/* ============================================
   Le Hub du Formateur 4.0 - Andragogie Augmentée
   Stylesheet Principal
   ============================================ */

/* === Variables CSS === */
:root {
    /* Couleurs principales - Inspirées du logo arc-en-ciel */
    --primary-color: #7c3aed;
    --primary-dark: #6d28d9;
    --primary-light: #9333ea;
    --secondary-color: #3b82f6;
    --secondary-dark: #2563eb;
    
    /* Couleurs d'accentuation - Palette arc-en-ciel */
    --accent-color: #f59e0b;
    --accent-pink: #e91e63;
    --accent-magenta: #c026d3;
    --accent-cyan: #06b6d4;
    --accent-teal: #14b8a6;
    --accent-yellow: #fbbf24;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    
    /* Dégradés signature */
    --gradient-rainbow: linear-gradient(135deg, #e91e63, #c026d3, #7c3aed, #3b82f6, #06b6d4, #14b8a6, #fbbf24);
    --gradient-primary: linear-gradient(135deg, #c026d3, #7c3aed, #3b82f6);
    --gradient-secondary: linear-gradient(135deg, #3b82f6, #06b6d4, #14b8a6);
    
    /* Couleurs neutres */
    --dark: #0f172a;
    --gray-dark: #1e293b;
    --gray: #64748b;
    --gray-light: #cbd5e1;
    --gray-lighter: #f1f5f9;
    --white: #ffffff;
    
    /* Typographie */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Espacements */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Ombres */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    
    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    scroll-padding-top: 100px; /* Compensation pour navbar fixe */
}

body {
    font-family: var(--font-primary);
    color: var(--dark);
    background-color: var(--white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--dark);
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--gray);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
}

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

/* === Navigation === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: box-shadow var(--transition-normal);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    max-width: 1400px;
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
}

.nav-brand i {
    font-size: 1.5rem;
}

.nav-logo {
    height: 2rem;
    width: auto;
    object-fit: contain;
    display: block;
    flex-shrink: 0;
}

.brand-name {
    font-family: var(--font-heading);
    display: flex;
    align-items: center;
    line-height: 1.2;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 0.25rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.nav-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--dark);
    transition: all var(--transition-fast);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
    flex-wrap: nowrap;
}

.nav-menu a {
    color: var(--gray-dark);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-menu a:hover {
    color: var(--primary-color);
    background-color: var(--gray-lighter);
}

.nav-menu a.active {
    color: var(--white);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    font-weight: 600;
    box-shadow: var(--shadow-sm);
}

.nav-menu .nav-cta {
    background: linear-gradient(135deg, var(--accent-color), #f59e0b);
    color: var(--white) !important;
    padding: var(--spacing-xs) var(--spacing-md);
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
    animation: pulse-subtle 2s ease-in-out infinite;
}

.nav-menu .nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.5);
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.nav-menu .nav-cta.active {
    background: linear-gradient(135deg, #d97706, #b45309);
    box-shadow: 0 2px 8px rgba(217, 119, 6, 0.4);
    animation: none;
}

@keyframes pulse-subtle {
    0%, 100% {
        box-shadow: 0 2px 8px rgba(245, 158, 11, 0.3);
    }
    50% {
        box-shadow: 0 2px 12px rgba(245, 158, 11, 0.5);
    }
}

/* === Hero Section === */
.hero {
    position: relative;
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 50px var(--spacing-md) var(--spacing-xl);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-rainbow);
    opacity: 0.08;
    z-index: -1;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(192, 38, 211, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(59, 130, 246, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 50% 20%, rgba(251, 191, 36, 0.08) 0%, transparent 40%);
}

.hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background-color: var(--gray-lighter);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-dark);
    margin-bottom: var(--spacing-md);
}

.hero-badge i {
    color: var(--accent-color);
}

.hero-logo-banner {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding: 0;
}

.hero-logo-img {
    max-width: clamp(450px, 75vw, 900px);
    width: 100%;
    height: auto;
    object-fit: contain;
    filter: drop-shadow(0 10px 30px rgba(124, 58, 237, 0.5));
    transition: all var(--transition-normal);
    animation: glow 3s ease-in-out infinite;
}

.hero-logo-img:hover {
    transform: scale(1.03);
    filter: drop-shadow(0 15px 40px rgba(192, 38, 211, 0.7));
}

@keyframes glow {
    0%, 100% {
        filter: drop-shadow(0 10px 30px rgba(124, 58, 237, 0.5));
    }
    50% {
        filter: drop-shadow(0 12px 36px rgba(192, 38, 211, 0.6));
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

.hero-title {
    margin-bottom: var(--spacing-xs);
}

.title-main {
    display: block;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
}

.hero-subtitle {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--dark);
    margin-bottom: var(--spacing-xs);
}

.hero-description {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--gray);
    margin-top: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
    margin-top: var(--spacing-xl);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-color);
    font-family: var(--font-heading);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray);
    font-weight: 500;
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn i {
    font-size: 1.125rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    color: var(--white);
}

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

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

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.125rem;
}

/* === Sections === */
section {
    padding: var(--spacing-2xl) 0;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
}

.section-tag {
    display: inline-block;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-sm);
}

.section-intro {
    font-size: 1.125rem;
    color: var(--gray);
    line-height: 1.8;
}

/* === Mission Section === */
.mission {
    background-color: var(--gray-lighter);
}

.mission-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.mission-card {
    background-color: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal);
}

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

.mission-icon {
    width: 70px;
    height: 70px;
    border-radius: var(--radius-lg);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.25);
}

.mission-icon i {
    font-size: 2rem;
    color: var(--white);
}

.mission-card h3 {
    color: var(--dark);
    margin-bottom: var(--spacing-sm);
}

.mission-card p {
    color: var(--gray);
    line-height: 1.7;
}

/* === Value Proposition === */
.value-proposition {
    background-color: var(--white);
}

.value-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-xl);
    align-items: center;
}

.value-text h2 {
    margin-bottom: var(--spacing-md);
}

.value-text p {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

.value-list {
    list-style: none;
    margin-bottom: var(--spacing-xl);
}

.value-list li {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    align-items: flex-start;
}

.value-list i {
    color: var(--success-color);
    font-size: 1.25rem;
    flex-shrink: 0;
    margin-top: 0.125rem;
}

.value-list span {
    color: var(--gray-dark);
    line-height: 1.6;
}

.value-visual {
    display: grid;
    gap: var(--spacing-md);
}

.visual-card {
    background: linear-gradient(135deg, var(--gray-lighter), var(--white));
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 2px solid var(--gray-light);
}

.visual-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.visual-card h4 {
    color: var(--dark);
    margin-bottom: var(--spacing-xs);
}

.visual-card p {
    color: var(--gray);
    margin: 0;
}

/* === Offerings Section === */
.offerings {
    background-color: var(--gray-lighter);
}

.offerings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.offering-card {
    background-color: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    position: relative;
}

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

.offering-card.featured {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05), rgba(124, 58, 237, 0.05));
    border: 2px solid var(--primary-color);
}

.featured-badge {
    position: absolute;
    top: -12px;
    right: 20px;
    background: linear-gradient(135deg, var(--accent-color), #f59e0b);
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.offering-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.offering-header i {
    font-size: 2.5rem;
    color: var(--primary-color);
    flex-shrink: 0;
}

.offering-header h3 {
    margin: 0;
    line-height: 1.3;
    word-wrap: break-word;
}

.offering-card p {
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--primary-color);
    font-weight: 600;
    transition: gap var(--transition-fast);
}

.card-link:hover {
    gap: var(--spacing-sm);
}

.featured-link {
    color: var(--secondary-color);
}

/* === CTA Section === */
.cta-section {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-md);
}

.cta-content h2 {
    color: var(--white);
    margin-bottom: var(--spacing-md);
}

.cta-content p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xl);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.cta-section .btn-primary {
    background-color: var(--white);
    color: var(--primary-color);
    font-weight: 700;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
}

.cta-section .btn-primary:hover {
    background-color: var(--accent-color);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.cta-section .btn-secondary {
    background-color: transparent;
    border: 2px solid var(--white);
    color: var(--white);
    font-weight: 700;
}

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

/* === Footer === */
.footer {
    background-color: var(--gray-dark);
    color: var(--gray-light);
    padding: var(--spacing-2xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3,
.footer-section h4 {
    color: var(--white);
    margin-bottom: var(--spacing-md);
}

.footer-section h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.footer-section i {
    color: var(--primary-light);
}

.footer-section p {
    color: var(--gray-light);
    margin-bottom: var(--spacing-sm);
}

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

.footer-section ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-section ul a {
    color: var(--gray-light);
    transition: color var(--transition-fast);
}

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

/* Social Links in Footer */
.social-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-sm);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, #E1306C, #C13584, #833AB4, #5851DB, #405DE6);
    color: var(--white);
    border-radius: var(--radius-full);
    font-size: 1.3rem;
    transition: all var(--transition-normal);
    text-decoration: none;
    box-shadow: 0 4px 12px rgba(225, 48, 108, 0.3);
}

.social-link:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 6px 20px rgba(225, 48, 108, 0.5);
}

.social-link i {
    color: var(--white);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: var(--gray);
    margin: 0;
}

/* === Responsive Design === */
/* Ajustement navbar pour écrans moyens (réduction espacement) */
@media (max-width: 1100px) {
    .nav-menu {
        gap: var(--spacing-sm);
    }
    
    .nav-menu a {
        padding: var(--spacing-xs) 0.625rem;
        font-size: 0.9375rem;
    }
    
    .nav-menu .nav-cta {
        padding: var(--spacing-xs) 1rem;
    }
    
    .brand-name {
        font-size: 0.9375rem;
    }
}

/* Ajustement navbar pour petits écrans desktop */
@media (max-width: 900px) {
    .nav-menu {
        gap: 0.5rem;
    }
    
    .nav-menu a {
        padding: var(--spacing-xs) 0.5rem;
        font-size: 0.875rem;
    }
    
    .nav-menu .nav-cta {
        padding: var(--spacing-xs) 0.75rem;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: var(--white);
        box-shadow: var(--shadow-lg);
        padding: var(--spacing-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
        gap: var(--spacing-md);
    }
    
    .nav-menu a {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 1rem;
        width: 100%;
        text-align: center;
    }
    
    .nav-menu .nav-cta {
        padding: var(--spacing-xs) var(--spacing-md);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .value-content {
        grid-template-columns: 1fr;
    }
    
    .offering-header h3 {
        font-size: 1.25rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .hero-stats {
        gap: var(--spacing-md);
    }
    
    .hero-logo-banner {
        padding: var(--spacing-sm) 0;
    }
    
    .hero-logo-img {
        max-width: clamp(300px, 85vw, 600px);
    }
    
    .cta-buttons {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-xl: 2rem;
        --spacing-2xl: 3rem;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .offerings-grid,
    .mission-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-logo-img {
        max-width: 95vw;
    }
}

/* Ajustement pour très grands écrans */
@media (min-width: 1200px) {
    .offering-header h3 {
        font-size: 1.5rem;
    }
}