/* 
 * Traffic Cop Labs - The LAB LMS
 * Apple-inspired Design System
 */

:root {
    /* Brand Colors */
    --navy-dark: #0f172a;
    --navy-primary: #1e3a8a;
    --blue-accent: #3b82f6;
    --orange-accent: #FF8C00;
    --gray-text: #6B7280;
    --gray-light: #F3F4F6;
    --white: #FFFFFF;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    
    /* Border Radius */
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Global Styles */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    color: #374151;
    background: var(--gray-light);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--navy-dark);
    font-weight: 600;
    letter-spacing: -0.02em;
}

.text-muted {
    color: #6B7280 !important;
}

/* Navbar */
.navbar {
    background: var(--navy-dark) !important;
    box-shadow: var(--shadow-md);
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--white) !important;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.navbar-brand img {
    height: 50px;
    width: auto;
}

.nav-link {
    color: rgba(255, 255, 255, 0.8) !important;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.nav-link:hover {
    color: var(--orange-accent) !important;
}

/* Buttons */
.btn-primary {
    background: var(--orange-accent);
    border: none;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.btn-primary:hover {
    background: #e67e00;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline-primary {
    border: 2px solid var(--orange-accent);
    color: var(--orange-accent);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.btn-outline-primary:hover {
    background: var(--orange-accent);
    color: var(--white);
    transform: translateY(-2px);
}

.btn-success {
    background: #10b981;
    border: none;
    transition: all var(--transition-base);
}

.btn-success:hover {
    background: #059669;
    transform: translateY(-2px);
}

/* Cards */
.card {
    border: none;
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
    background: var(--white);
    box-shadow: var(--shadow-md);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.card-header {
    background: var(--navy-primary) !important;
    border: none;
    padding: 1.25rem 1.5rem;
    font-weight: 600;
}

/* Course Cards */
.course-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition-base);
    height: 100%;
    background: var(--white);
}

.course-card-image {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%;
    background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy-primary) 100%);
    overflow: hidden;
}

.course-card-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-base);
}

.course-card:hover .course-card-image img {
    transform: scale(1.05);
}

.course-card-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(15, 23, 42, 0.95) 0%, rgba(15, 23, 42, 0.6) 60%, transparent 100%);
    padding: 2rem 1.5rem 1rem;
    color: var(--white);
}

.course-card-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--white);
}

.course-card .progress {
    background: rgba(255, 255, 255, 0.3);
}

/* Progress Bars */
.progress {
    height: 8px;
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.1);
}

.progress-bar {
    background: linear-gradient(90deg, var(--orange-accent) 0%, #ffb347 100%);
    border-radius: 10px;
    transition: width var(--transition-base);
}

/* Badges */
.badge {
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-weight: 600;
}

.bg-success {
    background: #10b981 !important;
}

.bg-warning {
    background: var(--orange-accent) !important;
}

/* Alerts */
.alert {
    border: none;
    border-radius: var(--radius-md);
    padding: 1rem 1.5rem;
}

.alert-info {
    background: rgba(59, 130, 246, 0.1);
    color: var(--navy-primary);
    border-left: 4px solid var(--blue-accent);
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    color: #065f46;
    border-left: 4px solid #10b981;
}

/* List Groups */
.list-group-item:hover {
    background: var(--gray-light);
    border-left: 3px solid var(--orange-accent);
}

/* Forms */
.form-control {
    border: 2px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-control:focus {
    border-color: var(--orange-accent);
    box-shadow: 0 0 0 3px rgba(255, 140, 0, 0.1);
}

.form-check-input:checked {
    background-color: var(--orange-accent);
    border-color: var(--orange-accent);
}

/* Video Progress */
#video-progress {
    font-weight: 700;
    color: var(--orange-accent);
    font-size: 1.125rem;
}

/* Responsive */
@media (max-width: 768px) {
    .navbar-brand img {
        height: 40px;
    }
}

/* Smooth Animations */
* {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Additional text contrast fixes */
.card-body {
    color: #374151;
}

.list-group-item {
    color: #374151;
}


.card-header h4, .card-header h5 {
    color: var(--white) !important;
}

/* Footer - Light version */
.footer {
    background: white;
    color: #374151;
    padding: 2rem 0;
    margin-top: 4rem;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.footer h6 {
    color: #0f172a !important;
    font-weight: 600;
}

.footer p, .footer li {
    color: #6B7280;
}

.footer a {
    color: #FF8C00;
    text-decoration: none;
    transition: color 150ms cubic-bezier(0.4, 0, 0.2, 1);
}

.footer a:hover {
    color: #e67e00;
}

/* Lesson Content Styling */
.lesson-content {
    font-size: 1rem;
    line-height: 1.75;
    color: #374151;
}

.lesson-content h1,
.lesson-content h2,
.lesson-content h3,
.lesson-content h4 {
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--navy-dark);
}

.lesson-content p {
    margin-bottom: 1rem;
}

.lesson-content ul,
.lesson-content ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.lesson-content li {
    margin-bottom: 0.5rem;
}

.lesson-content a {
    color: var(--orange-accent);
    text-decoration: none;
}

.lesson-content a:hover {
    text-decoration: underline;
}

.lesson-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin: 1rem 0;
}

.lesson-content strong {
    font-weight: 600;
    color: var(--navy-dark);
}

.lesson-content em {
    font-style: italic;
}

.lesson-content code {
    background-color: var(--gray-light);
    padding: 0.2rem 0.4rem;
    border-radius: 0.25rem;
    font-size: 0.875rem;
    font-family: monospace;
}

.lesson-content pre {
    background-color: var(--gray-light);
    padding: 1rem;
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin: 1rem 0;
}

.lesson-content blockquote {
    border-left: 4px solid var(--orange-accent);
    padding-left: 1rem;
    margin: 1rem 0;
    font-style: italic;
    color: var(--gray-text);
}