/* --- VARIABLES ET STYLE GLOBAL --- */
:root {
    --bg-color: #0f172a; /* Fond bleu nuit */
    --text-color: #f8fafc; /* Texte clair */
    --accent-color: #3b82f6; /* Bleu accent */
    --card-bg: #1e293b; /* Fond des cartes projets */
}

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

body {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.accent {
    color: var(--accent-color);
}

/* --- NAVIGATION --- */
nav {
    display: flex;
    justify-content: space-between;
    padding: 1.5rem 5%;
    background-color: rgba(15, 23, 42, 0.9);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav a { 
    color: var(--text-color); 
    text-decoration: none; 
    margin-left: 1.5rem; 
    font-weight: 500; 
}

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

.logo { 
    font-size: 1.5rem; 
    font-weight: bold; 
    color: var(--accent-color); 
}

/* --- EN-TÊTE (HERO) --- */
header {
    text-align: center;
    padding: 100px 5%;
    max-width: 800px;
    margin: 0 auto;
}

header h1 { 
    font-size: 3rem; 
    margin-bottom: 1rem; 
}

header p { 
    font-size: 1.2rem; 
    color: #94a3b8; 
    margin-bottom: 2rem; 
}

.btn {
    display: inline-block;
    background-color: var(--accent-color);
    color: white;
    padding: 10px 25px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: background 0.3s;
}

.btn:hover { 
    background-color: #2563eb; 
}

/* --- SECTION PROJETS --- */
.section-title { 
    text-align: center; 
    font-size: 2rem; 
    margin: 4rem 0 2rem; 
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 0 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.project-card {
    background-color: var(--card-bg);
    border-radius: 10px;
    padding: 1.5rem;
    transition: transform 0.3s;
    border: 1px solid #334155;
}

.project-card:hover { 
    transform: translateY(-5px); 
}

.project-card h3 { 
    margin-bottom: 0.5rem; 
    font-size: 1.4rem; 
    color: var(--accent-color); 
}

.project-card p { 
    color: #cbd5e1; 
    margin-bottom: 1rem; 
    font-size: 0.95rem; 
}

.tags { 
    display: flex; 
    gap: 0.5rem; 
    flex-wrap: wrap; 
    margin-bottom: 1rem; 
}

.tag { 
    background: #334155; 
    padding: 3px 10px; 
    border-radius: 15px; 
    font-size: 0.8rem; 
}

.project-links a { 
    color: var(--text-color); 
    text-decoration: underline; 
    margin-right: 1rem; 
    font-size: 0.9rem;
}

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

/* --- PIED DE PAGE / CONTACT --- */
footer {
    text-align: center;
    padding: 4rem 5% 2rem;
    margin-top: 4rem;
    border-top: 1px solid #334155;
}

footer .subtitle {
    color: #94a3b8; 
    margin-top: 10px;
}

footer .copyright {
    margin-top: 3rem; 
    font-size: 0.8rem; 
    color: #64748b;
}