/* --- 1. Variables de Couleur & Configuration Globale --- */
:root {
    /* Couleurs de base du thème (bleu foncé) */
    --color-bg: #1A202C;          /* Fond de la page (très sombre) */
    --color-bg-card: #2D3748;     /* Fond des cartes (un peu plus clair) */
    
    /* Couleurs de texte */
    --color-text: #E2E8F0;        /* Texte principal (blanc cassé) */
    --color-text-light: #A0AEC0;  /* Texte secondaire (gris) */

    /* Couleurs d'accentuation */
    --color-primary: #3B82F6;     /* Un bleu vif qui ressort sur le fond sombre */
    --color-primary-dark: #2563EB;
    --color-success: #10B981;
    --color-success-dark: #059669;
    --color-danger: #EF4444;
    --color-danger-dark: #DC2626;

    /* Bordures et Formes */
    --border-color: #4A5568;      /* Une bordure visible sur le fond sombre */
    --border-radius-card: 16px;   /* Formes plus arrondies pour les cartes */
    --border-radius-btn: 30px;    /* Formes très arrondies (pilule) pour les boutons */
    --shadow: 0 4px 12px rgba(0,0,0,0.3);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    margin: 0;
    background-color: var(--color-bg);
    color: var(--color-text);
}

/* --- 2. En-tête (Header / Navbar) --- */
header {
    background-color: var(--color-bg-card);
    color: var(--color-text);
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    height: 65px;
    border-bottom: 1px solid var(--border-color);
}
header h1 { margin: 0; font-size: 1.5rem; color: var(--color-primary); }
header nav { display: flex; align-items: center; }
header nav p { margin: 0 1.5rem 0 0; color: var(--color-text-light); }
header nav a {
    color: var(--color-text-light);
    text-decoration: none;
    margin-left: 1.5rem;
    padding: 0.5rem 0;
    font-weight: 500;
    border-bottom: 3px solid transparent;
    transition: all 0.2s;
}
header nav a:hover { color: var(--color-text); }
header nav a.active {
    color: var(--color-text);
    border-bottom-color: var(--color-primary);
    font-weight: 700;
}

/* --- 3. Conteneur principal & Cartes (Widgets) --- */
.container {
    max-width: 1300px;
    margin: 2rem auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1.5rem;
}
.login-form {
    max-width: 400px;
    margin: 5rem auto;
    padding: 2.5rem;
    background: var(--color-bg-card);
    border-radius: var(--border-radius-card);
    box-shadow: var(--shadow);
}
.card {
    background-color: var(--color-bg-card);
    border-radius: var(--border-radius-card);
    box-shadow: var(--shadow);
    padding: 1.5rem 2rem;
    grid-column: span 1; 
}
.card-full-width { grid-column: 1 / -1; }
.card h2 {
    margin-top: 0;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--color-text);
}

/* --- 4. Formulaires & Boutons --- */
.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; margin-bottom: 0.5rem; font-weight: 500; color: var(--color-text-light); }
.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="date"],
.form-group input[type="datetime-local"],
select {
    width: 100%;
    padding: 0.85rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-sizing: border-box; 
    font-size: 1rem;
    background-color: var(--color-bg);
    color: var(--color-text);
    transition: border-color 0.2s, box-shadow 0.2s;
}
/* Style pour l'icône de calendrier */
.form-group input::-webkit-calendar-picker-indicator {
    filter: invert(1);
}
.form-group input:focus, select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
}

.btn, .btn-filter {
    display: inline-block;
    width: auto;
    padding: 0.85rem 1.75rem;
    border: none;
    border-radius: var(--border-radius-btn);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
    background-color: var(--color-primary);
    color: white;
}
.btn:hover, .btn-filter:hover { background-color: var(--color-primary-dark); }
.btn:active, .btn-filter:active { transform: scale(0.98); }

.btn-full-width { width: 100%; }
.btn-entree { background-color: var(--color-success); }
.btn-entree:hover { background-color: var(--color-success-dark); }
.btn-sortie { background-color: var(--color-danger); }
.btn-sortie:hover { background-color: var(--color-danger-dark); }

.btn-action {
    padding: 0.4rem 1rem; font-size: 0.85rem;
    border-radius: var(--border-radius-btn);
    background-color: var(--color-primary);
    color: white;
}
.btn-action-add {
    background-color: var(--color-success); color: white;
    padding: 0.6rem 1.2rem; font-size: 0.9rem; font-weight: 500; text-decoration: none;
    border-radius: var(--border-radius-btn);
}
.btn-action-add:hover { background-color: var(--color-success-dark); }
.btn-danger { background-color: var(--color-danger); }
.btn-danger:hover { background-color: var(--color-danger-dark); }

/* --- 5. Tableaux --- */
.table-responsive { width: 100%; overflow-x: auto; }
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1.5rem;
}
table th, table td {
    padding: 0.9rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}
table th {
    background-color: #374151;
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    color: var(--color-text-light);
}
table tr:hover { background-color: #374151; }
.actions-cell { display: flex; gap: 0.5rem; }

/* --- 6. Éléments Spécifiques (Statut, Filtres, Messages) --- */
.statut-box {
    background-color: var(--color-bg);
    border-left: 5px solid var(--color-primary);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: 8px;
}
.statut-box p { margin: 0; font-size: 1.1rem; font-weight: 500; }

.message-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
    border: 1px solid var(--color-success);
    padding: 0.75rem 1.25rem; border-radius: var(--border-radius-card); text-align: center;
    margin-bottom: 1rem;
}
.error-message {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--color-danger);
    border: 1px solid var(--color-danger);
    padding: 0.75rem 1.25rem; border-radius: var(--border-radius-card); text-align: center;
    margin-bottom: 1rem;
}

/* Filtres */
.filter-form {
    display: flex; flex-wrap: wrap; gap: 1rem;
    align-items: flex-end; 
    margin-bottom: 1rem;
}
.filter-form .form-group { margin-bottom: 0; flex: 1; }
.form-actions { display: flex; gap: 0.5rem; align-items: center; }
.btn-reset { color: var(--color-text-light); text-decoration: none; font-size: 0.9rem; }
.btn-reset:hover { text-decoration: underline; }

.quick-filters { margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--border-color); }
.quick-filters span { font-weight: 500; margin-right: 0.5rem; }
.quick-filters a { text-decoration: none; margin-right: 1rem; color: var(--color-primary); }
.quick-filters a:hover { text-decoration: underline; }
.quick-filters a.active {
    font-weight: 700;
    text-decoration: underline;
    color: var(--color-text);
}

.action-header {
    display: flex; justify-content: space-between; align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.75rem;
    margin-bottom: 1.5rem;
}
.action-header h2 { border-bottom: none; padding-bottom: 0; }

/* --- 7. Styles pour les Onglets (Tabs) --- */
.tab-nav {
    display: flex;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 1.5rem;
}
.tab-link {
    font-size: 1rem;
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    border: none;
    background-color: transparent;
    color: var(--color-text-light);
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.2s ease;
    margin-bottom: -2px;
}
.tab-link:hover { color: var(--color-text); }
.tab-link.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}
.tab-content { display: none; }
.tab-content.active { display: block; }

/* --- 8. Lien "Retour" --- */
.back-link {
    display: inline-block;
    margin-bottom: 1.5rem;
    text-decoration: none;
    color: var(--color-primary);
    font-weight: 500;
    font-size: 0.95rem;
}
.back-link:hover {
    text-decoration: underline;
    color: var(--color-primary-dark);
}