/* ===================================
   DESIGN SYSTEM
   =================================== */

:root {
    /* Couleurs */
    --primary: #1B3A52;
    --accent: #B8986E;
    --text: #2C3E50;
    --bg: #FFFFFF;
    --bg-alt: #F8F9FA;
    --border: #E5E7EB;
    
    /* Typographie */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    
    /* Espacement */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    
    /* Transitions */
    --transition: all 0.3s ease;
}

/* ===================================
   RESET & BASE
   =================================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 18px;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===================================
   TYPOGRAPHY
   =================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

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

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

a:hover {
    color: var(--accent);
}

strong {
    font-weight: 600;
}

/* ===================================
   LAYOUT
   =================================== */

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===================================
   NAVIGATION
   =================================== */

.nav {
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary);
}

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

.nav-link {
    color: var(--text);
    font-size: 1rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent);
    background: var(--bg-alt);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

/* ===================================
   HERO SECTION
   =================================== */

.hero {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, var(--bg-alt) 0%, var(--bg) 100%);
}

.hero-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xs);
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--accent);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.hero-description {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.profile-placeholder {
    width: 200px;
    height: 200px;
    margin: 0 auto;
}

.profile-image {
    width: 100%;
    height: auto;
    border-radius: 50%;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

/* ===================================
   BUTTONS
   =================================== */

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

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

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

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

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

/* ===================================
   INTRO SECTION
   =================================== */

.intro {
    padding: var(--spacing-xl) 0;
}

.intro-content {
    max-width: 700px;
}

.section-subtitle {
    font-size: 1.75rem;
    color: var(--primary);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

.intro-pillars {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

.pillar {
    background: var(--bg-alt);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--accent);
}

.pillar h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
}

.pillar p {
    font-size: 0.95rem;
    margin-bottom: 0;
}

.intro-approach {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-alt);
    border-radius: var(--radius-md);
}

/* ===================================
   STATS SECTION
   =================================== */

.stats {
    padding: var(--spacing-lg) 0;
    background: var(--primary);
    color: var(--bg);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
    text-align: center;
}

.stat-item {
    padding: var(--spacing-sm);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.9;
    line-height: 1.4;
}

/* ===================================
   PAGE HEADER
   =================================== */

.page-header {
    padding: var(--spacing-lg) 0 var(--spacing-md);
    background: var(--bg-alt);
    text-align: center;
}

.page-header h1 {
    margin-bottom: var(--spacing-xs);
}

.page-subtitle {
    font-size: 1.125rem;
    color: var(--text);
    opacity: 0.8;
}

/* ===================================
   EXPERTISE SECTION
   =================================== */

.expertise-section {
    padding: var(--spacing-xl) 0;
}

.expertise-block {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--border);
}

.expertise-block:last-child {
    border-bottom: none;
}

.expertise-title {
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.expertise-content {
    margin-bottom: var(--spacing-md);
}

.expertise-list {
    list-style: none;
    padding-left: 0;
    margin: var(--spacing-sm) 0;
}

.expertise-list li {
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: var(--spacing-xs);
}

.expertise-list li:before {
    content: "—";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 600;
}

.skills-box {
    background: var(--bg-alt);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--accent);
}

.skills-box h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
}

.skills-list {
    list-style: none;
    padding-left: 0;
}

.skills-list li {
    padding: var(--spacing-xs) 0;
    padding-left: 1.5rem;
    position: relative;
}

.skills-list li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-size: 1.5rem;
    line-height: 1;
}

/* ===================================
   PROJECTS SECTION
   =================================== */

.projects-section {
    padding: var(--spacing-xl) 0;
}

.project-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    transition: var(--transition);
}

.project-card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    border-color: var(--accent);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xs);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.project-name {
    font-size: 1.75rem;
    margin-bottom: 0;
}

.project-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: #10B981;
    color: white;
    font-size: 0.875rem;
    border-radius: 999px;
    font-weight: 500;
}

