/* =====================================================
   Flex HACCP Slagerij - Main Stylesheet
   Dark/Light Mode, Responsive, Tablet-First
   ===================================================== */

/* ---- Lucide Icon Font Override ---- */
/* The lucide-static CDN uses "icon-" prefix, but our HTML uses "lucide-" prefix */
[class*=" lucide-"],
[class^="lucide-"] {
    font-family: lucide !important;
    font-size: inherit;
    font-style: normal;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ---- CSS Variables ---- */
:root {
    /* Dark mode (default) */
    --bg-primary: #0f1117;
    --bg-secondary: #1a1b26;
    --bg-card: #1e1f2e;
    --bg-input: #252636;
    --bg-hover: #2a2b3d;
    --bg-sidebar: #141520;
    --text-primary: #e1e1e6;
    --text-secondary: #a0a0b0;
    --text-muted: #6b6b80;
    --border-color: #2d2d3f;
    --accent: #4fc3f7;
    --accent-hover: #81d4fa;
    --accent-rgb: 79, 195, 247;
    --success: #4caf50;
    --success-bg: rgba(76,175,80,0.12);
    --warning: #ff9800;
    --warning-bg: rgba(255,152,0,0.12);
    --danger: #f44336;
    --danger-bg: rgba(244,67,54,0.12);
    --info: #2196f3;
    --info-bg: rgba(33,150,243,0.12);
    --shadow: 0 4px 24px rgba(0,0,0,0.3);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.2);
    --radius: 10px;
    --radius-sm: 6px;
    --radius-lg: 16px;
    --sidebar-width: 260px;
    --header-height: 60px;
    --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    --transition: all 0.2s ease;
}

/* Light Mode */
[data-theme="light"] {
    --bg-primary: #f0f2f5;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-input: #f5f5f5;
    --bg-hover: #e8e8ec;
    --bg-sidebar: #1e1f2e;
    --text-primary: #1a1a2e;
    --text-secondary: #555;
    --text-muted: #999;
    --border-color: #e0e0e0;
    --shadow: 0 4px 24px rgba(0,0,0,0.08);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 15px; scroll-behavior: smooth; }
body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }
img { max-width: 100%; height: auto; }
table { width: 100%; border-collapse: collapse; }

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

/* ---- Sidebar ---- */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-sidebar);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 1000;
    overflow-y: auto;
    transition: transform 0.3s ease;
    border-right: 1px solid rgba(255,255,255,0.05);
}

.sidebar-brand {
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    min-height: var(--header-height);
}

.sidebar-brand-icon { font-size: 28px; }
.sidebar-brand h2 {
    font-size: 16px;
    color: #fff;
    font-weight: 700;
    white-space: nowrap;
}
.sidebar-brand small { display: block; font-size: 11px; color: #888; font-weight: 400; }

.sidebar-nav { padding: 12px 0; }
.sidebar-section { padding: 8px 20px 4px; font-size: 11px; text-transform: uppercase; letter-spacing: 1px; color: #555; font-weight: 600; }

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 20px;
    color: #9ca3af;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.nav-link:hover {
    background: rgba(79,195,247,0.08);
    color: #e1e1e6;
    border-left-color: rgba(79,195,247,0.3);
}

.nav-link.active {
    background: rgba(79,195,247,0.12);
    color: var(--accent);
    border-left-color: var(--accent);
}

.nav-link .nav-icon { font-size: 18px; width: 24px; text-align: center; flex-shrink: 0; }
.nav-link .nav-badge {
    margin-left: auto;
    background: var(--danger);
    color: white;
    font-size: 11px;
    padding: 2px 7px;
    border-radius: 10px;
    font-weight: 600;
}

/* ---- Main Content ---- */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
}

/* ---- Header ---- */
.top-header {
    position: sticky;
    top: 0;
    z-index: 900;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    backdrop-filter: blur(12px);
}

.header-left { display: flex; align-items: center; gap: 16px; }
.header-right { display: flex; align-items: center; gap: 12px; }

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 24px;
    cursor: pointer;
    padding: 4px;
}

.search-box {
    position: relative;
    width: 280px;
}

.search-box input {
    width: 100%;
    padding: 8px 16px 8px 36px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
}

.search-box input:focus { outline: none; border-color: var(--accent); }
.search-box .search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 14px;
}

.header-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 20px;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
}

.header-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.header-btn .badge-dot {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 8px;
    height: 8px;
    background: var(--danger);
    border-radius: 50%;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
}

.user-menu:hover { background: var(--bg-hover); }
.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 13px;
    color: #1a1a2e;
}

