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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><polygon fill="%23ffffff" fill-opacity="0.05" points="0,0 1000,300 1000,1000 0,700"/></svg>');
    background-size: cover;
}

.hero-section .container {
    position: relative;
    z-index: 2;
}

.hero-image {
    text-align: center;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

/* Feature Cards */
.feature-card {
    transition: all 0.3s ease;
    border-radius: 15px;
    overflow: hidden;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1) !important;
}

.feature-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

/* Role Cards */
.role-card {
    transition: all 0.3s ease;
    border-radius: 15px;
    overflow: hidden;
}

.role-card:hover {
    transform: scale(1.05);
    box-shadow: 0 20px 40px rgba(0,0,0,0.15) !important;
}

/* Dashboard Styles */
.sidebar {
    background: linear-gradient(180deg, #2c3e50 0%, #34495e 100%);
    min-height: 100vh;
    transition: all 0.3s ease;
}

.sidebar .nav-link {
    color: rgba(255,255,255,0.8);
    padding: 12px 20px;
    margin: 4px 8px;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.sidebar .nav-link:hover,
.sidebar .nav-link.active {
    background: rgba(255,255,255,0.1);
    color: white;
    transform: translateX(5px);
}

.sidebar .nav-link i {
    width: 20px;
    text-align: center;
    margin-right: 8px;
}

/* Main Content */
.main-content {
    background: #f8f9fa;
    min-height: 100vh;
}

.top-navbar {
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 1rem 0;
}

/* Cards */
.stat-card {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    border: none;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.15);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

/* Video Player */
.video-container {
    position: relative;
    background: #000;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.video-player {
    width: 100%;
    height: auto;
    display: block;
}

.video-controls {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    padding: 20px;
    color: white;
}

/* Forms */
.form-control {
    border: 2px solid #e9ecef;
    border-radius: 10px;
    padding: 12px 16px;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

.btn {
    border-radius: 10px;
    padding: 12px 24px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.btn-success {
    background: linear-gradient(135deg, #56ab2f 0%, #a8e6cf 100%);
}

.btn-warning {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.btn-danger {
    background: linear-gradient(135deg, #fc466b 0%, #3f5efb 100%);
}

/* Tables */
.table {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
}

.table th {
    background: #f8f9fa;
    border: none;
    font-weight: 600;
    color: #2c3e50;
    padding: 16px;
}

.table td {
    border: none;
    padding: 16px;
    vertical-align: middle;
}

.table tbody tr {
    transition: all 0.3s ease;
}

.table tbody tr:hover {
    background: #f8f9fa;
    transform: scale(1.01);
}

/* Modals */
.modal-content {
    border: none;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}

.modal-header {
    border-bottom: 1px solid #e9ecef;
    border-radius: 20px 20px 0 0;
}

.modal-footer {
    border-top: 1px solid #e9ecef;
    border-radius: 0 0 20px 20px;
}

/* Progress Bars */
.progress {
    height: 8px;
    border-radius: 10px;
    background: #e9ecef;
}

.progress-bar {
    border-radius: 10px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* Alerts */
.alert {
    border: none;
    border-radius: 15px;
    padding: 16px 20px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

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

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        top: 0;
        left: -100%;
        z-index: 1000;
        transition: all 0.3s ease;
    }
    
    .sidebar.show {
        left: 0;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .hero-section h1 {
        font-size: 2.5rem;
    }
    
    .feature-icon {
        width: 60px;
        height: 60px;
    }
    
    .stat-card {
        margin-bottom: 1rem;
    }
}

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.animate-slide-in-left {
    animation: slideInLeft 0.6s ease-out;
}

/* Upload Area */
.upload-area {
    border: 2px dashed #dee2e6;
    border-radius: 15px;
    padding: 3rem;
    text-align: center;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

.upload-area:hover {
    border-color: #667eea;
    background: rgba(102, 126, 234, 0.05);
}

.upload-area.dragover {
    border-color: #667eea;
    background: rgba(102, 126, 234, 0.1);
    transform: scale(1.02);
}

/* Video Thumbnail */
.video-thumbnail {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.video-thumbnail:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 30px rgba(0,0,0,0.2);
}

.video-thumbnail .play-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0,0,0,0.7);
    color: white;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: all 0.3s ease;
}

.video-thumbnail:hover .play-overlay {
    background: rgba(102, 126, 234, 0.9);
    transform: translate(-50%, -50%) scale(1.1);
}

/* Material Cards */
.material-card {
    transition: all 0.3s ease;
}

.material-card .card {
    transition: all 0.3s ease;
    border: 1px solid rgba(0,0,0,0.1);
}

.material-card:hover .card {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
    border-color: rgba(102, 126, 234, 0.3);
}

.hover-shadow {
    transition: all 0.3s ease;
}

.hover-shadow:hover {
    box-shadow: 0 8px 25px rgba(0,0,0,0.15) !important;
}

/* File Type Icons */
.material-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

/* Upload Modal */
.upload-info {
    background: rgba(102, 126, 234, 0.1);
    border: 1px solid rgba(102, 126, 234, 0.2);
    border-radius: 10px;
    padding: 1rem;
}

.file-input-wrapper {
    position: relative;
    overflow: hidden;
    display: inline-block;
    width: 100%;
}

.file-input-wrapper input[type=file] {
    position: absolute;
    left: -9999px;
}

.file-input-label {
    display: block;
    width: 100%;
    padding: 0.375rem 0.75rem;
    background: #fff;
    border: 1px solid #ced4da;
    border-radius: 0.375rem;
    color: #6c757d;
    cursor: pointer;
    transition: all 0.3s ease;
}

.file-input-label:hover {
    border-color: #667eea;
    color: #667eea;
}

/* Material Statistics */
.stat-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 15px;
    padding: 1.5rem;
    text-align: center;
    border: none !important;
}

.stat-card i {
    opacity: 0.8;
}

.stat-card h3 {
    font-weight: 700;
    margin: 0.5rem 0;
}

/* Material Type Badges */
.type-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.type-badge.pdf {
    background: rgba(220, 53, 69, 0.1);
    color: #dc3545;
}

.type-badge.presentation {
    background: rgba(255, 193, 7, 0.1);
    color: #ffc107;
}

.type-badge.code {
    background: rgba(23, 162, 184, 0.1);
    color: #17a2b8;
}

.type-badge.link {
    background: rgba(40, 167, 69, 0.1);
    color: #28a745;
}

/* Download Button */
.download-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    color: white;
    transition: all 0.3s ease;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
    color: white;
}

/* Filter Section */
.filter-section {
    background: #f8f9fa;
    border-radius: 15px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.filter-section .form-select {
    border-radius: 10px;
    border: 2px solid #e9ecef;
    transition: all 0.3s ease;
}

.filter-section .form-select:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}