:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-color: #f8fafc;
    --text-muted: #94a3b8;
    --accent-color: #38bdf8;
    --font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-family);
    line-height: 1.6;
    padding: 0 20px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* --- NAVIGATION --- */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 30px 0;
    border-bottom: 1px solid #334155;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-color);
    text-decoration: none;
}

nav a {
    color: var(--text-muted);
    text-decoration: none;
    margin-left: 20px;
    transition: color 0.2s;
}

nav a:hover, nav a.active {
    color: var(--accent-color);
    font-weight: 600;
}

/* --- CONTENU --- */
main {
    flex: 1;
    padding: 40px 0;
}

h1 {
    font-size: 2.2rem;
    margin-bottom: 20px;
}

h1 span {
    color: var(--accent-color);
}

p {
    color: var(--text-muted);
    margin-bottom: 15px;
    font-size: 1.05rem;
}

/* --- GRILLES & CARTES --- */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.card {
    background-color: var(--card-bg);
    border-radius: 8px;
    padding: 25px;
    border: 1px solid #334155;
    transition: transform 0.2s, border-color 0.2s;
}

.card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-color);
}

.card h3 {
    margin-bottom: 10px;
    color: var(--text-color);
}

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

/* --- FORMULAIRE DE CONTACT --- */
.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-color);
}

input, textarea {
    width: 100%;
    padding: 12px;
    border-radius: 6px;
    border: 1px solid #334155;
    background-color: var(--card-bg);
    color: var(--text-color);
    font-family: inherit;
}

input:focus, textarea:focus {
    outline: 1px solid var(--accent-color);
}

button, .btn {
    display: inline-block;
    padding: 12px 24px;
    background-color: var(--accent-color);
    color: #000;
    font-weight: 600;
    text-decoration: none;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    transition: opacity 0.2s;
}

button:hover, .btn:hover {
    opacity: 0.9;
}

/* --- FOOTER --- */
footer {
    padding: 30px 0;
    border-top: 1px solid #334155;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}