.user-info { line-height: 1.2; }
.user-info .name { font-size: 13px; font-weight: 600; }
.user-info .role { font-size: 11px; color: var(--text-muted); }

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

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}

.page-header h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--accent); }

/* ---- Cards ---- */
.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h3 { font-size: 16px; font-weight: 600; }
.card-body { padding: 20px; }
.card-footer { padding: 12px 20px; border-top: 1px solid var(--border-color); }

/* Dashboard Cards */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: var(--transition);
}

.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }

.stat-card .stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}

.stat-card .stat-icon.blue { background: rgba(79,195,247,0.12); }
.stat-card .stat-icon.green { background: var(--success-bg); }
.stat-card .stat-icon.orange { background: var(--warning-bg); }
.stat-card .stat-icon.red { background: var(--danger-bg); }

.stat-card .stat-info h4 { font-size: 24px; font-weight: 700; line-height: 1; }
.stat-card .stat-info p { font-size: 13px; color: var(--text-secondary); margin-top: 4px; }

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
    line-height: 1.4;
}

.btn-primary { background: var(--accent); color: #1a1a2e; }
.btn-primary:hover { background: var(--accent-hover); color: #1a1a2e; transform: translateY(-1px); }
.btn-success { background: var(--success); color: white; }
.btn-success:hover { filter: brightness(1.1); }
.btn-warning { background: var(--warning); color: #1a1a2e; }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { filter: brightness(1.1); }
.btn-secondary { background: var(--bg-hover); color: var(--text-primary); border: 1px solid var(--border-color); }
.btn-secondary:hover { background: var(--bg-input); }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-lg { padding: 14px 28px; font-size: 16px; }
.btn-block { width: 100%; justify-content: center; }
.btn-icon { padding: 8px; min-width: 36px; justify-content: center; }

/* Tablet-friendly large buttons */
.btn-tablet {
    padding: 14px 24px;
    font-size: 16px;
    min-height: 48px;
}

/* Quick action buttons */
.quick-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
    margin-bottom: 24px;
}

.quick-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 13px;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    min-height: 80px;
    justify-content: center;
}

.quick-btn:hover {
    border-color: var(--accent);
    background: rgba(79,195,247,0.06);
    color: var(--accent);
    transform: translateY(-2px);
}

.quick-btn .quick-icon { font-size: 24px; }

/* ---- Tables ---- */
.table-responsive { overflow-x: auto; -webkit-overflow-scrolling: touch; }

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead th {
    padding: 12px 16px;
    text-align: left;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    background: var(--bg-input);
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

.data-table tbody td {
    padding: 12px 16px;
    font-size: 14px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.data-table tbody tr:hover { background: var(--bg-hover); }
.data-table tbody tr:last-child td { border-bottom: none; }

/* ---- Forms ---- */
.form-group { margin-bottom: 16px; }
.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-group label .required { color: var(--danger); }

.form-control {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 15px;
    font-family: inherit;
    transition: var(--transition);
    min-height: 44px;
}

.form-control:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.15); }
.form-control::placeholder { color: var(--text-muted); }

textarea.form-control { min-height: 100px; resize: vertical; }

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23888' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.form-check {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    cursor: pointer;
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
    width: 20px;
    height: 20px;
    accent-color: var(--accent);
    cursor: pointer;
}

.form-check label { margin: 0; font-size: 14px; cursor: pointer; }

/* Good/Bad toggle buttons */
.status-toggle {
    display: flex;
    gap: 8px;
}

.status-toggle .toggle-btn {
    flex: 1;
    padding: 10px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-input);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    transition: var(--transition);
    min-height: 44px;
}

.status-toggle .toggle-btn.good.selected {
    background: var(--success-bg);
    border-color: var(--success);
    color: var(--success);
}

.status-toggle .toggle-btn.bad.selected {
    background: var(--danger-bg);
    border-color: var(--danger);
    color: var(--danger);
}

/* ---- Badges ---- */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
}

.badge-success { background: var(--success-bg); color: var(--success); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-info { background: var(--info-bg); color: var(--info); }
.badge-secondary { background: var(--bg-hover); color: var(--text-secondary); }

/* ---- Alerts ---- */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success { background: var(--success-bg); border: 1px solid rgba(76,175,80,0.3); color: var(--success); }
.alert-warning { background: var(--warning-bg); border: 1px solid rgba(255,152,0,0.3); color: var(--warning); }
.alert-danger { background: var(--danger-bg); border: 1px solid rgba(244,67,54,0.3); color: var(--danger); }
.alert-info { background: var(--info-bg); border: 1px solid rgba(33,150,243,0.3); color: var(--info); }

/* ---- Modals ---- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    backdrop-filter: blur(4px);
}

