/* ========================================
   SNEL IMMO - Design System
   Palette: Bleu marine SNEL + Rouge accent
   ======================================== */

:root {
    --primary: #1a3a5c;
    --primary-light: #234b73;
    --primary-dark: #0d2137;
    --accent: #e94560;
    --accent-light: #f0627a;
    --success: #27ae60;
    --warning: #f39c12;
    --danger: #e74c3c;
    --info: #3498db;
    --dark: #2c3e50;
    --light: #f8f9fa;
    --gray-100: #f0f2f5;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-600: #6c757d;
    --sidebar-width: 260px;
    --sidebar-collapsed: 70px;
    --topbar-height: 60px;
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

/* ========== RESET ========== */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Segoe UI', system-ui, -apple-system, sans-serif; background: var(--gray-100); color: #333; overflow-x: hidden; }
a { text-decoration: none; color: var(--primary); }
a:hover { color: var(--primary-light); }

/* ========== LAYOUT ========== */
.app-wrapper { display: flex; min-height: 100vh; }

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--primary);
    color: white;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    z-index: 1000;
    display: flex; flex-direction: column;
    transition: var(--transition);
    overflow-y: auto; overflow-x: hidden;
}
.sidebar.collapsed { width: var(--sidebar-collapsed); }
.sidebar.collapsed .sidebar-brand span,
.sidebar.collapsed .nav-section,
.sidebar.collapsed .nav-link span,
.sidebar.collapsed .sidebar-footer { display: none; }
.sidebar.collapsed .nav-link { justify-content: center; padding: 12px; }
.sidebar.collapsed .nav-link i { margin: 0; font-size: 18px; }

.sidebar-header { padding: 16px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.sidebar-brand { color: white; font-size: 18px; font-weight: 700; display: flex; align-items: center; white-space: nowrap; }
.sidebar-brand:hover { color: rgba(255,255,255,0.8); }
.sidebar-brand i { font-size: 24px; color: var(--accent); }

.sidebar-body { flex: 1; padding: 8px 0; }
.sidebar-nav { list-style: none; padding: 0; }
.nav-section { 
    text-transform: uppercase; font-size: 11px; color: rgba(255,255,255,0.4); 
    padding: 12px 16px 4px; letter-spacing: 1px; font-weight: 600;
}
.nav-item { margin: 2px 8px; }
.nav-link {
    color: rgba(255,255,255,0.75); padding: 10px 16px; border-radius: var(--border-radius);
    display: flex; align-items: center; transition: var(--transition); white-space: nowrap;
}
.nav-link:hover { color: white; background: rgba(255,255,255,0.1); }
.nav-link.active { color: white; background: var(--accent); }
.nav-link i { width: 20px; text-align: center; }

.sidebar-footer { padding: 8px; border-top: 1px solid rgba(255,255,255,0.1); }

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    transition: var(--transition);
    display: flex; flex-direction: column;
}
.main-content.expanded { margin-left: var(--sidebar-collapsed); }

/* Topbar */
.topbar {
    height: var(--topbar-height);
    background: white;
    border-bottom: 1px solid var(--gray-300);
    display: flex; align-items: center;
    padding: 0 20px;
    position: sticky; top: 0;
    z-index: 999;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}
.sidebar-toggle { color: var(--dark); font-size: 20px; padding: 4px 8px; }
.sidebar-toggle:hover { color: var(--accent); }
.sidebar-toggle:focus { box-shadow: none; }

.notification-btn { position: relative; color: var(--gray-600); font-size: 18px; }
.notification-btn:hover { color: var(--dark); }
.notification-btn .badge { 
    position: absolute; top: 0; right: -2px; font-size: 10px; padding: 3px 5px;
}

.avatar-sm {
    width: 36px; height: 36px; border-radius: 50%;
    background: var(--accent); color: white;
    display: flex; align-items: center; justify-content: center;
    font-size: 14px; font-weight: 700;
}

/* Page Content */
.page-content { padding: 24px; flex: 1; }

/* ========== COMPONENTS ========== */

/* Cards */
.card {
    border: none;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    margin-bottom: 20px;
}
.card-header {
    background: white;
    border-bottom: 1px solid var(--gray-200);
    border-radius: 12px 12px 0 0 !important;
    padding: 16px 20px;
    font-weight: 600;
}
.card-body { padding: 20px; }

/* Stat cards */
.stat-card {
    background: white;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    display: flex; align-items: center; gap: 16px;
    transition: transform 0.2s;
}
.stat-card:hover { transform: translateY(-2px); }
.stat-icon {
    width: 56px; height: 56px; border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-size: 24px; color: white;
}
.stat-info h3 { font-size: 28px; font-weight: 700; margin: 0; }
.stat-info p { margin: 0; color: var(--gray-600); font-size: 14px; }

.stat-primary .stat-icon { background: var(--primary); }
.stat-success .stat-icon { background: var(--success); }
.stat-warning .stat-icon { background: var(--warning); }
.stat-danger .stat-icon { background: var(--danger); }
.stat-info .stat-icon { background: var(--info); }

/* Buttons */
.btn { border-radius: var(--border-radius); font-weight: 500; padding: 8px 16px; transition: var(--transition); }
.btn-primary { background: var(--primary); border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-light); border-color: var(--primary-light); }
.btn-danger { background: var(--danger); border-color: var(--danger); }
.btn-success { background: var(--success); border-color: var(--success); }

/* Forms */
.form-label { font-weight: 500; color: var(--dark); margin-bottom: 6px; }
.form-control, .form-select { border-radius: var(--border-radius); border-color: var(--gray-300); padding: 8px 12px; }
.form-control:focus, .form-select:focus { border-color: var(--primary-light); box-shadow: 0 0 0 0.2rem rgba(26,58,92,0.15); }
.required:after { content: ' *'; color: var(--danger); }

