/**
 * Video Management System - Dark Tech Theme
 *
 * Professional dark theme with modern tech aesthetics.
 */

/* ============================================
   CSS Variables - Dark Tech Theme
   ============================================ */
:root {
    /* Primary Colors - Cyan/Blue Tech */
    --color-primary: #00d4ff;
    --color-primary-dark: #00a8cc;
    --color-primary-light: #5de0ff;
    --color-primary-rgb: 0, 212, 255;

    /* Secondary Colors */
    --color-secondary: #7c3aed;
    --color-accent: #00ff88;
    --color-success: #00ff88;
    --color-warning: #fbbf24;
    --color-danger: #ff3366;

    /* Dark Backgrounds */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --bg-card: #16161f;
    --bg-elevated: #1e1e2a;
    --bg-hover: #252535;

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #6b6b80;
    --text-inverse: #0a0a0f;

    /* Borders & Lines */
    --border-color: #2a2a3a;
    --border-color-light: #3a3a4a;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;

    /* Glows & Shadows */
    --glow-primary: 0 0 20px rgba(0, 212, 255, 0.3);
    --glow-primary-strong: 0 0 30px rgba(0, 212, 255, 0.5);
    --glow-success: 0 0 20px rgba(0, 255, 136, 0.3);
    --glow-danger: 0 0 20px rgba(255, 51, 102, 0.3);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 12px 40px rgba(0, 0, 0, 0.6);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;
}

/* ============================================
   Reset & Base
   ============================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative; /* Necessário para o posicionamento dos ::before e ::after */
}

/* Camada da Imagem de Fundo com Overlay */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    
    /* Overlay escuro (60%) e Imagem centralizada */
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), 
                url('https://img.freepik.com/premium-photo/women-volleyball-players-spiking-ball-net_641503-99016.jpg');
    
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed; /* Mantém a imagem estática ao rolar */
    
    z-index: -2; /* Fica atrás de tudo */
}

/* Camada do Grid Animado */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(0, 212, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.05) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: -1; /* Fica acima da imagem, mas atrás do conteúdo */
}

/* ============================================
   Scrollbar
   ============================================ */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color-light);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary);
}

/* ============================================
   Layout
   ============================================ */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.main-content {
    padding: var(--spacing-xl) 0;
}

/* ============================================
   Header
   ============================================ */
.header {
    background: linear-gradient(180deg, var(--bg-secondary) 0%, rgba(18, 18, 26, 0.95) 100%);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
    opacity: 0.5;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-normal);
}

.logo:hover {
    color: var(--color-primary);
    text-shadow: var(--glow-primary);
}

.logo:hover .logo-img {
    filter: drop-shadow(0 0 12px rgba(0, 212, 255, 0.6));
}

.logo-img {
    height: 70px !important;
    max-height: 70px !important;
    width: auto !important;
    max-width: 150px !important;
    object-fit: contain;
    display: block;
    transition: filter var(--transition-normal);
}

.logo-icon {
    width: 36px;
    height: 36px;
    stroke: var(--color-primary);
    filter: drop-shadow(0 0 8px rgba(0, 212, 255, 0.5));
}

/* ============================================
   Header Navigation
   ============================================ */
.header-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--color-primary);
    background-color: var(--bg-hover);
}

.nav-link.active {
    color: var(--color-primary);
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--color-primary);
    border-radius: 1px;
    box-shadow: var(--glow-primary);
}

/* User Menu */
.user-menu {
    position: relative;
}

.user-menu-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-primary);
}

.user-menu-btn:hover {
    border-color: var(--color-primary);
    background-color: var(--bg-hover);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--text-inverse);
}

.user-name {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
}

.user-menu-btn .chevron {
    width: 16px;
    height: 16px;
    color: var(--text-muted);
    transition: transform var(--transition-fast);
}

.user-menu.active .chevron {
    transform: rotate(180deg);
}

.user-dropdown {
    position: absolute;
    top: calc(100% + var(--spacing-sm));
    right: 0;
    min-width: 200px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: 200;
}

.user-menu.active .user-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.dropdown-header strong {
    font-size: var(--font-size-sm);
    color: var(--text-primary);
}

.user-role {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.dropdown-divider {
    height: 1px;
    background-color: var(--border-color);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
}

.dropdown-item:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.dropdown-item svg {
    width: 18px;
    height: 18px;
}

.dropdown-item.logout:hover {
    background-color: rgba(255, 51, 102, 0.1);
    color: var(--color-danger);
}

/* ============================================
   Search & Filters
   ============================================ */
.filters-section {
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-tertiary) 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    position: relative;
    overflow: hidden;
}

.filters-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
}

.filters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.search-box {
    grid-column: 1 / -1;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-control {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.15), var(--glow-primary);
}

