/**
 * Video Tutorial Platform - Main Stylesheet
 */

:root {
    /* Color Variables */
    --primary-color: #1a73e8;
    --primary-dark: #0d47a1;
    --primary-light: #4285f4;
    --secondary-color: #34a853;
    --accent-color: #ea4335;
    --warning-color: #fbbc05;
    --dark-color: #202124;
    --light-color: #f8f9fa;
    --gray-100: #f1f3f4;
    --gray-200: #e8eaed;
    --gray-300: #dadce0;
    --gray-400: #bdc1c6;
    --gray-500: #9aa0a6;
    --gray-600: #80868b;
    --gray-700: #5f6368;
    --gray-800: #3c4043;
    --gray-900: #142d79;
    
    /* Spacing Variables */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 20px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    
    /* Transition Variables */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    
    /* Box Shadow */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1), 0 1px 3px rgba(0,0,0,0.08);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1), 0 2px 10px rgba(0,0,0,0.04);
}

/* Global Styles */
body {
    font-family: 'Roboto', 'Segoe UI', Arial, sans-serif;
    color: var(--gray-900);
    background-color: var(--light-color);
    line-height: 1.5;
    overflow-x: hidden;
}

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background-color: var(--light-color);
}

.content-container {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Navbar Styles */
.navbar {
    background-color: var(--primary-color);
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: white;
}

.navbar-brand i {
    color: white;
}

.nav-link {
    color: rgba(255, 255, 255, 0.9) !important;
    font-weight: 500;
    transition: var(--transition-fast);
}

.nav-link:hover {
    color: white !important;
}

.navbar-toggler {
    border: none;
    padding: var(--spacing-sm);
}

.dropdown-menu {
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-300);
    overflow: hidden;
}

.dropdown-item {
    padding: var(--spacing-sm) var(--spacing-md);
    transition: var(--transition-fast);
}

.dropdown-item:hover {
    background-color: var(--gray-100);
}

/* Sidebar Styles */
.sidebar {
    background-color: white;
    border-right: 1px solid var(--gray-300);
    height: calc(100vh - 56px);
    position: sticky;
    top: 56px;
    overflow-y: auto;
    z-index: 100;
    transition: transform var(--transition-normal);
}

.sidebar-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--gray-300);
    background-color: var(--gray-100);
}

.sidebar-header h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--primary-color);
}

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

.video-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.video-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    text-decoration: none;
    color: var(--gray-900);
    border-left: 3px solid transparent;
    transition: var(--transition-fast);
}

.video-item:hover {
    background-color: var(--gray-100);
}

.video-item.active {
    background-color: var(--gray-200);
    border-left-color: var(--primary-color);
}

.video-thumbnail {
    position: relative;
    width: 120px;
    height: 85px;
    margin-right: var(--spacing-md);
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    flex-shrink: 0;
}

.video-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.playing-indicator {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
}

.playing-indicator i {
    color: white;
    font-size: 1.5rem;
}

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

.video-info h5 {
    margin: 0 0 var(--spacing-xs);
    font-size: 0.9rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.video-duration {
    font-size: 0.8rem;
    color: black;
}

/* Main Content Area */
.main-content {
    padding: var(--spacing-lg);
    background-color: var(--light-color);
}

.video-container {
    background-color: white;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.current-video-info {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--gray-300);
}

.current-video-info h2 {
    margin: 0 0 var(--spacing-sm);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
}

.video-metadata {
    display: flex;
    gap: var(--spacing-lg);
    font-size: 0.9rem;
    color: var(--gray-600);
}

.video-player-wrapper {
    position: relative;
    /* padding-top: 56.25%;  */
     /* 16:9 Aspect Ratio */
    background-color: black;
}

.video-player-wrapper video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    outline: none;
}

.video-js {
    width: 100%;
    height: 100%;
}

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

.video-description h4 {
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    color: var(--gray-800);
}

.video-description p {
    color: var(--gray-700);
    line-height: 1.6;
}

/* Login Page Styles */
.login-card {
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: none;
}

.login-card .card-body {
    padding: var(--spacing-xl);
}

.login-card .card-title {
    color: var(--primary-color);
    font-weight: 700;
}

.form-label {
    font-weight: 500;
    color: var(--gray-700);
}

.input-group-text {
    background-color: var(--gray-100);
    border-color: var(--gray-300);
    color: var(--gray-600);
}

.form-control {
    border-color: var(--gray-300);
    transition: var(--transition-fast);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(26, 115, 232, 0.25);
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    transition: var(--transition-fast);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
}

/* Footer Styles */
.app-footer {
    background-color: var(--gray-900);
    color: white;
    padding: var(--spacing-lg);
    margin-top: auto;
}

.app-footer p {
    margin: 0;
    font-size: 0.9rem;
}

/* Responsive Adjustments */
@media (max-width: 767.98px) {
    .sidebar {
        position: fixed;
        top: 56px;
        left: 0;
        width: 100%;
        height: calc(100vh - 56px);
        transform: translateX(-100%);
        z-index: 1000;
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .main-content {
        padding: var(--spacing-md);
    }
    
    .current-video-info {
        padding: var(--spacing-md);
    }
    
    .video-description {
        padding: var(--spacing-md);
    }
    
    .login-card .card-body {
        padding: var(--spacing-lg);
    }
}

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

.fade-in {
    animation: fadeIn var(--transition-normal);
}

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

.slide-in {
    animation: slideIn var(--transition-normal);
}

/* Video.js Custom Styling */
.video-js .vjs-big-play-button {
    background-color: rgba(26, 115, 232, 0.8);
    border-color: white;
}

.video-js:hover .vjs-big-play-button,
.video-js .vjs-big-play-button:focus {
    background-color: var(--primary-color);
}

.vjs-progress-control .vjs-progress-holder .vjs-play-progress {
    background-color: var(--primary-color);
}

.vjs-control-bar {
    background-color: rgba(0, 0, 0, 0.7);
}