/* ==========================================
   VARIABLES & RESET
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Palette sobre et moderne */
    --color-bg: #FAFAFA;
    --color-surface: #FFFFFF;
    --color-text-primary: #1A1A1A;
    --color-text-secondary: #6B6B6B;
    --color-accent: #fa7726;
    --color-accent-hover: #e66a1f;
    --color-border: #E5E5E5;

    /* Espacements */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;

    /* Typographie */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.875rem;
    --font-size-sm: 1rem;
    --font-size-md: 1.125rem;
    --font-size-lg: 1.5rem;
    --font-size-xl: 2rem;
    --font-size-2xl: 2.5rem;

    /* Ombres subtiles */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.08);

    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================
   TYPOGRAPHIE GLOBALE
   ========================================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

body {
    font-family: var(--font-family);
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    line-height: 1.6;
    font-size: var(--font-size-sm);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-text-primary);
}

h1 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    letter-spacing: -0.02em;
}

h2 {
    font-size: var(--font-size-xl);
    font-weight: 600;
}

h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

p {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ==========================================
   HEADER & NAVIGATION
   ========================================== */
header {
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-sm) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.95);
}

header nav ul {
    display: flex;
    justify-content: center;
    align-items: center;
    list-style: none;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

header nav ul li a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--font-size-xs);
    transition: var(--transition);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 6px;
    letter-spacing: 0.01em;
}

header nav ul li a:hover {
    color: var(--color-accent);
    background-color: rgba(37, 99, 235, 0.05);
}

/* ==========================================
   HERO SECTION
   ========================================== */
.hero {
    background-color: var(--color-surface);
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
    max-width: 800px;
    margin: var(--spacing-lg) auto;
    border-radius: 12px;
}

.hero h1 {
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: var(--font-size-md);
    max-width: 650px;
    margin: 0 auto var(--spacing-md);
}

.hero p strong {
    color: var(--color-text-primary);
    font-weight: 600;
}

/* ==========================================
   BOUTONS
   ========================================== */
.cta-button {
    display: inline-block;
    padding: 0.75rem 1.75rem;
    color: var(--color-surface);
    background-color: var(--color-accent);
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    font-size: var(--font-size-xs);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    letter-spacing: 0.01em;
}

.cta-button:hover {
    background-color: var(--color-accent-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

/* ==========================================
   SECTIONS PRÉSENTATION
   ========================================== */
.presentation,
.presentation-reverse {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-xl) var(--spacing-md);
    gap: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.presentation-reverse {
    flex-direction: row-reverse;
}

.image-container {
    flex: 1;
    display: flex;
    justify-content: center;
}

.illustration {
    width: 100%;
    max-width: 350px;
    height: auto;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

.text-container {
    flex: 1;
}

.text-container h2 {
    margin-bottom: var(--spacing-sm);
}

.text-container p {
    max-width: 100% !important;
}

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

.competence-category {
    margin: var(--spacing-lg) 0;
    text-align: center;
}

.competence-category h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

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

.competence-logos img {
    width: 48px;
    height: 48px;
    transition: var(--transition);
    border-radius: 8px;
    padding: 8px;
    background-color: var(--color-surface);
    box-shadow: var(--shadow-sm);
}

.competence-logos img:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

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

.projects-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.projects-header h1 {
    margin-bottom: var(--spacing-sm);
}

.projects-header p {
    font-size: var(--font-size-md);
}

.projects-header p strong {
    color: var(--color-text-primary);
}

/* Grille de projets */
.projects {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

.project {
    background-color: var(--color-surface);
    border-radius: 12px;
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    border: 1px solid var(--color-border);
}

.project:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: var(--color-accent);
}

.project-image {
    width: 100%;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    overflow: hidden;
    border-radius: 8px;
    background-color: var(--color-bg);
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 12px;
}

.project-details {
    flex: 1;
    text-align: left;
}

.project-details h2 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-primary);
}

.project-details p {
    font-size: var(--font-size-xs);
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
}

.project-details p strong {
    color: var(--color-text-primary);
    font-weight: 600;
}

.project-link {
    margin-top: var(--spacing-sm);
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.project-link .cta-button {
    padding: 0.5rem 1rem;
    font-size: var(--font-size-xs);
}

/* ==========================================
   CV & CERTIFICATIONS
   ========================================== */
.cv,
.certifs {
    padding: var(--spacing-xl) var(--spacing-md);
    max-width: 900px;
    margin: var(--spacing-lg) auto;
    background-color: var(--color-surface);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.cv h1,
.certifs h1 {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.cv-image {
    margin-top: var(--spacing-md);
    text-align: center;
}

.cv-image img {
    max-width: 100%;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
}

.cv .cta-button {
    display: inline-block;
    margin: 0.5rem;
}

.cv h1 {
    margin-bottom: var(--spacing-md);
}

.certif {
    background-color: var(--color-bg);
    padding: var(--spacing-md);
    border-radius: 8px;
    margin-bottom: var(--spacing-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.certif-image {
    width: 100%;
    max-width: 200px;
    margin-bottom: var(--spacing-sm);
}

.certif-image img {
    width: 100%;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
}

.certif-details h2 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
}

.certif-link {
    margin-top: var(--spacing-sm);
}

/* ==========================================
   FOOTER
   ========================================== */
footer {
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    text-align: center;
    padding: var(--spacing-lg) var(--spacing-md);
    margin-top: var(--spacing-xl);
}

footer p {
    font-size: var(--font-size-xs);
}

footer a {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

footer a:hover {
    color: var(--color-accent-hover);
    text-decoration: underline;
}

/* ==========================================
   ANIMATIONS
   ========================================== */
.slide-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.slide-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.slide-in-left {
    transform: translateX(-30px);
}

.slide-in-left.visible {
    transform: translateX(0);
}

.slide-in-right {
    transform: translateX(30px);
}

.slide-in-right.visible {
    transform: translateX(0);
}

/* ==========================================
   RESPONSIVE
   ========================================== */
@media (max-width: 768px) {
    :root {
        --font-size-2xl: 1.875rem;
        --font-size-xl: 1.5rem;
        --spacing-xl: 2.5rem;
    }

    .presentation,
    .presentation-reverse {
        flex-direction: column;
        padding: var(--spacing-md);
    }

    header nav ul {
        gap: var(--spacing-sm);
    }

    header nav ul li a {
        padding: var(--spacing-xs);
        font-size: 0.8rem;
    }

    .projects {
        grid-template-columns: 1fr;
        padding: var(--spacing-md);
    }

    .hero {
        padding: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .cta-button {
        padding: 0.6rem 1.2rem;
        font-size: 0.8rem;
    }

    .competence-logos img {
        width: 40px;
        height: 40px;
    }
}