/* Beautiful Colorful Theme for MyLessonAI */

/* Import beautiful fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    /* Beautiful color palette */
    --primary-color: #667eea;
    --primary-light: #764ba2;
    --secondary-color: #f093fb;
    --success-color: #4facfe;
    --danger-color: #ff6b9d;
    --warning-color: #ffeaa7;
    --info-color: #74b9ff;
    --light-color: #ffffff;
    
    /* Gradient backgrounds */
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --card-gradient: linear-gradient(135deg, #ffffff 0%, #f8f9ff 100%);
    --header-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --button-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --danger-gradient: linear-gradient(135deg, #ff6b9d 0%, #ff8a9b 100%);
    --warning-gradient: linear-gradient(135deg, #ffeaa7 0%, #ffe066 100%);
    
    /* Text colors */
    --text-primary: #2d3748;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --text-light: #ffffff;
    
    /* Border radius */
    --border-radius-sm: 8px;
    --border-radius: 16px;
    --border-radius-lg: 24px;
    --border-radius-xl: 32px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(102, 126, 234, 0.08);
    --shadow: 0 4px 20px rgba(102, 126, 234, 0.15);
    --shadow-lg: 0 8px 32px rgba(102, 126, 234, 0.2);
    --shadow-xl: 0 16px 48px rgba(102, 126, 234, 0.25);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
}

/* Global styles */
* {
    box-sizing: border-box;
}

body {
    background: var(--bg-gradient);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    min-height: 100vh;
    margin: 0;
    padding: 0;
}

/* Container styling */
.container,
.container-fluid {
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
}

/* Navigation styling */
.navbar {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(20px);
    border-radius: 0;
    box-shadow: var(--shadow);
    margin-bottom: var(--spacing-xl);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    background: var(--header-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-link {
    font-weight: 500;
    color: var(--text-primary) !important;
    padding: var(--spacing-sm) var(--spacing-md) !important;
    border-radius: var(--border-radius-sm);
    transition: all 0.3s ease;
}

.nav-link:hover {
    background: var(--bg-gradient);
    color: var(--text-light) !important;
    transform: translateY(-2px);
}

/* Card styling */
.card {
    background: var(--card-gradient);
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
}

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

.card-header {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border-bottom: 2px solid rgba(102, 126, 234, 0.1);
    border-radius: var(--border-radius) var(--border-radius) 0 0 !important;
    padding: var(--spacing-lg);
}

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

.card-footer {
    background: rgba(102, 126, 234, 0.05);
    border-top: 1px solid rgba(102, 126, 234, 0.1);
    border-radius: 0 0 var(--border-radius) var(--border-radius) !important;
    padding: var(--spacing-md) var(--spacing-lg);
}

/* Button styling */
.btn {
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-lg);
    transition: all 0.3s ease;
    border: none;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-primary {
    background: var(--button-gradient);
    color: var(--text-light);
}

.btn-outline-primary {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline-primary:hover {
    background: var(--button-gradient);
    color: var(--text-light);
    border-color: transparent;
}

.btn-success {
    background: var(--success-gradient);
    color: var(--text-light);
}

.btn-danger {
    background: var(--danger-gradient);
    color: var(--text-light);
}

.btn-warning {
    background: var(--warning-gradient);
    color: var(--text-primary);
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.1rem;
    border-radius: var(--border-radius);
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.875rem;
    border-radius: var(--border-radius-sm);
}

/* Form styling */
.form-control,
.form-select {
    border: 2px solid rgba(102, 126, 234, 0.2);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-md);
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.9);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
    outline: none;
    background: var(--light-color);
}

.form-label {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

/* Alert styling */
.alert {
    border: none;
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid;
}

.alert-success {
    background: linear-gradient(135deg, rgba(79, 172, 254, 0.1) 0%, rgba(0, 242, 254, 0.1) 100%);
    border-left-color: var(--success-color);
    color: var(--text-primary);
}

.alert-danger {
    background: linear-gradient(135deg, rgba(255, 107, 157, 0.1) 0%, rgba(255, 138, 155, 0.1) 100%);
    border-left-color: var(--danger-color);
    color: var(--text-primary);
}

.alert-warning {
    background: linear-gradient(135deg, rgba(255, 234, 167, 0.2) 0%, rgba(255, 224, 102, 0.2) 100%);
    border-left-color: var(--warning-color);
    color: var(--text-primary);
}

.alert-info {
    background: linear-gradient(135deg, rgba(116, 185, 255, 0.1) 0%, rgba(116, 185, 255, 0.1) 100%);
    border-left-color: var(--info-color);
    color: var(--text-primary);
}

/* Badge styling */
.badge {
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-weight: 600;
    font-size: 0.75rem;
}

