/* StreamHub Pro - Modern Streaming Platform Styles */

/* CSS Variables for Dark Theme */
:root {
    /* Dark Theme Colors */
    --color-bg-primary: #000000;
    --color-bg-secondary: #1a1a1a;
    --color-bg-tertiary: #2a2a2a;
    --color-bg-glass: rgba(255, 255, 255, 0.05);
    
    /* Text Colors */
    --color-text-primary: #ffffff;
    --color-text-secondary: #b3b3b3;
    --color-text-muted: #666666;
    
    /* Accent Colors */
    --color-accent-primary: #6366f1;
    --color-accent-secondary: #8b5cf6;
    --color-accent-hover: #5855f0;
    
    /* Neon Effects */
    --color-neon-blue: #00d4ff;
    --color-neon-purple: #8b5cf6;
    --color-neon-pink: #ff006e;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.4);
    --shadow-neon: 0 0 20px rgba(99, 102, 241, 0.3);
    
    /* Layout */
    --header-height: 70px;
    --sidebar-width: 280px;
    
    /* Animations */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    overflow-x: hidden;
    line-height: 1.6;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-content {
    text-align: center;
    z-index: 2;
}

.loading-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
    color: var(--color-accent-primary);
}

.loading-logo i {
    font-size: 3rem;
    animation: pulse 2s infinite;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 3px solid var(--color-bg-tertiary);
    border-top: 3px solid var(--color-accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-lg);
}

.loading-screen p {
    color: var(--color-text-secondary);
    font-size: 1.1rem;
}

/* Particles Background */
.particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
}

.particle {
    position: absolute;
    background: var(--color-accent-primary);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
    opacity: 0.1;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(26, 26, 26, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-bg-tertiary);
    z-index: 1000;
    transition: background var(--transition-normal);
}

.header__content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.header__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent-primary);
    text-decoration: none;
}

.header__logo i {
    font-size: 2rem;
    animation: pulse 3s infinite;
}

.header__search {
    flex: 1;
    max-width: 500px;
    margin: 0 var(--spacing-xl);
}

.search-box {
    position: relative;
    width: 100%;
}

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

.search-box input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md) var(--spacing-sm) 2.5rem;
    background: var(--color-bg-glass);
    border: 1px solid var(--color-bg-tertiary);
    border-radius: var(--radius-lg);
    color: var(--color-text-primary);
    font-size: 0.95rem;
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
}

.search-box input:focus {
    outline: none;
    border-color: var(--color-accent-primary);
    box-shadow: var(--shadow-neon);
    background: var(--color-bg-secondary);
}

.search-box input::placeholder {
    color: var(--color-text-muted);
}

.header__controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.header__btn {
    width: 45px;
    height: 45px;
    background: var(--color-bg-glass);
    border: 1px solid var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
}

.header__btn:hover {
    background: var(--color-bg-secondary);
    border-color: var(--color-accent-primary);
    color: var(--color-accent-primary);
    transform: translateY(-2px);
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--header-height));
    background: var(--color-bg-secondary);
    border-right: 1px solid var(--color-bg-tertiary);
    transition: transform var(--transition-normal);
    overflow-y: auto;
    z-index: 900;
}

.sidebar.hidden {
    transform: translateX(-100%);
}

.sidebar__content {
    padding: var(--spacing-lg);
}

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

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: left;
    font-size: 0.95rem;
    position: relative;
    overflow: hidden;
}

.nav-item:hover {
    background: var(--color-bg-glass);
    color: var(--color-text-primary);
    transform: translateX(5px);
}

.nav-item--active {
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    color: white;
    box-shadow: var(--shadow-neon);
}

.nav-item--active::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transform: translateX(-100%);
    animation: shimmer 2s infinite;
}

.nav-item i {
    font-size: 1.2rem;
    width: 20px;
    text-align: center;
}

.nav-item span {
    flex: 1;
}

.nav-item__count {
    background: var(--color-bg-tertiary) !important;
    color: var(--color-accent-primary) !important;
    padding: 0.2rem 0.6rem !important;
    border-radius: var(--radius-sm) !important;
    font-size: 0.8rem !important;
    font-weight: 600 !important;
    min-width: auto !important;
}

.nav-item--active .nav-item__count {
    background: rgba(255, 255, 255, 0.2) !important;
    color: white !important;
}

