/* * ALWEN STUDIO - REFONTE TOTALE (V3)
 * Architecture : Z-Layering strict & Typographie Suisse
 */

:root {
    /* PALETTE */
    --kaki: #2F3A32;
    --kaki-light: #4A564D;
    --ivory: #F4F3EF;
    --white: #FFFFFF;
    --black: #111111;
    
    /* FONTS */
    --font-serif: 'Playfair Display', serif;
    --font-sans: 'Inter', sans-serif;
    
    /* SPACING */
    --container-width: 1320px;
    --gutter: 2rem;
    
    /* ANIMATION */
    --ease: cubic-bezier(0.23, 1, 0.32, 1);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    background-color: var(--ivory); /* Couleur de fond de secours */
    color: var(--kaki);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

/* --- SYSTEME DE COUCHES (CRITIQUE POUR THREE.JS) --- */

/* COUCHE 1 : Le Canvas 3D (Tout au fond) */
#canvas-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1; /* Derrière tout */
    pointer-events: none; /* Laisse passer les clics */
    opacity: 0.6; /* Subtil */
}

/* COUCHE 2 : Le Contenu (Au dessus) */
.site-header, main, .site-footer {
    position: relative;
    z-index: 2;
}

/* --- TYPOGRAPHIE --- */
h1, h2, h3, h4 {
    font-family: var(--font-serif);
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.display-1 { font-size: clamp(3.5rem, 8vw, 7rem); }
.display-2 { font-size: clamp(2.5rem, 5vw, 4rem); }
.heading-3 { font-size: 2rem; margin-bottom: 1rem; }

.subtitle {
    font-family: var(--font-sans);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    color: var(--kaki-light);
    display: block;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.text-lead {
    font-size: 1.25rem;
    max-width: 60ch;
    font-weight: 300;
    margin-bottom: 2rem;
}

a { color: inherit; text-decoration: none; transition: 0.3s var(--ease); }

/* --- LAYOUT UTILS --- */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--gutter);
}

.section-padding { padding: 8rem 0; }
.section-full { min-height: 90vh; display: flex; align-items: center; }

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

@media (max-width: 900px) {
    .grid-2, .grid-3, .grid-sidebar { grid-template-columns: 1fr; gap: 3rem; }
    .section-padding { padding: 4rem 0; }
}

/* --- COMPOSANTS --- */

/* Images */
.img-reveal {
    overflow: hidden;
    background: rgba(47, 58, 50, 0.05);
}
.img-reveal img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 1.5s var(--ease);
}
.img-reveal:hover img { transform: scale(1.05); }

/* Boutons */
.btn {
    display: inline-flex;
    align-items: center;
    padding: 1rem 2.5rem;
    border: 1px solid var(--kaki);
    border-radius: 2px;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    background: transparent;
    cursor: pointer;
}
.btn:hover {
    background: var(--kaki);
    color: var(--ivory);
}

/* Cartes Projets */
.project-card {
    display: block;
    group: hover;
}
.project-card .meta {
    margin-top: 1.5rem;
    display: flex;
    justify-content: space-between;
    border-top: 1px solid rgba(47,58,50,0.2);
    padding-top: 1rem;
}

/* --- HEADER & NAV --- */
.site-header {
    padding: 2rem 0;
}
.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
}
.main-nav ul {
    display: flex;
    gap: 3rem;
    list-style: none;
}
.main-nav a {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
}
.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -5px; left: 0; width: 0; height: 1px;
    background: currentColor;
    transition: 0.4s var(--ease);
}
.main-nav a:hover::after, .main-nav a.active::after { width: 100%; }

@media (max-width: 768px) {
    .main-nav { display: none; } /* Mobile menu simplified for code clarity */
}

/* --- FOOTER --- */
.site-footer {
    border-top: 1px solid rgba(47,58,50,0.1);
    padding: 4rem 0;
    margin-top: 4rem;
    background: var(--ivory);
}

/* --- THEME DARK MODE (Blocks) --- */
.bg-dark {
    background-color: var(--kaki);
    color: var(--ivory);
}
.bg-dark .subtitle { color: rgba(244, 243, 239, 0.6); }
.bg-dark .btn { border-color: var(--ivory); color: var(--ivory); }
.bg-dark .btn:hover { background: var(--ivory); color: var(--kaki); }