2px; flex-shrink: 0;
}
.sort-btns button {
    width: 24px; height: 20px; border: 1px solid var(--border-color);
    background: var(--bg-card-solid); color: var(--text-soft);
    border-radius: 4px; cursor: pointer; font-size: 11px;
    display: flex; align-items: center; justify-content: center;
    transition: all var(--transition-fast); line-height: 1; padding: 0;
}
.sort-btns button:hover {
    background: var(--pink-100); color: var(--pink-700); border-color: var(--pink-400);
}
.sort-btns button:active { background: var(--pink-200); }
.category-item .cat-icon { font-size: 18px; }
.category-item.parent-cat { font-weight: 700; color: var(--pink-800); font-size: 15px; }
.category-item.parent-cat::before { content: '📁'; margin-right: 6px; font-size: 16px; }
.category-item.child-cat { padding-left: 44px; font-size: 13px; color: var(--text-secondary); }
.category-item.child-cat::before { content: '└'; margin-right: 8px; color: var(--pink-300); }
.category-item .cat-actions {
    margin-left: auto; display: flex; gap: 6px;
    opacity: 0; transform: translateX(8px); transition: all var(--transition);
}
.category-item:hover .cat-actions { opacity: 1; transform: translateX(0); }
.cat-actions button {
    padding: 4px 10px; font-size: 11px; font-weight: 600;
    border-radius: var(--radius-xs); border: none; cursor: pointer;
    background: var(--pink-100); color: var(--pink-700);
    transition: all var(--transition-fast);
}
.cat-actions button:hover { background: var(--pink-200); transform: translateY(-1px); }
.cat-actions button.danger { background: #fee2e2; color: #dc2626; }
.cat-actions button.danger:hover { background: #fecaca; }

/* ====== Modal ====== */
.modal-overlay {
    display: none; position: fixed; inset: 0;
    background: rgba(0,0,0,0.5); backdrop-filter: blur(6px);
    z-index: 999; justify-content: center; align-items: center;
}
.modal-overlay.active { display: flex; animation: fadeInScale 0.25s ease; }
.modal {
    background: var(--bg-card-solid); border-radius: var(--radius-lg);
    padding: 36px; max-width: 480px; width: 92%;
    box-shadow: var(--shadow-xl); animation: slideInUp 0.35s ease;
    border: 1px solid var(--border-color);
}
.modal h3 { font-size: 21px; font-weight: 700; color: var(--pink-800); margin-bottom: 24px; letter-spacing: -0.3px; }
.modal p { color: var(--text-secondary); line-height: 1.7; }
.modal .form-group { margin-bottom: 18px; }
.modal .form-group label { display: block; font-size: 13px; font-weight: 600; color: var(--text-soft); margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.5px; }
.modal .form-group input,
.modal .form-group select {
    width: 100%; padding: 12px 16px;
    border: 1.5px solid var(--border-color); border-radius: var(--radius-sm);
    font-size: 15px; color: var(--text-primary); outline: none;
    transition: all var(--transition-fast); background: var(--gray-50);
}
.modal .form-group input:focus,
.modal .form-group select:focus {
    border-color: var(--pink-500); background: #fff;
    box-shadow: 0 0 0 4px rgba(236,72,153,0.06);
}
.modal-actions { display: flex; gap: 12px; justify-content: flex-end; margin-top: 28px; }

/* ====== Toast ====== */
.toast-container {
    position: fixed; top: 24px; right: 24px; z-index: 9999;
    display: flex; flex-direction: column; gap: 10px; pointer-events: none;
}
.toast {
    padding: 15px 26px; border-radius: var(--radius-sm);
    color: #fff; font-size: 14px; font-weight: 600;
    box-shadow: var(--shadow-lg); animation: slideInRight 0.35s ease;
    max-width: 380px; pointer-events: auto;
    backdrop-filter: blur(12px);
}
.toast.success { background: linear-gradient(135deg, #10b981, #059669); }
.toast.error   { background: linear-gradient(135deg, #ef4444, #dc2626); }
.toast.info    { background: var(--gradient-brand); }

/* ====== Loading ====== */
.loading { text-align: center; padding: 64px 24px; color: var(--text-muted); }
.spinner {
    width: 44px; height: 44px;
    border: 3px solid var(--pink-100);
    border-top-color: var(--pink-500);
    border-radius: 50%; animation: spin 0.7s linear infinite;
    margin: 0 auto 18px;
}
.loading p { font-size: 14px; color: var(--text-soft); }

/* ====== Empty State ====== */
.empty-state { text-align: center; padding: 80px 24px; color: var(--text-muted); }
.empty-state .icon { font-size: 72px; margin-bottom: 20px; opacity: 0.4; }
.empty-state p { font-size: 15px; color: var(--text-soft); }