.project-badge-completed {
    background: var(--accent);
}

.project-subtitle {
    font-size: 1.125rem;
    color: var(--accent);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.project-meta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.meta-item {
    display: flex;
    flex-direction: column;
}

.meta-label {
    font-size: 0.875rem;
    color: var(--text);
    opacity: 0.7;
    font-weight: 500;
}

.meta-value {
    font-size: 1rem;
    color: var(--primary);
    font-weight: 500;
}

.project-description {
    margin-bottom: var(--spacing-md);
}

.project-description ul {
    margin: var(--spacing-sm) 0;
    padding-left: 1.5rem;
}

.project-description li {
    margin-bottom: var(--spacing-xs);
}

.project-role {
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border);
    font-size: 0.95rem;
}

.other-projects {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 2px solid var(--border);
}

.other-projects h2 {
    margin-bottom: var(--spacing-md);
}

.other-projects-list {
    list-style: none;
    padding-left: 0;
}

.other-projects-list li {
    padding: var(--spacing-sm) 0;
    padding-left: 1.5rem;
    position: relative;
    border-bottom: 1px solid var(--border);
}

.other-projects-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 600;
}

.other-projects-list li:last-child {
    border-bottom: none;
}

/* ===================================
   CONTACT SECTION
   =================================== */

.contact-section {
    padding: var(--spacing-xl) 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-lg);
}

.contact-info h2,
.contact-form-wrapper h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.info-block {
    margin-bottom: var(--spacing-md);
}

.info-block h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
}

.info-block p {
    font-size: 0.95rem;
    margin-bottom: var(--spacing-xs);
}

.domains-box {
    background: var(--bg-alt);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-md);
}

.domains-box h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
}

.domains-list {
    list-style: none;
    padding-left: 0;
}

.domains-list li {
    padding: var(--spacing-xs) 0;
    padding-left: 1.5rem;
    position: relative;
    font-size: 0.95rem;
}

.domains-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 600;
}

/* ===================================
   FORM STYLES
   =================================== */

.contact-form {
    background: var(--bg-alt);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
}

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: var(--transition);
}

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

.form-group textarea {
    resize: vertical;
}

.form-status {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    display: none;
}

.form-status.success {
    background: #D1FAE5;
    color: #065F46;
    display: block;
}

.form-status.error {
    background: #FEE2E2;
    color: #991B1B;
    display: block;
}

/* ===================================
   CTA SECTION
   =================================== */

.cta-section {
    padding: var(--spacing-lg) 0;
    background: var(--bg-alt);
    text-align: center;
}

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

/* ===================================
   FOOTER
   =================================== */

.footer {
    background: var(--primary);
    color: var(--bg);
    padding: var(--spacing-lg) 0 var(--spacing-md);
    margin-top: var(--spacing-xl);
}

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

.footer-quote {
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
    font-style: italic;
    opacity: 0.9;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.footer-links a {
    color: var(--accent);
    font-weight: 500;
}

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

.footer-copyright {
    font-size: 0.875rem;
    opacity: 0.7;
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */

@media (max-width: 768px) {
    /* Typography */
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    /* Navigation */
    .nav-menu {
        position: fixed;
        top: 65px;
        left: -100%;
        flex-direction: column;
        background: var(--bg);
        width: 100%;
        padding: var(--spacing-md);
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
        transition: var(--transition);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    /* Hero */
    .hero-content {
        grid-template-columns: 1fr;
    }
    
    .hero-image {
        order: -1;
    }
    
    .profile-placeholder {
        width: 150px;
        height: 150px;
    }
    
    /* Intro pillars */
    .intro-pillars {
        grid-template-columns: 1fr;
    }
    
    /* Stats */
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-md);
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    /* Contact */
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    /* Buttons */
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
}

@media (max-width: 480px) {
    /* Container */
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    /* Stats */
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    /* Spacing */
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
}

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

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

.hero,
.intro,
.expertise-block,
.project-card {
    animation: fadeIn 0.6s ease-out;
}

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

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

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }