:root {
    --brand-dark: #1e293b;       /* Bleu nuit très sombre (Sérieux) */
    --brand-primary: #334155;    /* Gris bleuté (Professionnel) */
    --brand-accent: #10b981;     /* Vert émeraude (Action/Validation) */
    --brand-light: #f1f5f9;      /* Fond gris-bleuté plus marqué pour le contraste */
    --brand-border: #cbd5e1;     /* Bordure plus visible */
    /* Mapping pour compatibilité */
    --primary-color: var(--brand-dark);
    --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    --hover-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Montserrat', sans-serif;
    background-color: var(--brand-light);
    color: var(--brand-dark);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex: 1;
    padding-bottom: 3rem;
}

/* Navbar */
.navbar {
    background: #fff;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 700;
    color: var(--primary-color) !important;
}

.nav-link {
    font-weight: 500;
    color: #555 !important;
    transition: color 0.3s;
}

.nav-link:hover, .nav-link.active {
    color: var(--primary-color) !important;
}

/* Cartes & Conteneurs */
.card-custom {
    background: #fff;
    border: none;
    border-radius: 12px;
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
    overflow: hidden;
}

.card-custom:hover {
    transform: translateY(-5px);
    box-shadow: var(--hover-shadow);
}

.form-container {
    max-width: 800px;
    margin: 3rem auto;
    background: #fff;
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: var(--card-shadow);
}

/* Boutons */
.btn-primary-custom, .btn-primary-modern {
    background-color: var(--brand-dark);
    border-color: var(--brand-dark);
    color: white;
    border: none;
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary-custom:hover, .btn-primary-modern:hover {
    background-color: var(--brand-accent);
    border-color: var(--brand-accent);
    color: white;
    transform: translateY(-2px);
}

.btn-outline-custom {
    border: 2px solid var(--brand-dark);
    color: var(--brand-dark);
    background-color: transparent;
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-outline-custom:hover {
    background-color: var(--brand-dark);
    color: white;
}

/* Inputs */
.form-label {
    font-weight: 600;
    color: #334155; /* Slate 700 */
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
}

.form-control, .form-select {
    border-radius: 6px;
    padding: 12px 15px;
    border: 1px solid #e2e8f0;
    background-color: #f8fafc; /* Fond très légèrement bleuté pour le contraste */
    color: #1e293b;
    font-weight: 500;
    transition: all 0.3s ease;
    border-left: 3px solid #cbd5e1; /* Petite touche de couleur (Gris) */
}

.form-control:focus, .form-select:focus {
    background-color: #ffffff;
    border-color: #10b981;
    border-left-color: #10b981; /* Devient Vert Émeraude au focus */
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.1);
}

.section-title {
    position: relative;
    margin-bottom: 1.5rem;
    font-weight: 700;
    color: var(--brand-dark);
}

.section-title::after {
    content: '';
    display: block;
    width: 50px;
    height: 4px;
    background: var(--brand-accent);
    margin-top: 8px;
    border-radius: 2px;
}

/* Table Styling */
.table thead th {
    background-color: #f8fafc;
    color: #64748b;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--brand-border);
    padding: 1rem;
}

.table tbody td {
    vertical-align: middle;
    padding: 1rem;
    color: var(--brand-dark);
    border-bottom: 1px solid var(--brand-border);
}

/* Text colors */
.text-primary { color: var(--brand-accent) !important; }
.text-dark-blue { color: var(--brand-dark); }

/* Footer */
footer {
    background-color: #2c3e50;
    color: #ecf0f1;
    padding: 3rem 0 1.5rem;
    margin-top: auto;
}

footer a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s;
}

footer a:hover {
    color: #fff;
}