/* ========================================
   LMS FORMATION LANGEVIN - DESIGN COMPLET
   Copie exacte de formationlangevin.com
   + Responsive Mobile
   ======================================== */

/* Variables - Couleurs Formation Langevin */
:root {
    --primary-blue: #1A3A52;
    --primary-red: #E30613;
    --red-hover: #B00510;
    --dark-blue: #0F2838;
    --light-gray: #F8F9FA;
    --white: #FFFFFF;
    --text-dark: #1A1A1A;
    --text-gray: #6B7280;
    --border-color: #E5E7EB;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background: var(--white);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
}

/* ========================================
   HEADER / NAVIGATION (Style Formation Langevin)
   ======================================== */

.main-header {
    background: var(--primary-blue);
    color: var(--white);
    padding: 1rem 0;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
    text-decoration: none;
    color: var(--white);
}

.logo img {
    height: 50px;
    width: auto;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

.main-nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.main-nav a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
    padding: 0.5rem 0;
}

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

.btn-menu-mobile {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

@media (max-width: 768px) {
    .main-nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--primary-blue);
        flex-direction: column;
        padding: 2rem;
        gap: 1rem;
        transform: translateX(-100%);
        transition: transform 0.3s;
        box-shadow: var(--shadow-lg);
    }
    
    .main-nav.active {
        transform: translateX(0);
    }
    
    .btn-menu-mobile {
        display: block;
    }
    
    .logo h1 {
        font-size: 1.2rem;
    }
}

/* ========================================
   HERO SECTION (Style Formation Langevin)
   ======================================== */

.hero-section {
    background: var(--primary-blue);
    color: var(--white);
    padding: 5rem 0;
    position: relative;
    overflow: hidden;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero-text h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-text p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-image {
    position: relative;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
}

@media (max-width: 968px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text h1 {
        font-size: 2rem;
    }
    
    .hero-text p {
        font-size: 1.1rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-image {
        max-width: 400px;
        margin: 0 auto;
    }
}

/* ========================================
   BUTTONS (Style Formation Langevin)
   ======================================== */

.btn-primary {
    background: var(--primary-red);
    color: var(--white);
    padding: 1rem 2rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s;
    box-shadow: 0 4px 12px rgba(227, 6, 19, 0.3);
}

.btn-primary:hover {
    background: var(--red-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(227, 6, 19, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    padding: 1rem 2rem;
    border: 2px solid var(--white);
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s;
}

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

.btn-block {
    display: block;
    width: 100%;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

@media (max-width: 768px) {
    .btn-primary,
    .btn-secondary {
        padding: 0.875rem 1.5rem;
        font-size: 0.95rem;
        width: 100%;
        text-align: center;
    }
}

/* ========================================
   CARDS / COURSES
   ======================================== */

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    padding: 3rem 0;
}

.course-card {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    cursor: pointer;
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.course-thumbnail {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: var(--light-gray);
}

.course-content {
    padding: 1.5rem;
}

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

.course-description {
    color: var(--text-gray);
    margin-bottom: 1rem;
    line-height: 1.5;
}

.course-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.course-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-red);
}

@media (max-width: 768px) {
    .courses-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

/* ========================================
   AUTH PAGES (Login/Register)
   ======================================== */

.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark-blue) 100%);
    padding: 2rem;
}

.auth-box {
    background: var(--white);
    border-radius: 16px;
    padding: 3rem;
    max-width: 450px;
    width: 100%;
    box-shadow: var(--shadow-lg);
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-header h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

.auth-header h2 {
    color: var(--primary-blue);
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.auth-header p {
    color: var(--text-gray);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-red);
}

.alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.alert-error {
    background: #FEE2E2;
    color: #991B1B;
    border-left: 4px solid var(--primary-red);
}

.alert-success {
    background: #D1FAE5;
    color: #065F46;
    border-left: 4px solid #10B981;
}

