/* ===================================
   SkillFlow - Styles CSS
   Design: Blanc & Noir, Moderne, Épuré
   =================================== */

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

:root {
    --color-black: #111111;
    --color-white: #ffffff;
    --color-gray-100: #f8f9fa;
    --color-gray-200: #e9ecef;
    --color-gray-300: #dee2e6;
    --color-gray-400: #ced4da;
    --color-gray-500: #adb5bd;
    --color-gray-600: #6c757d;
    --color-gray-700: #495057;
    --color-gray-800: #343a40;
    --color-gray-900: #212529;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.12);
    
    --transition: all 0.3s ease;
    --border-radius: 12px;
    --border-radius-lg: 20px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-black);
    background-color: var(--color-white);
}

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

ul {
    list-style: none;
}

img, svg {
    max-width: 100%;
    height: auto;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
}

h2 {
    font-size: clamp(2rem, 4vw, 2.75rem);
}

h3 {
    font-size: 1.5rem;
}

.highlight {
    color: var(--color-black);
    position: relative;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 0;
    width: 100%;
    height: 8px;
    background-color: var(--color-gray-200);
    z-index: -1;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background-color: var(--color-gray-800);
    border-color: var(--color-gray-800);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-black);
    border-color: var(--color-gray-300);
}

.btn-secondary:hover {
    border-color: var(--color-black);
    background-color: var(--color-gray-100);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-black);
    border-color: var(--color-black);
}

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

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

.btn-white:hover {
    background-color: var(--color-gray-100);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-lg {
    padding: 18px 36px;
    font-size: 1.1rem;
}

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

/* ===================================
   Navigation
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 16px 0;
    border-bottom: 1px solid var(--color-gray-200);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-text {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-black);
}

.logo-accent {
    color: var(--color-gray-600);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-links a {
    font-weight: 500;
    color: var(--color-gray-700);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-black);
    transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-black);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    cursor: pointer;
    gap: 6px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-black);
    transition: var(--transition);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    padding: 160px 0 100px;
    background: linear-gradient(180deg, var(--color-gray-100) 0%, var(--color-white) 100%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content h1 {
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-gray-600);
    margin-bottom: 32px;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-image svg {
    width: 100%;
    max-width: 500px;
}

/* ===================================
   Features Section
   =================================== */
.features {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 16px;
}

.section-subtitle {
    text-align: center;
    color: var(--color-gray-600);
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto 60px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.feature-card {
    padding: 32px;
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius-lg);
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--color-black);
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.feature-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--color-gray-600);
    font-size: 0.95rem;
}

/* ===================================
   Formations Preview Section
   =================================== */
.formations-preview {
    padding: 100px 0;
    background-color: var(--color-gray-100);
}

.formations-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 50px;
}

.formation-card {
    background-color: var(--color-white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.formation-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.formation-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.formation-image svg {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.formation-content {
    padding: 24px;
}

.formation-tag {
    display: inline-block;
    padding: 6px 12px;
    background-color: var(--color-gray-100);
    color: var(--color-gray-700);
    font-size: 0.8rem;
    font-weight: 500;
    border-radius: 20px;
    margin-bottom: 12px;
}

.formation-content h3 {
    margin-bottom: 12px;
}

.formation-content p {
    color: var(--color-gray-600);
    margin-bottom: 20px;
    font-size: 0.95rem;
}

/* ===================================
   Boutique Page
   =================================== */
.page-header {
    padding: 140px 0 60px;
    background: linear-gradient(180deg, var(--color-gray-100) 0%, var(--color-white) 100%);
    text-align: center;
}

.page-header h1 {
    margin-bottom: 16px;
}

.page-header p {
    color: var(--color-gray-600);
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto;
}

.boutique-section {
    padding: 60px 0 100px;
}

.boutique-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.product-card {
    display: grid;
    grid-template-columns: 280px 1fr;
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: var(--transition);
}

.product-card:hover {
    border-color: var(--color-black);
    box-shadow: var(--shadow-lg);
}

.product-image {
    width: 100%;
    height: 100%;
    min-height: 250px;
    background-color: var(--color-gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-image svg {
    width: 80%;
    height: 80%;
}

.product-content {
    padding: 30px;
    display: flex;
    flex-direction: column;
}

.product-tag {
    display: inline-block;
    padding: 6px 14px;
    background-color: var(--color-black);
    color: var(--color-white);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 20px;
    margin-bottom: 16px;
    width: fit-content;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.product-content h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.product-content > p {
    color: var(--color-gray-600);
    margin-bottom: 20px;
    flex-grow: 1;
}

.product-features {
    margin-bottom: 24px;
}

.product-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--color-gray-700);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.product-features li::before {
    content: '';
    width: 18px;
    height: 18px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23111' stroke-width='2'%3E%3Cpath d='M20 6L9 17l-5-5'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    flex-shrink: 0;
}

