/* ============================================
   BARBAMATHS - CUSTOM STYLES
   Professional Educational Design
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Pacifico&display=swap');

:root {
    /* Color Palette - Professional Educational */
    --primary: #1e3a8a;
    /* Navy Blue */
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary: #0891b2;
    /* Teal */
    --secondary-dark: #0e7490;
    --accent: #059669;
    /* Green */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #dc2626;

    /* Neutral Colors */
    --bg-primary: #f8fafc;
    --bg-secondary: #f1f5f9;
    --bg-tertiary: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #64748b;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

/* Subtle Background Pattern */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 50%, rgba(30, 58, 138, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(8, 145, 178, 0.03) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

@media (max-width: 768px) {
  .container {
    padding: 0 1rem;
  }
}

/* Navigation */
nav {
    background: white;
    border-bottom: 2px solid var(--bg-tertiary);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
}

/* Burger Menu Button */
.burger-menu {
    display: none;
    flex-direction: column;
    gap: 0.4rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 101;
}

.burger-menu span {
    width: 28px;
    height: 3px;
    background: var(--primary);
    border-radius: 3px;
    transition: all 0.3s ease;
}

.burger-menu.active span:nth-child(1) {
    transform: rotate(45deg) translateY(10px);
}

.burger-menu.active span:nth-child(2) {
    opacity: 0;
}

.burger-menu.active span:nth-child(3) {
    transform: rotate(-45deg) translateY(-10px);
}

/* Mobile Navigation Overlay */
.nav-mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    z-index: 99;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.nav-mobile-overlay.active {
    display: block;
    opacity: 1;
}

/* Mobile Menu */
.nav-mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: white;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
    z-index: 100;
    padding: 5rem 2rem 2rem 2rem;
    overflow-y: auto;
    transition: right 0.3s ease;
}

.nav-mobile-menu.active {
    display: block;
    right: 0;
}

.nav-mobile-menu .nav-links {
    flex-direction: column;
    gap: 0;
    width: 100%;
}

.nav-mobile-menu .nav-links a {
    width: 100%;
    padding: 1rem;
    justify-content: flex-start;
    border-bottom: 1px solid var(--bg-tertiary);
}

.nav-mobile-menu .nav-links a:hover {
    background: var(--bg-secondary);
}

.nav-mobile-menu .nav-admin {
    margin-top: 2rem;
    width: 100%;
}

.nav-mobile-menu .nav-admin .btn {
    width: 100%;
    justify-content: center;
}

.logo {
    font-family: 'Pacifico', cursive;
    font-size: 2rem;
    color: var(--primary);
    transition: transform 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
    text-decoration: none;
    cursor: pointer;
}

.logo:hover {
    transform: scale(1.05);
}

.nav-center {
    flex: 1;
    display: flex;
    justify-content: center;
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
    list-style: none;
    margin: 0;
}

.nav-admin {
    display: flex;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-links a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background: var(--primary);
    transform: translateX(-50%);
    transition: width 0.3s ease;
    border-radius: 2px;
}

.nav-links a:hover {
    color: var(--primary);
}

.nav-links a:hover::before {
    width: 80%;
}

/* Active nav link (keep underline on current page) */
.nav-links a.active {
    color: var(--primary);
}

.nav-links a.active::before {
    width: 80%;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-sm {
    padding: 0.45rem 0.85rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    line-height: 1.2;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

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

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-dark) 100%);
    color: white;
    box-shadow: var(--shadow-md);
}

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

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

.btn-outline:hover {
    background: var(--primary);
    color: white;
}

/* Admin Pages - Compact Lists (Courses / Exercises / Agenda) */
:is(.admin-courses-page #courses-list, .admin-exercises-page #exercises-list, .admin-agenda-page #agenda-list) .course-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

:is(.admin-courses-page #courses-list, .admin-exercises-page #exercises-list, .admin-agenda-page #agenda-list) .course-card.card {
    padding: 1rem 1.1rem;
    border-radius: var(--radius-md);
}

:is(.admin-courses-page #courses-list, .admin-exercises-page #exercises-list, .admin-agenda-page #agenda-list) .course-card.card:hover {
    transform: translateY(-2px);
}

:is(.admin-courses-page #courses-list, .admin-exercises-page #exercises-list, .admin-agenda-page #agenda-list) .course-card-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
}

:is(.admin-courses-page #courses-list, .admin-exercises-page #exercises-list, .admin-agenda-page #agenda-list) .course-tags {
    display: flex;
    gap: 0.4rem;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
}

:is(.admin-courses-page #courses-list, .admin-exercises-page #exercises-list, .admin-agenda-page #agenda-list) .course-tag {
    color: white;
    padding: 0.15rem 0.55rem;
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: 0.01em;
}

:is(.admin-courses-page #courses-list, .admin-exercises-page #exercises-list, .admin-agenda-page #agenda-list) .course-tag--primary {
    background: var(--primary);
}