.auth-footer {
    margin-top: 2rem;
    text-align: center;
    color: var(--text-gray);
}

.auth-footer a {
    color: var(--primary-red);
    text-decoration: none;
    font-weight: 600;
}

.auth-footer a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .auth-container {
        padding: 1rem;
    }
    
    .auth-box {
        padding: 2rem 1.5rem;
    }
    
    .auth-header h1 {
        font-size: 2.5rem;
    }
    
    .auth-header h2 {
        font-size: 1.5rem;
    }
}

/* ========================================
   ADMIN DASHBOARD
   ======================================== */

.admin-container {
    display: flex;
    min-height: 100vh;
}

.admin-sidebar {
    width: 260px;
    background: var(--primary-blue);
    color: var(--white);
    padding: 2rem 0;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.admin-sidebar h2 {
    padding: 0 1.5rem;
    margin-bottom: 2rem;
    font-size: 1.5rem;
}

.admin-sidebar nav a {
    display: block;
    padding: 1rem 1.5rem;
    color: var(--white);
    text-decoration: none;
    transition: background 0.3s;
    border-left: 4px solid transparent;
}

.admin-sidebar nav a:hover,
.admin-sidebar nav a.active {
    background: rgba(255, 255, 255, 0.1);
    border-left-color: var(--primary-red);
}

.admin-main {
    margin-left: 260px;
    flex: 1;
    padding: 2rem;
    background: var(--light-gray);
    min-height: 100vh;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.admin-header h1 {
    color: var(--primary-blue);
    font-size: 2rem;
}

.card {
    background: var(--white);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead {
    background: var(--light-gray);
}

.data-table th,
.data-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    font-weight: 600;
    color: var(--primary-blue);
}

.data-table tbody tr:hover {
    background: var(--light-gray);
}

.badge {
    display: inline-block;
    padding: 0.375rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.badge-success {
    background: #D1FAE5;
    color: #065F46;
}

.badge-warning {
    background: #FEF3C7;
    color: #92400E;
}

.badge-danger {
    background: #FEE2E2;
    color: #991B1B;
}

@media (max-width: 968px) {
    .admin-sidebar {
        width: 100%;
        height: auto;
        position: relative;
    }
    
    .admin-main {
        margin-left: 0;
        padding: 1rem;
    }
    
    .admin-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .data-table {
        font-size: 0.875rem;
    }
    
    .data-table th,
    .data-table td {
        padding: 0.75rem 0.5rem;
    }
}

/* ========================================
   RESPONSIVE TABLE
   ======================================== */

@media (max-width: 768px) {
    .data-table thead {
        display: none;
    }
    
    .data-table tbody tr {
        display: block;
        margin-bottom: 1rem;
        border: 1px solid var(--border-color);
        border-radius: 8px;
        padding: 1rem;
    }
    
    .data-table tbody td {
        display: block;
        text-align: right;
        padding: 0.5rem 0;
        border: none;
    }
    
    .data-table tbody td::before {
        content: attr(data-label);
        float: left;
        font-weight: 600;
        color: var(--primary-blue);
    }
}

/* ========================================
   FOOTER (Style Formation Langevin)
   ======================================== */

.main-footer {
    background: var(--primary-blue);
    color: var(--white);
    padding: 3rem 0 1.5rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    margin-bottom: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    color: var(--white);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: var(--primary-red);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.8);
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

/* ========================================
   UTILITIES
   ======================================== */

.text-center {
    text-align: center;
}

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.p-0 { padding: 0; }
.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

/* ========================================
   ANIMATIONS
   ======================================== */

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

.fade-in {
    animation: fadeIn 0.5s ease-out;
}

/* ========================================
   PRINT STYLES
   ======================================== */

@media print {
    .main-header,
    .main-footer,
    .admin-sidebar,
    .btn-primary,
    .btn-secondary {
        display: none;
    }
    
    .admin-main {
        margin-left: 0;
    }
}