.form-control:disabled {
    background-color: var(--bg-tertiary);
    cursor: not-allowed;
    opacity: 0.6;
}

/* Select Styling */
select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2300d4ff'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    padding-right: 40px;
}

select.form-control option {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

/* Arena Select with Logo */
.arena-select-wrapper {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.arena-select-wrapper select {
    flex: 1;
}

.arena-logo {
    width: 36px;
    height: 36px;
    border-radius: var(--border-radius);
    object-fit: cover;
    border: 1px solid var(--border-color);
    background-color: var(--bg-tertiary);
}

.arena-logo.hidden {
    display: none;
}

.search-input {
    padding-left: 2.75rem;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2300d4ff'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M21 21l-6-6m2-5a7 7 0 11-14 0 7 7 0 0114 0z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: 0.875rem center;
    background-size: 1.25rem;
}

.filters-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-sm);
    font-weight: 600;
    font-family: var(--font-family);
    border: 1px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left var(--transition-slow);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--text-inverse);
    border-color: var(--color-primary);
    box-shadow: var(--glow-primary);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
    box-shadow: var(--glow-primary-strong);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--color-primary);
}

.btn-danger {
    background: linear-gradient(135deg, var(--color-danger) 0%, #cc2952 100%);
    color: var(--text-primary);
    border-color: var(--color-danger);
    box-shadow: var(--glow-danger);
}

.btn-danger:hover {
    box-shadow: 0 0 30px rgba(255, 51, 102, 0.5);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: var(--text-inverse);
    box-shadow: var(--glow-primary);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* ============================================
   Video Grid
   ============================================ */
.videos-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.videos-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.videos-title::before {
    content: '';
    width: 4px;
    height: 24px;
    background: linear-gradient(180deg, var(--color-primary), var(--color-secondary));
    border-radius: 2px;
}

.videos-count {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: var(--spacing-lg);
}

/* ============================================
   Video Card
   ============================================ */
.video-card {
    background: linear-gradient(145deg, var(--bg-card) 0%, var(--bg-tertiary) 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
    position: relative;
}

.video-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.video-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-xl), var(--glow-primary);
}

.video-card:hover::before {
    opacity: 1;
}

.video-thumbnail {
    position: relative;
    aspect-ratio: 16 / 9;
    background-color: var(--bg-primary);
    cursor: pointer;
    overflow: hidden;
}

.video-thumbnail video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.video-card:hover .video-thumbnail video {
    transform: scale(1.05);
}

.video-play-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.4) 0%, rgba(0, 212, 255, 0.1) 100%);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.video-thumbnail:hover .video-play-overlay {
    opacity: 1;
}

.play-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--glow-primary-strong);
    transition: transform var(--transition-fast);
}

.play-icon:hover {
    transform: scale(1.1);
}

.play-icon svg {
    width: 28px;
    height: 28px;
    fill: white;
    margin-left: 4px;
}

.video-info {
    padding: var(--spacing-md);
}

.video-type {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: var(--text-inverse);
    border-radius: 4px;
    margin-bottom: var(--spacing-sm);
}

.video-location {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.video-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* ============================================
   Video Modal
   ============================================ */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--spacing-lg);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    max-width: 1200px;
    width: 100%;
    background: linear-gradient(145deg, var(--bg-card) 0%, var(--bg-secondary) 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    transform: scale(0.9) translateY(20px);
    transition: transform var(--transition-normal);
    box-shadow: var(--shadow-xl), var(--glow-primary);
}

.modal-overlay.active .modal-content {
    transform: scale(1) translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-tertiary);
}

.modal-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    width: 36px;
    height: 36px;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
    color: var(--text-secondary);
}

.modal-close:hover {
    background-color: var(--color-danger);
    border-color: var(--color-danger);
    color: white;
    box-shadow: var(--glow-danger);
}

.modal-body {
    padding: 0;
}

.modal-video {
    width: 100%;
    aspect-ratio: 16 / 9;
    background-color: black;
}

.modal-footer {
    padding: var(--spacing-lg);
    background-color: var(--bg-tertiary);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.modal-info-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.modal-info-label {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-family: var(--font-mono);
}

.modal-info-value {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-primary);
}

/* ============================================
   Pagination
   ============================================ */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-2xl);
}

.pagination-btn {
    min-width: 44px;
    height: 44px;
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    background-color: var(--bg-card);
    color: var(--text-secondary);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-mono);
    font-weight: 600;
}

.pagination-btn:hover:not(:disabled) {
    border-color: var(--color-primary);
    color: var(--color-primary);
    box-shadow: var(--glow-primary);
}

.pagination-btn.active {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-color: var(--color-primary);
    color: var(--text-inverse);
    box-shadow: var(--glow-primary);
}