:is(.admin-courses-page #courses-list, .admin-exercises-page #exercises-list, .admin-agenda-page #agenda-list) .course-tag--secondary {
    background: var(--secondary);
}

:is(.admin-courses-page #courses-list, .admin-exercises-page #exercises-list, .admin-agenda-page #agenda-list) .course-title {
    font-weight: 800;
    font-size: 1.1rem;
    line-height: 1.25;
    margin: 0 0 0.35rem 0;
}

:is(.admin-courses-page #courses-list, .admin-exercises-page #exercises-list, .admin-agenda-page #agenda-list) .course-summary {
    margin: 0 0 0.35rem 0;
    font-size: 0.85rem;
    line-height: 1.35;
    color: var(--text-secondary);
}

:is(.admin-courses-page #courses-list, .admin-exercises-page #exercises-list, .admin-agenda-page #agenda-list) .course-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
}

:is(.admin-courses-page #courses-list, .admin-exercises-page #exercises-list, .admin-agenda-page #agenda-list) .course-actions {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    flex-shrink: 0;
}

:is(.admin-courses-page #courses-list, .admin-exercises-page #exercises-list, .admin-agenda-page #agenda-list) .course-actions .btn {
    justify-content: center;
    white-space: nowrap;
    min-width: 8.75rem;
}

@media (max-width: 768px) {
    :is(.admin-courses-page #courses-list, .admin-exercises-page #exercises-list, .admin-agenda-page #agenda-list) .course-card-row {
        flex-direction: column;
        align-items: stretch;
    }

    :is(.admin-courses-page #courses-list, .admin-exercises-page #exercises-list, .admin-agenda-page #agenda-list) .course-actions .btn {
        width: 100%;
        min-width: 0;
    }
}

/* Admin Classes Page - Compact Grid */
.admin-classes-page #classes-list .classes-grid {
    gap: 0.75rem;
}

.admin-classes-page #classes-list .class-card.card {
    padding: 1rem 1.1rem;
    border-radius: var(--radius-md);
}

.admin-classes-page #classes-list .class-card.card:hover {
    transform: translateY(-2px);
}

.admin-classes-page #classes-list .class-title {
    font-weight: 800;
    font-size: 1.1rem;
    line-height: 1.25;
    margin: 0 0 0.35rem 0;
}

.admin-classes-page #classes-list .class-desc {
    margin: 0 0 0.35rem 0;
    font-size: 0.85rem;
    line-height: 1.35;
    color: var(--text-secondary);
}

.admin-classes-page #classes-list .class-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0 0 0.6rem 0;
}

.admin-classes-page #classes-list .class-actions {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.admin-classes-page #classes-list .class-actions .btn {
    justify-content: center;
    width: 100%;
}

/* Public Courses Page - Compact Actions ("Cours disponibles") */
.public-courses-page #courses-content .course-actions {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: flex-end;
    gap: 0.5rem;
    flex-shrink: 0;
    flex-wrap: nowrap;
}

.public-courses-page #courses-content .course-actions .btn {
    white-space: nowrap;
    width: auto;
}

@media (max-width: 768px) {
    .public-courses-page #courses-content .course-actions {
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
}

/* Cards */
.card {
    background: white;
    border: 1px solid var(--bg-tertiary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    border-color: var(--primary);
}

/* Grid Layouts */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* Hero Section */
.hero {
    text-align: center;
    padding: var(--spacing-xl) 0;
    margin-bottom: var(--spacing-xl);
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 900;
    margin-bottom: var(--spacing-md);
    color: var(--primary);
    line-height: 1.2;
    animation: fadeInUp 0.8s ease;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
    animation: fadeInUp 0.8s ease 0.2s backwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Section Titles */
.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    position: relative;
    padding-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: var(--radius-full);
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    background: white;
    border: 2px solid var(--bg-tertiary);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

/* Loading Spinner */
.spinner {
    border: 3px solid var(--bg-tertiary);
    border-top: 3px solid var(--primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 2rem auto;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* Alert Messages */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border-color: var(--success);
    color: var(--success);
}

.alert-error {
    background: rgba(220, 38, 38, 0.1);
    border-color: var(--error);
    color: var(--error);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border-color: var(--warning);
    color: var(--warning);
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    /* Hide desktop navigation on mobile */
    nav .nav-center,
    nav .nav-admin {
        display: none !important;
    }
    
    /* Show burger menu on mobile */
    .burger-menu {
        display: flex !important;
    }
    
    nav .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.text-muted {
    color: var(--text-muted);
}

.text-secondary {
    color: var(--text-secondary);
}

.mt-1 {
    margin-top: var(--spacing-sm);
}

.mt-2 {
    margin-top: var(--spacing-md);
}

.mt-3 {
    margin-top: var(--spacing-lg);
}

.mb-1 {
    margin-bottom: var(--spacing-sm);
}

.mb-2 {
    margin-bottom: var(--spacing-md);
}

.mb-3 {
    margin-bottom: var(--spacing-lg);
}

.hidden {
    display: none;
}