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

:root {
    --bg-primary: #0f0f23;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #16213e;
    --bg-card: #1e1e3a;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --accent-glow: rgba(99, 102, 241, 0.3);
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: #2d2d4a;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--accent);
    color: white;
}

.btn-primary:hover {
    background: var(--accent-hover);
    box-shadow: 0 0 20px var(--accent-glow);
}

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

.btn-icon {
    background: transparent;
    color: var(--text-secondary);
    padding: 0.5rem;
}

.btn-icon:hover {
    color: var(--accent);
    background: var(--bg-tertiary);
}

.btn-block { width: 100%; justify-content: center; }

.btn-sm { padding: 0.4rem 0.8rem; font-size: 0.8rem; }

/* Form */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.7rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent);
}

/* App Container */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* Header */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.8rem 1.5rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.logo i {
    font-size: 1.8rem;
    color: var(--accent);
}

.logo h1 {
    font-size: 1.3rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent), #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header-center {
    flex: 1;
    max-width: 400px;
    margin: 0 2rem;
}

.search-box {
    position: relative;
}

.search-box i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-box input {
    width: 100%;
    padding: 0.6rem 1rem 0.6rem 2.5rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 20px;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.search-box input:focus {
    outline: none;
    border-color: var(--accent);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* User Menu */
.user-menu {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.user-dropdown {
    position: relative;
}

.user-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.8rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    cursor: pointer;
}

.user-btn:hover {
    border-color: var(--accent);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 0.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    min-width: 180px;
    display: none;
    box-shadow: var(--shadow);
    z-index: 200;
}

.user-dropdown:hover .dropdown-menu {
    display: block;
}

.dropdown-menu a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.7rem 1rem;
    color: var(--text-primary);
    text-decoration: none;
    transition: background 0.2s;
}

.dropdown-menu a:hover {
    background: var(--bg-tertiary);
}

/* Main Content */
.main-content {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    padding: 1rem;
    flex-shrink: 0;
}

.sidebar-section {
    margin-bottom: 1.5rem;
}

.sidebar-section h3 {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.channel-mini-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.channel-mini {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem;
    background: var(--bg-tertiary);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.channel-mini:hover {
    background: var(--accent);
    transform: translateX(4px);
}

.channel-mini img {
    width: 32px;
    height: 32px;
    border-radius: 4px;
    object-fit: cover;
}

.channel-mini-icon {
    width: 32px;
    height: 32px;
    background: var(--bg-primary);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    font-size: 0.8rem;
}

.channel-mini-info {
    flex: 1;
    min-width: 0;
}

.channel-mini-name {
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.channel-mini-views {
    font-size: 0.7rem;
    color: var(--text-muted);
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.tag {
    padding: 0.3rem 0.6rem;
    background: var(--bg-tertiary);
    border-radius: 15px;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
}

.tag:hover, .tag.active {
    background: var(--accent);
    color: white;
}

/* Content Area */
.content-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Categories Bar */
.categories-bar {
    display: flex;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    overflow-x: auto;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.category-btn {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    border: none;
    border-radius: 20px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s;
}

.category-btn:hover {
    background: var(--accent);
    color: white;
}

.category-btn.active {
    background: var(--accent);
    color: white;
    box-shadow: 0 0 15px var(--accent-glow);
}

/* Channels Grid */
.channels-grid {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    align-content: start;
}

.channel-card {
    background: var(--bg-card);
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s;
    border: 1px solid transparent;
}

.channel-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: 0 8px 30px var(--accent-glow);
}

.channel-card.active {
    border-color: var(--accent);
    box-shadow: 0 0 20px var(--accent-glow);
}

.channel-card.premium::after {
    content: 'PREMIUM';
    position: absolute;
    top: 8px;
    right: 8px;
    padding: 0.2rem 0.5rem;
    background: linear-gradient(135deg, #f59e0b, #ef4444);
    border-radius: 4px;
    font-size: 0.6rem;
    font-weight: 700;
    color: white;
}

.channel-card-header {
    position: relative;
    height: 120px;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.channel-card-header img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.channel-card-icon {
    font-size: 3rem;
    color: var(--accent);
    opacity: 0.5;
}

.channel-card-body {
    padding: 1rem;
}

.channel-card-name {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.channel-card-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.channel-card-meta i {
    color: var(--accent);
}

.channel-card-live {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    color: var(--danger);
    font-size: 0.7rem;
    font-weight: 600;
}