.modal-overlay.show { display: flex; }

.modal {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 540px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 { font-size: 18px; }
.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 22px;
    cursor: pointer;
    padding: 4px;
}

.modal-body { padding: 20px; }
.modal-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

/* ---- Toast Notifications ---- */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 3000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 14px 20px;
    border-radius: var(--radius);
    color: white;
    font-size: 14px;
    font-weight: 500;
    min-width: 280px;
    max-width: 400px;
    box-shadow: var(--shadow);
    animation: slideIn 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
}

.toast-success { background: #2e7d32; }
.toast-error { background: #c62828; }
.toast-warning { background: #e65100; }
.toast-info { background: #1565c0; }

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* ---- Pagination ---- */
.pagination-nav { display: flex; justify-content: center; padding: 16px 0; }
.pagination { display: flex; list-style: none; gap: 4px; }
.page-link {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 8px;
    border-radius: var(--radius-sm);
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 14px;
    text-decoration: none;
    transition: var(--transition);
}

.page-link:hover { background: var(--accent); color: #1a1a2e; }
.page-link.active { background: var(--accent); color: #1a1a2e; font-weight: 700; }

/* ---- Filters ---- */
.filters-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 0;
    flex-wrap: wrap;
}

.filter-input {
    padding: 8px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 14px;
    min-height: 40px;
}

.filter-input:focus { outline: none; border-color: var(--accent); }

/* ---- Empty State ---- */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-state .empty-icon { font-size: 48px; margin-bottom: 12px; }
.empty-state h3 { font-size: 18px; margin-bottom: 8px; color: var(--text-secondary); }
.empty-state p { font-size: 14px; margin-bottom: 20px; }

/* ---- Login Page ---- */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0f1117 0%, #1a1b26 50%, #0f3460 100%);
    padding: 20px;
}

.login-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.login-card .logo { text-align: center; margin-bottom: 30px; }
.login-card .logo h1 { font-size: 24px; color: var(--accent); margin-bottom: 4px; }
.login-card .logo p { color: var(--text-muted); font-size: 14px; }

/* ---- Signature Pad ---- */
.signature-pad {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-input);
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 14px;
    cursor: crosshair;
}

/* ---- Photo Upload ---- */
.photo-upload {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.photo-upload:hover { border-color: var(--accent); background: rgba(var(--accent-rgb), 0.05); }
.photo-upload .upload-icon { font-size: 32px; margin-bottom: 8px; }
.photo-upload p { font-size: 13px; color: var(--text-muted); }

/* ---- Print Styles ---- */
@media print {
    .sidebar, .top-header, .no-print { display: none !important; }
    .main-content { margin-left: 0 !important; }
    .page-content { padding: 0 !important; }
    body { background: white; color: black; }
    .card { box-shadow: none; border: 1px solid #ddd; }
    .data-table th { background: #f5f5f5; }
}

/* ---- Responsive ---- */
/* Mobile sidebar overlay */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 999;
}

/* Tablet (<= 1024px) */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open { transform: translateX(0); }
    .sidebar-overlay.show { display: block; }

    .main-content { margin-left: 0; }
    .menu-toggle { display: block; }

    .page-content { padding: 16px; }

    .search-box { width: 200px; }
}

/* Phone (<= 640px) */
@media (max-width: 640px) {
    html { font-size: 14px; }

    .page-header { flex-direction: column; align-items: flex-start; }
    .page-header .btn { width: 100%; justify-content: center; }

    .dashboard-grid { grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }

    .search-box { display: none; }

    .quick-actions { grid-template-columns: repeat(2, 1fr); }

    .form-row { grid-template-columns: 1fr; }

    .user-info { display: none; }

    .filters-bar { flex-direction: column; align-items: stretch; }
    .filter-input { width: 100%; }

    .top-header { padding: 0 12px; }
}

/* ---- Utility ---- */
.text-success { color: var(--success) !important; }
.text-warning { color: var(--warning) !important; }
.text-danger { color: var(--danger) !important; }
.text-info { color: var(--info) !important; }
.text-muted { color: var(--text-muted) !important; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-small { font-size: 13px; }
.fw-bold { font-weight: 700; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.p-2 { padding: 16px; }
.p-3 { padding: 24px; }
.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.w-full { width: 100%; }
.hidden { display: none; }

/* Color-coded rows */
tr.row-success { background: var(--success-bg) !important; }
tr.row-warning { background: var(--warning-bg) !important; }
tr.row-danger { background: var(--danger-bg) !important; }

/* Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #333; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #555; }

/* ---- Grid layouts ---- */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ---- Loading spinner ---- */
.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 4000;
}