/* Sistema EAD - Estilos Principais */

:root {
    --primary-color: #2563eb;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #06b6d4;
    --light-color: #f8fafc;
    --dark-color: #1e293b;
    --border-radius: 8px;
    --box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --transition: all 0.3s ease;
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--light-color);
    padding-top: 76px; /* Altura da navbar fixa */
}

/* Navbar */
.navbar-brand {
    font-size: 1.5rem;
}

.navbar-nav .nav-link {
    font-weight: 500;
    transition: var(--transition);
}

.navbar-nav .nav-link:hover {
    color: rgba(255, 255, 255, 0.8) !important;
}

/* Main Content */
.main-content {
    min-height: calc(100vh - 200px);
}

/* Cards */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.card:hover {
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    transform: translateY(-2px);
}

.card-header {
    background-color: white;
    border-bottom: 1px solid #e2e8f0;
    font-weight: 600;
}

/* Botões */
.btn {
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background-color: #1d4ed8;
    border-color: #1d4ed8;
    transform: translateY(-1px);
}

.btn-success {
    background-color: var(--success-color);
    border-color: var(--success-color);
}

.btn-danger {
    background-color: var(--danger-color);
    border-color: var(--danger-color);
}

.btn-warning {
    background-color: var(--warning-color);
    border-color: var(--warning-color);
}

.btn-info {
    background-color: var(--info-color);
    border-color: var(--info-color);
}

/* Forms */
.form-control, .form-select {
    border-radius: var(--border-radius);
    border: 1px solid #d1d5db;
    transition: var(--transition);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(37, 99, 235, 0.25);
}

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

/* Tables */
.table {
    background-color: white;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.table thead th {
    background-color: var(--light-color);
    border-bottom: 2px solid #e2e8f0;
    font-weight: 600;
    color: var(--dark-color);
}

.table tbody tr:hover {
    background-color: #f8fafc;
}

/* Badges */
.badge {
    font-weight: 500;
    padding: 0.5em 0.75em;
}

/* Alerts */
.alert {
    border: none;
    border-radius: var(--border-radius);
    border-left: 4px solid;
}

.alert-success {
    background-color: #f0fdf4;
    color: #166534;
    border-left-color: var(--success-color);
}

.alert-danger {
    background-color: #fef2f2;
    color: #991b1b;
    border-left-color: var(--danger-color);
}

.alert-warning {
    background-color: #fffbeb;
    color: #92400e;
    border-left-color: var(--warning-color);
}

.alert-info {
    background-color: #f0f9ff;
    color: #075985;
    border-left-color: var(--info-color);
}

/* Dashboard Stats */
.stats-card {
    background: linear-gradient(135deg, var(--primary-color), #3b82f6);
    color: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
}

.stats-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.stats-card.success {
    background: linear-gradient(135deg, var(--success-color), #34d399);
}

.stats-card.warning {
    background: linear-gradient(135deg, var(--warning-color), #fbbf24);
}

.stats-card.danger {
    background: linear-gradient(135deg, var(--danger-color), #f87171);
}

.stats-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stats-label {
    font-size: 1rem;
    opacity: 0.9;
}

/* Video Player */
.video-container {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    background-color: #000;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.video-container iframe,
.video-container video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* Progress Bar */
.progress {
    height: 8px;
    border-radius: 4px;
    background-color: #e2e8f0;
}

.progress-bar {
    background-color: var(--success-color);
    border-radius: 4px;
    transition: width 0.6s ease;
}

/* Course Cards */
.course-card {
    transition: var(--transition);
    height: 100%;
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.course-image {
    height: 200px;
    object-fit: cover;
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

/* Sidebar */
.sidebar {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
}

.sidebar-item {
    padding: 0.75rem 1rem;
    margin-bottom: 0.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    cursor: pointer;
}

.sidebar-item:hover {
    background-color: var(--light-color);
}

.sidebar-item.active {
    background-color: var(--primary-color);
    color: white;
}

/* Loading Spinner */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

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

/* Responsive */
@media (max-width: 768px) {
    .stats-card {
        margin-bottom: 1rem;
    }
    
    .course-image {
        height: 150px;
    }
    
    .stats-number {
        font-size: 2rem;
    }
}

/* Utilities */
.text-muted {
    color: var(--secondary-color) !important;
}

.bg-light {
    background-color: var(--light-color) !important;
}

.border-radius {
    border-radius: var(--border-radius);
}

.shadow {
    box-shadow: var(--box-shadow);
}

.transition {
    transition: var(--transition);
}

/* Login/Register Pages */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), #3b82f6);
}

.auth-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    padding: 2rem;
    width: 100%;
    max-width: 400px;
}

.auth-logo {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--primary-color);
    font-size: 2rem;
    font-weight: 700;
}

/* File Upload */
.file-upload {
    border: 2px dashed #d1d5db;
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.file-upload:hover {
    border-color: var(--primary-color);
    background-color: #f8fafc;
}

.file-upload.dragover {
    border-color: var(--primary-color);
    background-color: #eff6ff;
}

/* Animations */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

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

.slide-in {
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from { transform: translateX(-100%); }
    to { transform: translateX(0); }
}