/* ====== Stats Cards ====== */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; margin-bottom: 28px; }
.stat-card {
    background: var(--bg-card); backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg); padding: 24px 28px;
    box-shadow: var(--shadow-sm);
    display: flex; align-items: center; gap: 18px;
    transition: all var(--transition); cursor: default;
    animation: fadeInUp 0.5s ease both;
}
.stat-card:nth-child(1) { animation-delay: 0.05s; }
.stat-card:nth-child(2) { animation-delay: 0.1s; }
.stat-card:nth-child(3) { animation-delay: 0.15s; }
.stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.stat-card .stat-icon {
    width: 56px; height: 56px; border-radius: var(--radius-md);
    background: var(--gradient-warm);
    display: flex; align-items: center; justify-content: center;
    font-size: 26px; color: #fff; flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(236,72,153,0.25);
}
.stat-card .stat-value {
    font-size: 32px; font-weight: 800; color: var(--pink-800); line-height: 1.1;
    letter-spacing: -0.5px;
}
.stat-card .stat-label { font-size: 13px; color: var(--text-soft); margin-top: 2px; font-weight: 500; }

/* ====== Batch Action Bar ====== */
.batch-bar {
    display: none; background: var(--gradient-dark); color: #fff;
    padding: 14px 24px; border-radius: var(--radius-md);
    margin-bottom: 18px; align-items: center; gap: 16px;
    box-shadow: var(--shadow-md); animation: slideInUp 0.3s ease;
}
.batch-bar.active { display: flex; }
.batch-bar .selected-count { font-weight: 700; font-size: 16px; }
.batch-bar .btn { background: rgba(255,255,255,0.15); color: #fff; border: 1px solid rgba(255,255,255,0.2); }

/* ====== Table (Optional) ====== */
.table-wrap { overflow-x: auto; border-radius: var(--radius-md); }
table { width: 100%; border-collapse: collapse; }
table th {
    padding: 14px 18px; text-align: left; font-size: 12px; text-transform: uppercase;
    letter-spacing: 0.8px; color: var(--text-soft); font-weight: 700;
    border-bottom: 2px solid var(--border-color); background: var(--gray-50);
}
table td { padding: 12px 18px; font-size: 14px; border-bottom: 1px solid var(--border-color); vertical-align: middle; }
table tr { transition: background var(--transition-fast); }
table tr:hover td { background: var(--pink-50); }

/* ====== Glass Card Utility ====== */
.glass-card {
    background: var(--bg-card); backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg); padding: 28px;
    box-shadow: var(--shadow-sm);
}

/* ====== Responsive – Tablet (768px–1024px) ====== */
@media (max-width: 1024px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .sidebar-toggle { display: flex; align-items: center; justify-content: center; top: 18px; right: 18px; }
    .sidebar-overlay.open { display: block; }
    .main-content { margin-left: 0; }
    .waterfall { columns: 3; column-gap: 14px; }
    .sidebar-logo {
        padding: 26px 22px 18px;
    }
    .sidebar-logo h1 {
        font-size: 20px;
    }
    .sidebar-logo .subtitle {
        font-size: 11px;
    }
    .admin-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
    .stats-grid { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
    .toolbar-row {
        align-items: center;
        flex-wrap: wrap;
        gap: 12px;
    }
    .page-actions {
        flex: 0 0 auto;
    }
    .filter-bar {
        flex: 1 1 auto;
        margin-bottom: 0;
    }
}

/* ====== Responsive – Mobile (360px–767px) ====== */
@media (max-width: 767px) {
    .waterfall { columns: 2; column-gap: 10px; }
    .waterfall-item { margin-bottom: 10px; border-radius: var(--radius-sm); }
    .page-body { padding: 14px; }
    .page-header { padding: 16px 16px 12px; text-align: center; }
    .page-header h2 { font-size: 19px; display: inline-block; }
    .toolbar-row {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
        margin-bottom: 10px;
    }
    .page-actions { width: 100%; display: flex; justify-content: center; }
    .filter-bar {
        flex-direction: row;
        flex-wrap: wrap;
        align-items: center;
        gap: 8px;
        padding: 12px 14px;
        margin-bottom: 0;
    }
    .filter-bar label { font-size: 12px; margin-right: 2px; }
    .filter-bar select, .filter-bar input { flex: 1 1 0; min-width: 0; padding: 8px 28px 8px 12px; font-size: 13px; }
    .stats-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
    .stat-card { padding: 16px; gap: 12px; }
    .stat-card .stat-icon { width: 42px; height: 42px; font-size: 20px; border-radius: var(--radius-sm); }
    .stat-card .stat-value { font-size: 24px; }
    .admin-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 8px; }
    .admin-section-body { padding: 16px; }
    .modal { padding: 24px; }
    .lightbox-nav { width: 40px; height: 40px; font-size: 16px; }
    .lightbox-prev { left: 10px; }
    .lightbox-next { right: 10px; }
    .lightbox-close { top: 12px; right: 14px; width: 40px; height: 40px; font-size: 18px; }
    table { font-size: 12px; }
    table th, table td { padding: 8px 10px; }
    .upload-zone { padding: 36px 16px; }
    .upload-zone .upload-icon { font-size: 40px; }
}