/* Main Content */
.main {
    margin-left: var(--sidebar-width);
    margin-top: var(--header-height);
    min-height: calc(100vh - var(--header-height));
    background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
    transition: margin-left var(--transition-normal);
}

.main.sidebar-hidden {
    margin-left: 0;
}

.main__content {
    padding: var(--spacing-xl);
    max-width: 1400px;
    margin: 0 auto;
}

/* Hero Section */
.hero {
    position: relative;
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.hero__content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.hero__title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(45deg, white, rgba(255, 255, 255, 0.8));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero__subtitle {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 0;
}

.hero__bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 70%, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: float 6s ease-in-out infinite;
}

/* Channels Section */
.channels__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.channels__title {
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin: 0;
}

.channels__stats {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.channels__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

/* Channel Card */
.channel-card {
    background: var(--color-bg-glass);
    border: 1px solid var(--color-bg-tertiary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
    cursor: pointer;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.channel-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg), var(--shadow-neon);
    border-color: var(--color-accent-primary);
}

.channel-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-secondary));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.channel-card:hover::before {
    transform: scaleX(1);
}

.channel-card__thumbnail {
    font-size: 3rem;
    text-align: center;
    margin-bottom: var(--spacing-md);
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
}

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

.channel-card__name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.channel-card__category {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: var(--color-accent-primary);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.channel-card__button {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.channel-card__button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.channel-card__button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--transition-slow);
}

.channel-card__button:hover::before {
    left: 100%;
}

/* Empty State */
.channels__empty {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--color-text-secondary);
}

.channels__empty i {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.channels__empty h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.modal.active {
    display: flex;
}

.modal__backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
}

.modal__content {
    position: relative;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 900px;
    max-height: 90vh;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-bg-tertiary);
    animation: modalSlideIn var(--transition-normal);
}

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

.modal__title {
    font-size: 1.3rem;
    font-weight: 600;
    margin: 0;
}

.modal__close {
    width: 40px;
    height: 40px;
    background: var(--color-bg-tertiary);
    border: none;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.modal__body {
    padding: var(--spacing-lg);
}

.video-player {
    background: var(--color-bg-primary);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
    position: relative;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.video-player::before {
    content: '🎬';
    font-size: 4rem;
    opacity: 0.3;
}

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

.channel-category {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: var(--color-accent-primary);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.channel-description {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* Animations */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

@keyframes modalSlideIn {
    0% { 
        opacity: 0; 
        transform: scale(0.9) translateY(50px); 
    }
    100% { 
        opacity: 1; 
        transform: scale(1) translateY(0); 
    }
}

@keyframes particleFloat {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    33% { transform: translateY(-20px) rotate(120deg); }
    66% { transform: translateY(10px) rotate(240deg); }
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --sidebar-width: 0px;
    }
    
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main {
        margin-left: 0;
    }
    
    .header__search {
        display: none;
    }
    
    .hero__title {
        font-size: 2rem;
    }
    
    .hero {
        padding: var(--spacing-lg);
    }
    
    .main__content {
        padding: var(--spacing-md);
    }
    
    .channels__grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: var(--spacing-md);
    }
    
    .modal__content {
        margin: var(--spacing-sm);
        max-height: 95vh;
    }
    
    .video-player {
        height: 300px;
    }
    
    .channels__header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .channels__grid {
        grid-template-columns: 1fr;
    }
    
    .hero__title {
        font-size: 1.5rem;
    }
    
    .hero__subtitle {
        font-size: 1rem;
    }
    
    .header__logo span {
        display: none;
    }
    
    .nav-item span:not(.nav-item__count) {
        font-size: 0.9rem;
    }
}

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

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

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

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

/* Selection Styles */
::selection {
    background: var(--color-accent-primary);
    color: white;
}

/* Focus Styles */
*:focus {
    outline: 2px solid var(--color-accent-primary);
    outline-offset: 2px;
}

/* Utility Classes */
.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.text-gradient {
    background: linear-gradient(45deg, var(--color-accent-primary), var(--color-accent-secondary));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Performance Optimizations */
.channel-card,
.nav-item,
.header__btn,
.modal__content {
    will-change: transform;
}

/* Print Styles */
@media print {
    .header,
    .sidebar,
    .modal {
        display: none !important;
    }
    
    .main {
        margin: 0 !important;
        background: white !important;
        color: black !important;
    }
}