:root {
    --primary-dark: #064e3b;
    --primary-main: #059669;
    --primary-light: #34d399;
    --accent-coral: #f43f5e;
    --accent-coral-hover: #e11d48;
    --bg-body: #f8fafc;
    --card-bg: #ffffff;
    --text-dark: #0f172a;
    --text-muted: #475569;
    --border-color: #e2e8f0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

body {
    background-color: var(--bg-body);
    color: var(--text-muted);
    line-height: 1.6;
}

/* En-tête globale et navigation */
.nav-bar {
    background-color: var(--primary-dark);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-bar a {
    color: #ffffff;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: color 0.2s;
}

.nav-bar a:hover {
    color: var(--primary-light);
}

.nav-tag {
    color: var(--primary-light);
    font-weight: 600;
    font-size: 0.9rem;
}

header {
    background: linear-gradient(135deg, #064e3b 0%, #047857 50%, #0f766e 100%);
    color: #ffffff;
    padding: 3.5rem 2rem;
    text-align: center;
    box-shadow: inset 0 -4px 10px rgba(0, 0, 0, 0.1);
}

header h1 {
    font-size: 2.3rem;
    margin-bottom: 0.8rem;
    color: #ffffff;
    font-weight: 800;
}

header p {
    color: #d1fae5;
    max-width: 720px;
    margin: 0 auto;
    font-size: 1.05rem;
}

/* Barre de navigation entre univers */
.sub-nav-bar {
    background-color: #064e3b;
    padding: 0.9rem 1rem;
    display: flex;
    justify-content: center;
    gap: 1.2rem;
    flex-wrap: wrap;
    position: sticky;
    top: 0;
    z-index: 999;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
    border-bottom: 3px solid var(--accent-coral);
}

.sub-nav-bar a {
    color: #f1f5f9;
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 600;
    padding: 0.45rem 1.1rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    transition: all 0.2s ease-in-out;
    white-space: nowrap;
}

.sub-nav-bar a:hover,
.sub-nav-bar a.active {
    background-color: var(--accent-coral);
    color: #ffffff;
    transform: translateY(-1px);
}

/* Grilles et conteneurs */
.container {
    max-width: 1250px;
    margin: 0 auto;
    padding: 3.5rem 1.5rem;
}

.category-title {
    font-size: 1.7rem;
    color: var(--primary-dark);
    margin-bottom: 2rem;
    border-left: 6px solid var(--accent-coral);
    padding-left: 0.85rem;
    display: flex;
    align-items: center;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.8rem;
}

/* Carte produit */
.product-card {
    background: var(--card-bg);
    border-radius: 14px;
    padding: 1.4rem;
    text-align: center;
    box-shadow: 0 3px 6px rgba(0,0,0,0.04);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 20px -3px rgba(6, 78, 59, 0.12);
    border-color: var(--primary-light);
}

.product-img {
    width: 100%;
    height: 190px;
    object-fit: contain;
    margin-bottom: 1rem;
    background-color: #f8fafc;
    border-radius: 8px;
    padding: 0.5rem;
}

.product-card h4 {
    font-size: 1rem;
    color: var(--text-dark);
    margin-bottom: 1.2rem;
    min-height: 2.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1.35;
}

.btn {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent-coral), var(--accent-coral-hover));
    color: white;
    padding: 0.65rem 1.2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.88rem;
    box-shadow: 0 3px 6px rgba(244, 63, 94, 0.25);
    transition: all 0.2s ease-in-out;
}

.btn:hover {
    background: linear-gradient(135deg, var(--primary-main), var(--primary-dark));
    box-shadow: 0 4px 10px rgba(5, 150, 105, 0.3);
    color: #ffffff;
    transform: translateY(-1px);
}

/* Section Portails du Hub */
.hub-portals {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.portal-card {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    padding: 2.2rem;
    text-align: center;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.portal-card:hover {
    border-color: var(--primary-main);
    transform: translateY(-6px);
    box-shadow: 0 15px 30px rgba(6, 78, 59, 0.12);
}

.portal-card .icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.portal-card h3 {
    font-size: 1.45rem;
    color: var(--primary-dark);
    margin-bottom: 0.8rem;
}

.portal-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

/* Pied de page */
footer {
    background-color: var(--primary-dark);
    color: #cbd5e1;
    text-align: center;
    padding: 2.5rem 1rem;
    margin-top: 4rem;
    border-top: 4px solid var(--accent-coral);
    font-size: 0.95rem;
}