/* CSS Variables */
:root {
    --primary-color: #ff0000;
    --secondary-color: #282828;
    --accent-color: #ff4444;
    --background-dark: #0f0f0f;
    --background-light: #181818;
    --text-primary: #ffffff;
    --text-secondary: #aaaaaa;
    --border-color: #333333;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --transition-fast: 0.2s ease;
    --transition-medium: 0.4s ease;
    --transition-slow: 0.6s ease;
}

/* Light Theme */
[data-theme="light"] {
    --background-dark: #ffffff;
    --background-light: #f8f9fa;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --border-color: #dee2e6;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Cairo', sans-serif;
    background: var(--background-dark);
    color: var(--text-primary);
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../images/background-gradient.png') center/cover;
    opacity: 0.1;
    z-index: -1;
    pointer-events: none;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

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

.loading-content {
    text-align: center;
    color: white;
    position: relative;
    z-index: 2;
}

.loading-logo {
    font-size: 4rem;
    margin-bottom: 1rem;
    animation: pulse 2s infinite;
}

.loading-text {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease;
}

.loading-spinner {
    display: flex;
    justify-content: center;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.particles-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="2" fill="rgba(255,255,255,0.3)"><animate attributeName="opacity" values="0;1;0" dur="3s" repeatCount="indefinite"/></circle><circle cx="80" cy="40" r="1.5" fill="rgba(255,255,255,0.2)"><animate attributeName="opacity" values="0;1;0" dur="2s" repeatCount="indefinite" begin="1s"/></circle><circle cx="40" cy="80" r="1" fill="rgba(255,255,255,0.4)"><animate attributeName="opacity" values="0;1;0" dur="4s" repeatCount="indefinite" begin="2s"/></circle></svg>') repeat;
    animation: float 20s linear infinite;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(15, 15, 15, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: transform var(--transition-medium);
}

.header.hidden {
    transform: translateY(-100%);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

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

.header-controls {
    display: flex;
    gap: 0.5rem;
}

.control-btn {
    background: var(--background-light);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.75rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.control-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: var(--gradient-primary);
    border-radius: 50%;
    transition: all var(--transition-medium);
    transform: translate(-50%, -50%);
    z-index: -1;
}

.control-btn:hover::before {
    width: 100%;
    height: 100%;
}

.control-btn:hover {
    color: white;
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--shadow-color);
}

/* Main Content */
.main-content {
    margin-top: 80px;
    padding: 2rem;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

/* Control Panel */
.control-panel {
    background: var(--background-light);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px var(--shadow-color);
}

.panel-section {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.action-btn {
    background: var(--background-dark);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

.action-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    transition: left var(--transition-medium);
    z-index: -1;
}

.action-btn:hover::before {
    left: 0;
}

.action-btn:hover {
    color: white;
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--shadow-color);
}

.action-btn.primary {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
}

.action-btn.secondary {
    background: var(--gradient-secondary);
    color: white;
    border-color: transparent;
}

.action-btn.edit {
    background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
    color: #333;
    border-color: transparent;
}

/* Video Grid */
.video-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.video-container {
    position: relative;
    background: var(--background-light);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 32px var(--shadow-color);
    transition: all var(--transition-medium);
    border: 1px solid var(--border-color);
}

.video-container:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 20px 40px var(--shadow-color);
}

.video-container.theater-mode {
    grid-column: 1 / -1;
    grid-row: 1 / -1;
    z-index: 100;
}

.video-wrapper {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
    border-radius: 12px;
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    opacity: 0;
    transition: opacity var(--transition-fast);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 1rem;
    border-radius: 12px;
}

.video-container:hover .video-overlay {
    opacity: 1;
}

.video-controls {
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
}

.video-btn {
    background: rgba(0, 0, 0, 0.7);
    border: none;
    color: white;
    padding: 0.5rem;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
    backdrop-filter: blur(10px);
}

.video-btn:hover {
    background: var(--primary-color);
    transform: scale(1.1);
}

.video-info {
    align-self: flex-start;
}

.video-title {
    background: rgba(0, 0, 0, 0.7);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 500;
    backdrop-filter: blur(10px);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 2000;
    backdrop-filter: blur(5px);
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn var(--transition-medium);
}

.modal-content {
    background: var(--background-light);
    border-radius: 12px;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px var(--shadow-color);
    border: 1px solid var(--border-color);
    animation: slideInUp var(--transition-medium);
}

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

.modal-header h2 {
    margin: 0;
    color: var(--text-primary);
}

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

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

.modal-body {
    padding: 1.5rem;
}

.input-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
}

.input-group input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--background-dark);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 0, 0, 0.1);
}

.preview-btn {
    position: absolute;
    right: 8px;
    top: 32px;
    background: var(--primary-color);
    border: none;
    color: white;
    padding: 0.5rem;
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.modal-footer {
    display: flex;
    gap: 0.5rem;
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    justify-content: flex-end;
}

.setting-group {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
    padding: 0.75rem;
    background: var(--background-dark);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.setting-group label {
    color: var(--text-primary);
    font-weight: 500;
}

.setting-group select,
.setting-group input[type="checkbox"] {
    background: var(--background-light);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem;
    border-radius: 4px;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 100px;
    right: 20px;
    z-index: 3000;
}

.toast {
    background: var(--background-light);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem 1.5rem;
    margin-bottom: 0.5rem;
    box-shadow: 0 8px 32px var(--shadow-color);
    animation: slideInRight var(--transition-medium);
    backdrop-filter: blur(10px);
}

.toast.success {
    border-left: 4px solid #28a745;
}

.toast.error {
    border-left: 4px solid #dc3545;
}

.toast.info {
    border-left: 4px solid #17a2b8;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes float {
    from { transform: translateY(0px); }
    to { transform: translateY(-20px); }
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-content {
        padding: 1rem;
        margin-top: 70px;
    }
    
    .video-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .control-panel {
        padding: 1rem;
    }
    
    .panel-section {
        justify-content: center;
        width: 100%;
    }
    
    .action-btn {
        flex: 1;
        justify-content: center;
        min-width: 120px;
    }
    
    .header-content {
        padding: 0.75rem 1rem;
    }
    
    .logo {
        font-size: 1.2rem;
    }
    
    .modal-content {
        width: 95%;
        margin: 1rem;
    }
}

@media (max-width: 480px) {
    .control-panel {
        flex-direction: column;
    }
    
    .panel-section {
        flex-direction: column;
        width: 100%;
    }
    
    .action-btn {
        width: 100%;
    }
    
    .modal-footer {
        flex-direction: column;
    }
    
    .modal-footer .action-btn {
        width: 100%;
    }
}

/* Dark/Light Theme Toggle */
.theme-transition {
    transition: background-color var(--transition-medium), 
                color var(--transition-medium),
                border-color var(--transition-medium);
}

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

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Focus Styles for Accessibility */
button:focus,
input:focus,
select:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .header,
    .control-panel,
    .video-overlay,
    .modal {
        display: none !important;
    }
    
    .video-grid {
        display: block;
    }
    
    .video-container {
        page-break-inside: avoid;
        margin-bottom: 1rem;
    }
}