:root {
    --blue-sg4f: #364F6B;
    --orange-sg4f: #FCE38A;
    --white: #ffffff;
    --soft-gray: #f8fafc;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--white);
    color: var(--blue-sg4f);
    line-height: 1.6;
}

/* Header Institutionnel */
.header-main {
    padding: 40px 20px;
    text-align: center;
    background: var(--white);
}

.logo-img {
    max-width: 200px;
    height: auto;
    transition: transform 0.3s ease;
}

/* Section Accès : Look Logo (Bleu sur Orange) */
.access-section {
    background: linear-gradient(135deg, var(--orange-sg4f) 0%, #fff9e6 100%);
    padding: 100px 20px;
    text-align: center;
    border-top: 1px solid rgba(54, 79, 107, 0.1);
    border-bottom: 1px solid rgba(54, 79, 107, 0.1);
}

.brand-title {
    color: var(--blue-sg4f);
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: -1px;
    margin-bottom: 50px;
}

.btn-container {
    display: flex;
    gap: 25px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-sg4f {
    background-color: var(--blue-sg4f);
    color: var(--white);
    text-decoration: none;
    padding: 20px 40px;
    border-radius: 2px; /* Look architectural */
    font-weight: bold;
    letter-spacing: 1px;
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    box-shadow: 0 10px 20px rgba(54, 79, 107, 0.15);
}

.btn-sg4f:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(54, 79, 107, 0.25);
    background-color: #25364a;
}

/* Grille des Piliers Moderne */
.pillar-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 100px 20px;
}

.pillar-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.pillar-card {
    padding: 40px;
    border: 1px solid #eee;
    background: var(--white);
    transition: all 0.4s ease;
    border-bottom: 6px solid var(--orange-sg4f);
}

.pillar-card:hover {
    border-color: var(--blue-sg4f);
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.05);
}

.pillar-card h3 {
    margin-top: 0;
    font-size: 1.5rem;
    color: var(--blue-sg4f);
    border-bottom: 2px solid var(--orange-sg4f);
    display: inline-block;
    margin-bottom: 20px;
}

/* Footer Strict */
footer {
    padding: 60px 20px;
    text-align: center;
    background: var(--white);
    color: var(--blue-sg4f);
    font-weight: bold;
    font-size: 0.9rem;
    border-top: 1px solid #eee;
}