.badge-primary {
    background: var(--button-gradient);
}

.badge-success {
    background: var(--success-gradient);
}

.badge-danger {
    background: var(--danger-gradient);
}

.badge-warning {
    background: var(--warning-gradient);
    color: var(--text-primary);
}

/* Progress bar styling */
.progress {
    height: 12px;
    border-radius: var(--border-radius-sm);
    background: rgba(102, 126, 234, 0.1);
    overflow: hidden;
}

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

/* Modal styling */
.modal-content {
    border: none;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.modal-header {
    background: var(--card-gradient);
    border-bottom: 2px solid rgba(102, 126, 234, 0.1);
    padding: var(--spacing-lg);
}

.modal-body {
    padding: var(--spacing-lg);
}

.modal-footer {
    background: rgba(102, 126, 234, 0.05);
    border-top: 1px solid rgba(102, 126, 234, 0.1);
    padding: var(--spacing-lg);
}

/* Dropdown styling */
.dropdown-menu {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-sm);
    background: var(--card-gradient);
}

.dropdown-item {
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    transition: all 0.3s ease;
    margin-bottom: var(--spacing-xs);
}

.dropdown-item:hover {
    background: var(--bg-gradient);
    color: var(--text-light);
    transform: translateX(4px);
}

/* Lesson card specific styling */
.lesson-card .card {
    border-left: 4px solid var(--primary-color);
    background: var(--card-gradient);
}

.lesson-card .card-header {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
}

/* Statistics card styling */
.statistics-card {
    background: var(--card-gradient);
    text-align: center;
    padding: var(--spacing-xl);
}

.statistics-card .display-4 {
    background: var(--header-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

/* Icon styling */
[data-feather] {
    width: 18px;
    height: 18px;
    vertical-align: text-bottom;
}

/* Loading animations */
@keyframes shimmer {
    0% {
        background-position: -200px 0;
    }
    100% {
        background-position: calc(200px + 100%) 0;
    }
}

.loading-shimmer {
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    background-size: 200px 100%;
    animation: shimmer 1.5s infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.pulse {
    animation: pulse 2s infinite;
}

/* Content styling */
.objectives-content,
.misconceptions-content,
.outcomes-content,
.breaking-ice-content,
.teaching-aids-content,
.homework-content,
.intelligences-content {
    white-space: pre-line;
    line-height: 1.6;
    color: var(--text-secondary);
}

/* Footer styling */
footer {
    margin-top: auto;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 0;
    padding: var(--spacing-lg);
    text-align: center;
    color: var(--text-muted);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .container,
    .container-fluid {
        padding-left: var(--spacing-md);
        padding-right: var(--spacing-md);
    }
    
    .card-header .btn-group {
        flex-direction: column;
        width: 100%;
        gap: var(--spacing-sm);
    }
    
    .navbar {
        margin-bottom: var(--spacing-md);
    }
    
    .modal-dialog {
        margin: var(--spacing-md);
    }
}

/* Accessibility improvements */
.btn:focus,
.form-control:focus,
.form-select:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    body {
        background: white !important;
    }
    
    .navbar,
    .btn,
    .modal,
    footer {
        display: none !important;
    }
    
    .card {
        border: 1px solid #000;
        break-inside: avoid;
        margin-bottom: var(--spacing-md);
        box-shadow: none;
    }
}

/* Custom animations */
@keyframes slideInUp {
    from {
        transform: translateY(30px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.slide-in-up {
    animation: slideInUp 0.6s ease;
}

@keyframes fadeInScale {
    from {
        transform: scale(0.95);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.fade-in-scale {
    animation: fadeInScale 0.4s ease;
}

/* Special effects */
.gradient-text {
    background: var(--header-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.glass-effect {
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Enhanced form validation */
.was-validated .form-control:invalid,
.was-validated .form-select:invalid {
    border-color: var(--danger-color);
    box-shadow: 0 0 0 4px rgba(255, 107, 157, 0.1);
}

.was-validated .form-control:valid,
.was-validated .form-select:valid {
    border-color: var(--success-color);
    box-shadow: 0 0 0 4px rgba(79, 172, 254, 0.1);
}

/* Spinning animation for loading states */
.spin {
    animation: spin 1s linear infinite;
}

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

/* Regenerate button styles */
.btn-outline-success:hover {
    background-color: rgba(25, 135, 84, 0.1);
}

.btn-outline-warning:hover {
    background-color: rgba(255, 193, 7, 0.1);
}

.btn-outline-info:hover {
    background-color: rgba(13, 202, 240, 0.1);
}

.btn-outline-primary:hover {
    background-color: rgba(13, 110, 253, 0.1);
}

.btn-outline-secondary:hover {
    background-color: rgba(108, 117, 125, 0.1);
}

.btn-outline-dark:hover {
    background-color: rgba(33, 37, 41, 0.1);
}