/* Variables de couleurs */
:root {
    --primary-blue: #2563eb;
    --secondary-blue: #1d4ed8;
    --orange: #f97316;
    --white: #ffffff;
    --light-gray: #f8fafc;
    --dark-gray: #334155;
    --gray: #64748b;
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --success: #10b981;
    --error: #ef4444;
}

/* Reset et base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: var(--light-gray);
}

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

/* Navigation */
.navbar {
    background: var(--white);
    box-shadow: var(--shadow);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-blue);
}

.logo i {
    font-size: 2rem;
}

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

/* Boutons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

.btn-primary:hover {
    background: var(--secondary-blue);
    transform: translateY(-2px);
}

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

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

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

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

.btn-success:hover {
    background: #0da271;
    transform: translateY(-2px);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--white);
    padding: 8rem 2rem 4rem;
    position: relative;
    margin-top: 60px;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    font-weight: 800;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-wave {
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    overflow: hidden;
    color: var(--light-gray);
}

.hero-wave svg {
    display: block;
    width: calc(100% + 1.3px);
    height: 120px;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    justify-content: center;
    align-items: center;
}

.modal.active {
    display: flex;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background: var(--white);
    border-radius: 16px;
    width: 90%;
    max-width: 450px;
    padding: 2rem;
    box-shadow: var(--shadow);
    animation: slideUp 0.3s ease;
}

.modal-large {
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
}

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

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

.modal-header h2 {
    color: var(--dark-gray);
    font-size: 1.75rem;
}

.close-btn {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--gray);
    cursor: pointer;
    transition: var(--transition);
}

.close-btn:hover {
    color: var(--primary-blue);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--dark-gray);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-group input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.modal-footer {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--gray);
}

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

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

/* Section Cours */
.courses-section {
    padding: 4rem 2rem;
    display: none;
}

.courses-section.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    color: var(--dark-gray);
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    color: var(--gray);
    margin-bottom: 3rem;
    font-size: 1.125rem;
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.course-card {
    background: var(--white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    animation: fadeInUp 0.5s ease forwards;
    opacity: 0;
}

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

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

.course-header {
    color: var(--white);
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
}

.course-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(0,0,0,0.1) 100%);
}

.course-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    opacity: 0.9;
    position: relative;
    z-index: 1;
}

.course-header h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    position: relative;
    z-index: 1;
}

.course-price {
    font-size: 1.75rem;
    font-weight: bold;
    margin-top: 0.5rem;
    position: relative;
    z-index: 1;
}

.course-body {
    padding: 1.5rem;
}

.course-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e2e8f0;
    flex-wrap: wrap;
    gap: 1rem;
}

.course-detail {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--gray);
    font-size: 0.9rem;
}

.course-description {
    color: var(--dark-gray);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.course-details {
    color: var(--gray);
    font-size: 0.95rem;
    line-height: 1.7;
}

.course-details h4 {
    color: var(--dark-gray);
    margin: 1rem 0 0.5rem;
    font-size: 1.1rem;
}

.course-details ul {
    padding-left: 1.5rem;
    margin: 0.5rem 0;
}

.course-details li {
    margin-bottom: 0.25rem;
}

.course-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid #e2e8f0;
}

.btn-course-info, .btn-course-enroll {
    flex: 1;
}

/* Modal détails cours */
.modal-body {
    padding: 1.5rem;
}

.course-modal-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    background: #f8fafc;
    padding: 1.5rem;
    border-radius: 12px;
    margin-bottom: 2rem;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0.75rem;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.info-item i {
    color: var(--primary-blue);
    font-size: 1.25rem;
}

.modal-body h3 {
    color: var(--dark-gray);
    margin: 1.5rem 0 1rem;
    font-size: 1.25rem;
}

.modal-body ul {
    padding-left: 1.5rem;
    margin: 1rem 0;
}

.modal-body li {
    margin-bottom: 0.5rem;
    color: var(--gray);
}

.course-requirements {
    background: #f8fafc;
    padding: 1.5rem;
    border-radius: 12px;
    margin-top: 1.5rem;
}

/* Message pour invités */
.guest-message {
    padding: 6rem 2rem;
    text-align: center;
}

.message-card {
    background: var(--white);
    border-radius: 16px;
    padding: 3rem;
    box-shadow: var(--shadow);
    max-width: 500px;
    margin: 0 auto;
}

.message-card i {
    font-size: 4rem;
    color: var(--primary-blue);
    margin-bottom: 1.5rem;
}

.message-card h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
    color: var(--dark-gray);
}

.message-card p {
    color: var(--gray);
    margin-bottom: 2rem;
}

.message-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* Notification */
.notification {
    position: fixed;
    top: 100px;
    right: 20px;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    color: var(--white);
    font-weight: 600;
    box-shadow: var(--shadow);
    z-index: 3000;
    transform: translateX(400px);
    transition: transform 0.3s ease;
    max-width: 400px;
}

.notification.show {
    transform: translateX(0);
}

.notification.success {
    background: var(--success);
}

.notification.error {
    background: var(--error);
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .nav-container {
        padding: 1rem;
    }
    
    .courses-grid {
        grid-template-columns: 1fr;
    }
    
    .message-buttons {
        flex-direction: column;
    }
    
    .hero {
        padding: 6rem 1rem 3rem;
    }
    
    .course-actions {
        flex-direction: column;
    }
    
    .course-modal-info {
        grid-template-columns: 1fr;
    }
    
    .modal-footer {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .modal-content {
        padding: 1.5rem;
        margin: 1rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .message-card {
        padding: 2rem;
    }
    
    .courses-grid {
        grid-template-columns: 1fr;
    }
    
    .course-card {
        margin: 0 1rem;
    }
}