.product-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 20px;
    border-top: 1px solid var(--color-gray-200);
}

.product-price {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-black);
}

.product-price .currency {
    font-size: 1rem;
    font-weight: 500;
}

/* ===================================
   CTA Section
   =================================== */
.cta {
    padding: 100px 0;
    background-color: var(--color-black);
    color: var(--color-white);
}

.cta-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta-content h2 {
    margin-bottom: 16px;
}

.cta-content p {
    color: var(--color-gray-400);
    font-size: 1.125rem;
    margin-bottom: 32px;
}

/* ===================================
   Contact Page
   =================================== */
.contact-section {
    padding: 60px 0 100px;
}

.contact-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.contact-card {
    background-color: var(--color-gray-100);
    border-radius: var(--border-radius-lg);
    padding: 60px 40px;
    margin-bottom: 40px;
}

.contact-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
}

.contact-card h2 {
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.contact-email {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-black);
    display: inline-block;
    margin-bottom: 16px;
    padding-bottom: 4px;
    border-bottom: 2px solid var(--color-black);
}

.contact-email:hover {
    color: var(--color-gray-700);
    border-color: var(--color-gray-700);
}

.response-time-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background-color: var(--color-white);
    border-radius: 30px;
    font-weight: 500;
    color: var(--color-gray-700);
}

.response-time-badge svg {
    width: 20px;
    height: 20px;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.info-card {
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius);
    padding: 24px;
    transition: var(--transition);
}

.info-card:hover {
    border-color: var(--color-black);
}

.info-card h4 {
    font-size: 1rem;
    margin-bottom: 8px;
}

.info-card p {
    color: var(--color-gray-600);
    font-size: 0.9rem;
}

/* ===================================
   Legal Pages
   =================================== */
.legal-section {
    padding: 60px 0 100px;
}

.legal-content {
    max-width: 800px;
    margin: 0 auto;
}

.legal-content h2 {
    font-size: 1.5rem;
    margin: 40px 0 16px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--color-gray-200);
}

.legal-content h2:first-child {
    margin-top: 0;
}

.legal-content p {
    color: var(--color-gray-700);
    margin-bottom: 16px;
}

.legal-content ul {
    margin: 16px 0;
    padding-left: 24px;
}

.legal-content li {
    color: var(--color-gray-700);
    margin-bottom: 8px;
    list-style: disc;
}

.legal-content a {
    color: var(--color-black);
    text-decoration: underline;
}

.legal-content a:hover {
    color: var(--color-gray-600);
}

.placeholder {
    background-color: var(--color-gray-100);
    padding: 4px 8px;
    border-radius: 4px;
    font-family: monospace;
    color: var(--color-gray-600);
}

.last-updated {
    color: var(--color-gray-500);
    font-size: 0.9rem;
    margin-bottom: 40px;
}

/* ===================================
   Footer
   =================================== */
.footer {
    background-color: var(--color-gray-100);
    padding: 60px 0 30px;
    border-top: 1px solid var(--color-gray-200);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand p {
    color: var(--color-gray-600);
    margin-top: 16px;
    max-width: 280px;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 1rem;
    margin-bottom: 20px;
}

.footer-links ul li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--color-gray-600);
}

.footer-links a:hover {
    color: var(--color-black);
}

.footer-contact a {
    color: var(--color-black);
    font-weight: 500;
}

.footer-contact .response-time {
    color: var(--color-gray-500);
    font-size: 0.9rem;
    margin-top: 8px;
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid var(--color-gray-300);
    text-align: center;
}

.footer-bottom p {
    color: var(--color-gray-500);
    font-size: 0.9rem;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .boutique-grid {
        grid-template-columns: 1fr;
    }
    
    .product-card {
        grid-template-columns: 1fr;
    }
    
    .product-image {
        min-height: 200px;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        top: 73px;
        left: 0;
        right: 0;
        background-color: var(--color-white);
        flex-direction: column;
        padding: 30px;
        gap: 20px;
        border-bottom: 1px solid var(--color-gray-200);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-image {
        order: -1;
    }
    
    .hero-image svg {
        max-width: 350px;
        margin: 0 auto;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .formations-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-brand p {
        max-width: none;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero {
        padding: 140px 0 60px;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    .btn-lg {
        padding: 16px 24px;
        font-size: 1rem;
    }
    
    .feature-card {
        padding: 24px;
    }
    
    .product-content {
        padding: 20px;
    }
    
    .product-footer {
        flex-direction: column;
        gap: 16px;
        align-items: stretch;
    }
    
    .product-price {
        text-align: center;
    }
    
    .product-footer .btn {
        width: 100%;
    }
    
    .contact-card {
        padding: 40px 24px;
    }
    
    .contact-email {
        font-size: 1.2rem;
    }
}