/* --- VARIABLES ET RESET --- */
:root {
    --bg-color: #f5f0e6;      /* Beige premium */
    --text-dark: #1a1a1a;     /* Noir doux */
    --text-light: #555555;    /* Gris pour sous-titres */
    --white: #ffffff;
    --accent: #2c2c2c;        /* Accentuation foncée */
    
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --transition-fast: 0.3s ease;
    --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
    font-family: var(--font-body);
    background-color: var(--bg-color);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

/* --- TYPOGRAPHIE --- */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    color: var(--text-dark);
    font-weight: 600;
    line-height: 1.2;
}

h1 { font-size: clamp(2.5rem, 5vw, 4.5rem); margin-bottom: 1.5rem; letter-spacing: -0.02em; }
h2 { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: 1.5rem; }
h3 { font-size: 1.5rem; margin-bottom: 0.5rem; }

p { margin-bottom: 1rem; color: var(--text-light); }
.subtitle { font-size: 1.25rem; margin-bottom: 2.5rem; max-width: 700px; }

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

/* --- STRUCTURE COMMUNE --- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.page-padding {
    padding-top: 120px;
    padding-bottom: 80px;
}

.w-100 { width: 100%; }
.text-center { text-align: center; }

/* --- HEADER & NAVIGATION --- */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem 0;
    background-color: rgba(245, 240, 230, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
}

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

.logo {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: -0.02em;
}

.nav-links {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    font-weight: 500;
    position: relative;
}

.nav-links a:not(.btn-nav)::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--text-dark);
    transition: var(--transition-fast);
}

.nav-links a:not(.btn-nav):hover::after,
.nav-links a.active:not(.btn-nav)::after {
    width: 100%;
}

/* --- BOUTONS --- */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 500;
    cursor: pointer;
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background-color: transparent;
    color: var(--text-dark);
    border-color: var(--text-dark);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-dark);
    border-color: var(--text-dark);
}

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

.btn-nav {
    background-color: var(--text-dark);
    color: var(--bg-color);
    padding: 0.6rem 1.5rem;
    border-radius: 50px;
}

.btn-nav:hover {
    background-color: var(--text-light);
}

/* --- ACCUEIL --- */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.about {
    padding: 6rem 0;
    background-color: var(--white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-image img {
    width: 100%;
    border-radius: 12px;
    object-fit: cover;
}

.values {
    padding: 8rem 0;
}

.values-text {
    font-size: 1.25rem;
    max-width: 800px;
    margin: 0 auto;
    line-height: 2;
}

/* --- PORTFOLIO --- */
.portfolio-header { margin-bottom: 4rem; }

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 4rem 3rem;
}

/* Grille asymétrique pour un style agence */
.portfolio-grid .project-card:nth-child(even) { margin-top: 4rem; }
.portfolio-grid .project-card:nth-child(3) { grid-column: span 2; } /* Un grand élément au milieu */
.portfolio-grid .project-card:nth-child(3) .project-image { height: 600px; }

.project-card {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.project-card:hover {
    transform: translateY(-10px);
}

.project-image {
    width: 100%;
    height: 400px;
    border-radius: 12px;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.project-card:hover .project-image img {
    transform: scale(1.05);
}

/* --- CONTACT --- */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info-box {
    margin-top: 3rem;
    padding: 2rem;
    background-color: var(--white);
    border-radius: 12px;
    border-left: 4px solid var(--text-dark);
}

.contact-form {
    background-color: var(--white);
    padding: 3rem;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.03);
}

.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.input-group input,
.input-group textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 1rem;
    background-color: #faf9f6;
    transition: var(--transition-fast);
}

.input-group input:focus,
.input-group textarea:focus {
    outline: none;
    border-color: var(--text-dark);
    background-color: var(--white);
}

/* --- FOOTER --- */
footer {
    padding: 3rem 0;
    border-top: 1px solid rgba(0,0,0,0.1);
}

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

.footer-link {
    font-weight: 500;
    text-decoration: underline;
    text-underline-offset: 4px;
}

/* --- ANIMATIONS (Ajoutées via JS) --- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* --- RESPONSIVE MOBILE --- */
@media (max-width: 768px) {
    .nav-links { display: none; /* Pour la V1 simple, on cache sur mobile ou on fait une liste simple */ }
    
    .hero-actions { flex-direction: column; }
    .hero { height: auto; padding: 120px 0 60px; }
    
    .about-grid, .contact-container { grid-template-columns: 1fr; gap: 2rem; }
    
    .portfolio-grid { grid-template-columns: 1fr; gap: 3rem; }
    .portfolio-grid .project-card:nth-child(even) { margin-top: 0; }
    .portfolio-grid .project-card:nth-child(3) { grid-column: span 1; }
    .portfolio-grid .project-card:nth-child(3) .project-image { height: 400px; }
    
    .contact-form { padding: 1.5rem; }
    .footer-container { flex-direction: column; gap: 1rem; text-align: center; }
}