.pagination-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.pagination-info {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin: 0 var(--spacing-md);
    font-family: var(--font-mono);
}

/* ============================================
   Loading & Empty States
   ============================================ */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(10, 10, 15, 0.95);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 999;
    gap: var(--spacing-lg);
}

.loading-spinner {
    width: 56px;
    height: 56px;
    border: 3px solid var(--border-color);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    box-shadow: var(--glow-primary);
}

.loading-text {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.2em;
    font-family: var(--font-mono);
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-secondary);
}

.empty-state-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto var(--spacing-lg);
    opacity: 0.3;
    stroke: var(--color-primary);
}

.empty-state-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.empty-state-text {
    font-size: var(--font-size-base);
    color: var(--text-muted);
}

/* ============================================
   Notifications
   ============================================ */
.notification {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transform: translateX(120%);
    opacity: 0;
    transition: all var(--transition-normal);
    z-index: 1001;
}

.notification.show {
    transform: translateX(0);
    opacity: 1;
}

.notification.success {
    border-color: var(--color-success);
    box-shadow: var(--glow-success);
}

.notification.success::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--color-success);
    border-radius: var(--border-radius) 0 0 var(--border-radius);
}

.notification.error {
    border-color: var(--color-danger);
    box-shadow: var(--glow-danger);
}

.notification.error::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--color-danger);
    border-radius: var(--border-radius) 0 0 var(--border-radius);
}

.notification-close {
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

.notification-close:hover {
    color: var(--text-primary);
}

/* ============================================
   Stats Cards (Dashboard)
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: linear-gradient(145deg, var(--bg-card) 0%, var(--bg-tertiary) 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg), var(--glow-primary);
}

.stat-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-primary);
    font-family: var(--font-mono);
    text-shadow: var(--glow-primary);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
    .filters-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .videos-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .header-content {
        flex-wrap: wrap;
        justify-content: space-between;
    }

    .header-nav {
        gap: var(--spacing-sm);
    }

    .nav-link {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-xs);
    }

    .user-name {
        display: none;
    }

    .user-menu-btn {
        padding: var(--spacing-xs);
    }

    .filters-section {
        padding: var(--spacing-md);
    }

    .filters-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }

    .search-box {
        grid-column: 1 / -1;
    }

    .videos-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .modal-overlay {
        padding: var(--spacing-sm);
    }

    .modal-content {
        margin: 0;
        max-height: 95vh;
        overflow-y: auto;
        border-radius: var(--border-radius-lg);
    }

    .modal-footer {
        grid-template-columns: 1fr 1fr;
        padding: var(--spacing-md);
    }

    .pagination {
        flex-wrap: wrap;
        gap: var(--spacing-xs);
    }

    .pagination-btn {
        min-width: 40px;
        height: 40px;
    }

    .pagination-info {
        width: 100%;
        text-align: center;
        order: -1;
        margin: 0 0 var(--spacing-sm) 0;
    }

    .videos-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .main-content {
        padding: var(--spacing-md) 0;
    }
}

@media (max-width: 576px) {
    .filters-grid {
        grid-template-columns: 1fr;
    }

    .filters-actions {
        flex-direction: column;
    }

    .filters-actions .btn {
        width: 100%;
    }

    .modal-header {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .modal-title {
        font-size: var(--font-size-base);
    }

    .modal-body {
        padding: 0;
    }

    .modal-footer {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: var(--font-size-base);
    }

    .logo-icon {
        width: 28px;
        height: 28px;
    }

    .logo-img {
        height: 32px;
    }

    .btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-xs);
    }

    .videos-title {
        font-size: var(--font-size-lg);
    }

    .videos-title::before {
        width: 3px;
        height: 18px;
    }

    .video-card {
        border-radius: var(--border-radius);
    }

    .video-info {
        padding: var(--spacing-sm);
    }

    .play-icon {
        width: 56px;
        height: 56px;
    }

    .play-icon svg {
        width: 22px;
        height: 22px;
    }
}

/* ============================================
   Utilities
   ============================================ */
.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

.text-center {
    text-align: center;
}

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

.text-glow {
    text-shadow: var(--glow-primary);
}

.mt-1 { margin-top: var(--spacing-md); }
.mt-2 { margin-top: var(--spacing-lg); }
.mb-1 { margin-bottom: var(--spacing-md); }
.mb-2 { margin-bottom: var(--spacing-lg); }

/* ============================================
   Glow Effects
   ============================================ */
.glow-border {
    position: relative;
}

.glow-border::after {
    content: '';
    position: absolute;
    top: -1px;
    left: -1px;
    right: -1px;
    bottom: -1px;
    border-radius: inherit;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    z-index: -1;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.glow-border:hover::after {
    opacity: 0.5;
    filter: blur(8px);
}