/* Badges */
.badge { font-weight: 500; padding: 5px 10px; border-radius: 6px; }
.bg-primary { background: var(--primary) !important; }
.bg-success { background: var(--success) !important; }
.bg-warning { background: var(--warning) !important; color: #333 !important; }
.bg-danger { background: var(--danger) !important; }
.bg-info { background: var(--info) !important; }
.bg-secondary { background: var(--gray-600) !important; }
.bg-dark { background: var(--dark) !important; }

/* Tables */
.table { font-size: 14px; }
.table th { font-weight: 600; color: var(--dark); background: var(--gray-100); border-bottom: 2px solid var(--gray-300); }
.table td { vertical-align: middle; }

/* DataTables custom */
.dataTables_wrapper .dt-buttons { margin-bottom: 10px; }
.dataTables_filter input { border-radius: var(--border-radius); border: 1px solid var(--gray-300); padding: 4px 10px; }

/* Breadcrumbs */
.breadcrumb { background: transparent; padding: 0; margin-bottom: 16px; }
.breadcrumb-item a { color: var(--gray-600); }
.breadcrumb-item.active { color: var(--dark); font-weight: 500; }

/* Alerts */
.alert { border: none; border-radius: var(--border-radius); font-size: 14px; }

/* Modals */
.modal-content { border: none; border-radius: 12px; }
.modal-header { background: var(--primary); color: white; border-radius: 12px 12px 0 0; }
.modal-header .btn-close { filter: brightness(0) invert(1); }

/* Charts */
.chart-container { position: relative; height: 300px; }

/* Loading */
.loading-overlay {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(255,255,255,0.8); z-index: 9999;
    display: flex; align-items: center; justify-content: center;
}
.spinner { width: 48px; height: 48px; border: 4px solid var(--gray-200); border-top-color: var(--accent);
    border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ========== LOGIN PAGE ========== */
.login-wrapper {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    display: flex; align-items: center; justify-content: center;
    padding: 20px;
}
.login-card {
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    width: 100%;
    max-width: 440px;
    overflow: hidden;
}
.login-header {
    background: var(--primary);
    color: white;
    padding: 30px;
    text-align: center;
}
.login-header h3 { margin: 0; font-weight: 700; }
.login-header p { margin: 8px 0 0; opacity: 0.8; font-size: 14px; }
.login-body { padding: 30px; }
.login-footer { 
    background: var(--gray-100); padding: 15px 30px; 
    text-align: center; font-size: 13px; color: var(--gray-600);
}

/* ========== RESPONSIVE ========== */
/* Overlay mobile quand sidebar ouverte */
.sidebar-overlay {
    display: none;
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5); z-index: 999;
}
.sidebar-overlay.show { display: block; }

@media (max-width: 992px) {
    .sidebar { 
        left: calc(-1 * var(--sidebar-width)); 
        width: var(--sidebar-width); 
        z-index: 1001;
        box-shadow: 4px 0 20px rgba(0,0,0,0.3);
    }
    .sidebar.mobile-open { left: 0; }
    .main-content { margin-left: 0 !important; }
    .main-content.expanded { margin-left: 0 !important; }
    .stat-card { margin-bottom: 16px; }
    .sidebar-toggle { display: inline-block !important; }
    .sidebar-header { padding: 12px; }
    .sidebar-brand { font-size: 16px; }
    .sidebar-brand i { font-size: 20px; }
    .nav-link { padding: 10px 12px; font-size: 14px; }
    .topbar .d-none.d-md-inline { display: inline !important; }
    .btn-group-sm .btn { padding: 4px 8px; font-size: 12px; }
}

@media (max-width: 768px) {
    .page-content { padding: 12px; }
    .topbar { padding: 0 10px; height: 50px; }
    .stat-info h3 { font-size: 20px; }
    .stat-info p { font-size: 12px; }
    .stat-icon { width: 44px; height: 44px; font-size: 20px; border-radius: 10px; }
    .stat-card { padding: 14px; gap: 10px; }
    .card-header { padding: 12px 14px; font-size: 14px; }
    .card-body { padding: 14px; }
    .table { font-size: 13px; }
    .table th, .table td { padding: 8px 10px; }
    h2 { font-size: 20px; }
    h3 { font-size: 16px; }
    .breadcrumb { font-size: 12px; }
    .btn { padding: 6px 12px; font-size: 13px; }
    .page-content { padding: 10px; }
    .modal-dialog { margin: 10px; }
    .chart-container { height: 220px; }
    /* Masquer colonnes secondaires sur mobile */
    .hide-mobile { display: none; }
    .login-card { max-width: 100%; margin: 10px; border-radius: 12px; }
    .login-header { padding: 20px; }
    .login-body { padding: 20px; }
}

@media (max-width: 576px) {
    .stat-card { padding: 12px; }
    .stat-icon { width: 36px; height: 36px; font-size: 16px; border-radius: 8px; }
    .stat-info h3 { font-size: 18px; }
    .sidebar { width: 85vw; left: -85vw; }
    .sidebar.mobile-open { left: 0; width: 85vw; }
    .sidebar.collapsed { width: 0 !important; }
    /* Pleine largeur sur très petit écran */
    .col-sm-6 { width: 100% !important; }
    .d-flex.justify-content-between { flex-direction: column; gap: 10px; }
    .d-flex.justify-content-between .btn { width: 100%; }
    .breadcrumb { display: none; }
}

/* ========== UTILITIES ========== */
.cursor-pointer { cursor: pointer; }
.text-primary { color: var(--primary) !important; }
.text-accent { color: var(--accent) !important; }
.fw-semibold { font-weight: 600; }