.channel-card-live::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--danger);
    border-radius: 50%;
    animation: pulse 1.5s infinite;
}

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

/* Player Panel */
.player-panel {
    width: 400px;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.player-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--border);
}

.player-info h3 {
    font-size: 1rem;
    font-weight: 600;
}

.player-info p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.player-actions {
    display: flex;
    gap: 0.3rem;
}

.player-container {
    flex: 1;
    position: relative;
    background: #000;
}

#videoPlayer {
    width: 100%;
    height: 100%;
}

.player-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.8);
    color: var(--text-muted);
}

.player-overlay i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.3;
}

.player-overlay.hidden {
    display: none;
}

/* Loading */
.loading {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem;
    color: var(--text-muted);
}

.loading i {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--accent);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: 16px;
    width: 90%;
    max-width: 500px;
    box-shadow: var(--shadow);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 1.5rem;
    border-bottom: 1px solid var(--border);
}

.modal-header h3 {
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.close-btn:hover { color: var(--danger); }

.modal-body {
    padding: 1.5rem;
    max-height: 70vh;
    overflow-y: auto;
}

/* Auth Modal */
.auth-modal {
    padding: 0;
    overflow: hidden;
}

.auth-tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
}

.auth-tab {
    flex: 1;
    padding: 1rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s;
}

.auth-tab:hover { color: var(--text-primary); }

.auth-tab.active {
    color: var(--accent);
    border-bottom: 2px solid var(--accent);
}

.auth-form {
    padding: 1.5rem;
}

.auth-error {
    color: var(--danger);
    font-size: 0.85rem;
    margin-top: 1rem;
    text-align: center;
}

/* Favorites Grid */
.favorites-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
}

.favorite-item {
    position: relative;
    background: var(--bg-tertiary);
    border-radius: 8px;
    padding: 1rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
}

.favorite-item:hover {
    background: var(--accent);
}

.favorite-remove {
    position: absolute;
    top: 4px;
    right: 4px;
    background: var(--danger);
    border: none;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    color: white;
    font-size: 0.7rem;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s;
}

.favorite-item:hover .favorite-remove { opacity: 1; }

/* Responsive */
@media (max-width: 1200px) {
    .player-panel { width: 350px; }
    .sidebar { width: 240px; }
}

@media (max-width: 900px) {
    .main-content { flex-direction: column; }
    .sidebar { display: none; }
    .player-panel {
        width: 100%;
        max-height: 50vh;
        border-left: none;
        border-top: 1px solid var(--border);
    }
    .header-center { display: none; }
    .channels-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        padding: 1rem;
        gap: 0.75rem;
    }
    .channel-card-header { height: 90px; }
    .categories-bar { padding: 0.75rem 1rem; }
}

@media (max-width: 640px) {
    .header { padding: 0.6rem 1rem; }
    .logo h1 { font-size: 1.1rem; }
    .logo i { font-size: 1.4rem; }
    .site-subtitle { display: none; }
    .header-right .btn-primary span { display: none; }
    .user-btn span { display: none; }
    .user-btn { padding: 0.4rem; }
    .channels-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        padding: 0.75rem;
        gap: 0.5rem;
    }
    .channel-card-body { padding: 0.7rem; }
    .channel-card-name { font-size: 0.85rem; }
    .channel-card-meta { font-size: 0.7rem; }
    .channel-card-header { height: 80px; }
    .player-panel { max-height: 45vh; }
    .player-header { padding: 0.7rem; }
    .player-info h3 { font-size: 0.9rem; }
    .player-overlay i { font-size: 2.5rem; }
    .player-overlay p { font-size: 0.8rem; }
    .categories-bar { padding: 0.5rem 0.75rem; gap: 0.4rem; }
    .category-btn { padding: 0.4rem 0.8rem; font-size: 0.8rem; }
    .modal-content { width: 95%; max-width: none; }
    .favorites-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); }
}

@media (max-width: 400px) {
    .header { padding: 0.5rem 0.75rem; }
    .logo h1 { font-size: 1rem; }
    .channels-grid {
        grid-template-columns: repeat(2, 1fr);
        padding: 0.5rem;
        gap: 0.5rem;
    }
    .channel-card-header { height: 70px; }
    .channel-card-body { padding: 0.5rem; }
    .channel-card-name { font-size: 0.8rem; }
    .player-panel { max-height: 40vh; }
}