:root {
    --primary: #d62828;
    --dark: #003049;
    --accent: #669bbc;
    --bg: #fdf0d5;
    --white: #ffffff;
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

body { 
    margin: 0; font-family: 'Segoe UI', Roboto, sans-serif; 
    background-color: #f4f4f4; color: var(--dark);
}

.container { max-width: 1200px; margin: 0 auto; padding: 20px; }

/* Navbar */
.navbar { background: var(--dark); color: white; padding: 15px 0; box-shadow: var(--shadow); }
.nav-container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; padding: 0 20px; align-items: center; }
.nav-logo { font-weight: bold; font-size: 1.3rem; cursor: pointer; }

/* Hub Header */
.hub-header { text-align: center; margin: 40px 0; }
.hub-header h1 { font-size: 2.5rem; margin-bottom: 10px; color: var(--dark); }

/* Grid System */
.hub-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); 
    gap: 25px; 
    padding-bottom: 50px;
}

/* Engin Cards */
.engin-card {
    background: var(--white); border-radius: 15px; overflow: hidden;
    box-shadow: var(--shadow); cursor: pointer; transition: all 0.3s ease;
    border: 1px solid #eee; display: flex; flex-direction: column;
}

.engin-card:hover { transform: translateY(-10px); border-color: var(--primary); }

.card-icon { 
    background: var(--primary); height: 80px; display: flex; 
    align-items: center; justify-content: center; font-size: 2.5rem; 
}

.card-body { padding: 20px; flex-grow: 1; }
.card-body h3 { margin: 0 0 5px 0; font-size: 1.4rem; color: var(--dark); }
.fullname { font-size: 0.85rem; color: #666; height: 40px; overflow: hidden; margin-bottom: 15px; }

.card-footer { display: flex; justify-content: space-between; align-items: center; border-top: 1px solid #eee; pt: 15px; padding-top: 10px; }
.immat-badge { background: #333; color: #fff; padding: 3px 8px; border-radius: 4px; font-family: monospace; font-size: 0.9rem; }
.chassis-info { font-size: 0.75rem; color: var(--accent); font-weight: bold; }

/* Inventory View Styles */
.back-btn { 
    background: var(--dark); color: white; border: none; padding: 10px 20px; 
    border-radius: 5px; cursor: pointer; margin-bottom: 20px; font-weight: bold;
}
.cat-card { background: white; margin-bottom: 10px; border-radius: 8px; box-shadow: var(--shadow); }
.cat-header { padding: 20px; cursor: pointer; display: flex; justify-content: space-between; font-weight: bold; }
.cat-body { display: none; padding: 0 20px 20px 20px; border-top: 1px solid #f4f4f4; }
table { width: 100%; border-collapse: collapse; }
td { padding: 12px 5px; border-bottom: 1px solid #eee; }
.qty { color: var(--primary); font-weight: bold; width: 40px; }

/* Responsive */
@media (max-width: 600px) {
    .hub-grid { grid-template-columns: 1fr; }
    .hub-header h1 { font-size: 1.8rem; }
}

/* Header d'inventaire pro */
.inventory-header {
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-left: 8px solid var(--primary);
}

.vehicle-type { color: var(--primary); font-weight: bold; letter-spacing: 1px; }
.inventory-header h1 { margin: 5px 0 0 0; font-size: 1.8rem; color: var(--dark); }

.header-specs { display: flex; gap: 30px; }
.spec-item { display: flex; flex-direction: column; text-align: right; }
.spec-item small { color: #888; font-size: 0.7rem; font-weight: bold; }
.spec-item strong { color: var(--dark); font-family: 'Monaco', monospace; }

/* Accordéons et Tableaux */
.cat-title { display: flex; align-items: center; gap: 10px; }
.chevron { transition: transform 0.3s; color: #ccc; }
.cat-header:hover .chevron { color: var(--primary); }

.subcategory-title {
    background: #f8f9fa;
    padding: 8px 15px;
    border-radius: 4px;
    color: var(--accent);
    font-size: 0.9rem;
    margin: 20px 0 10px 0;
}

table { margin-bottom: 10px; }
th { font-size: 0.75rem; border-bottom: 2px solid #f1f1f1; color: #999; }
.qty-cell span {
    background: #f1f1f1;
    color: var(--dark);
    padding: 4px 8px;
    border-radius: 4px;
    font-weight: bold;
}
.element-name { font-weight: 500; }
.obs-cell { font-style: italic; color: #666; font-size: 0.85rem; }
.none { color: #ddd; }

/* Responsive Header */
@media (max-width: 768px) {
    .inventory-header { flex-direction: column; align-items: flex-start; gap: 20px; }
    .header-specs { text-align: left; gap: 15px; width: 100%; border-top: 1px solid #eee; padding-top: 15px; }
    .spec-item { text-align: left; }
}