/* ============================================
   TORVO SPAIR - Global Stylesheet
   v2.1 — UI Audit Fixes Applied
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ----- CSS Variables ----- */
:root {
    --primary: #6c63ff;
    --primary-dark: #5a52d9;
    --primary-light: #1d4ed8;
    --accent: #48daf5;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;

    /* FIX #1: Unified sidebar width — was 260px here but 270px in .sidebar rule causing layout shift */
    --sidebar-w: 270px;
    --sidebar-bg: #0f0e1a;
    --sidebar-border: rgba(255,255,255,0.07);

    --bg-main: #f0f2f8;
    --bg-card: #ffffff;
    --bg-card2: #f8f9fd;

    --text-primary: #1e1b4b;
    --text-secondary: #64748b;
    /* FIX #6: Added missing --text-medium variable used in rfq_manager.php */
    --text-medium: #475569;
    --text-muted: #94a3b8;

    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;

    --transition: all 0.25s ease;
}

/* ----- Reset ----- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button, input, select, textarea { font-family: inherit; }

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

/* ----- Sidebar ----- */
.sidebar {
    /* FIX #1: Match width to --sidebar-w variable */
    width: var(--sidebar-w);
    background: #1e1b4b;
    color: #fff;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0;
    height: 100vh;
    z-index: 1000;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar-header {
    padding: 1.5rem; border-bottom: 1px solid rgba(255,255,255,0.05);
    background: #1e1b4b; flex-shrink: 0;
}

.sidebar-logo {
    display: flex; align-items: center; gap: 0.85rem; text-decoration: none;
}
.sidebar-logo i {
    font-size: 1.5rem; color: #fff;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    width: 42px; height: 42px; border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
}
.logo-text { display: flex; flex-direction: column; }
.logo-main { font-weight: 800; font-size: 1rem; color: #fff; letter-spacing: -0.5px; }
.logo-sub {
    font-size: 0.65rem; color: rgba(255,255,255,0.5); font-weight: 700;
    text-transform: uppercase; letter-spacing: 1px;
}

.sidebar-menu {
    flex: 1; overflow-y: auto; padding: 1rem 0;
    scrollbar-width: thin; scrollbar-color: rgba(255,255,255,0.1) transparent;
}
.sidebar-menu::-webkit-scrollbar { width: 5px; }
.sidebar-menu::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 10px; }

.sidebar-section { margin-bottom: 1.5rem; }
.sidebar-section-title {
    padding: 0 1.5rem; font-size: 0.68rem; font-weight: 800;
    color: rgba(255,255,255,0.3); text-transform: uppercase;
    letter-spacing: 1.2px; margin-bottom: 0.6rem;
}

.sidebar-nav-item {
    display: flex; align-items: center; gap: 0.85rem; padding: 0.72rem 1.5rem;
    color: rgba(255,255,255,0.7); text-decoration: none; font-size: 0.88rem; font-weight: 500;
    transition: all 0.2s; position: relative;
}
.sidebar-nav-item:hover { background: rgba(255,255,255,0.05); color: #fff; }
.sidebar-nav-item.active { background: rgba(255,255,255,0.08); color: #fff; font-weight: 600; }
.sidebar-nav-item.active::before {
    content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
    background: var(--primary); border-radius: 0 4px 4px 0;
}
.nav-icon { width: 20px; text-align: center; font-size: 1rem; opacity: 0.6; }
.sidebar-nav-item.active .nav-icon { opacity: 1; color: var(--primary); }

.nav-badge {
    margin-left: auto; background: var(--primary); color: #fff;
    font-size: 0.7rem; font-weight: 700; padding: 1px 7px; border-radius: 20px;
}

.sidebar-footer {
    padding: 1.25rem; background: #18153b; border-top: 1px solid rgba(255,255,255,0.05);
    flex-shrink: 0;
}

.profile-card {
    display: flex; align-items: center; gap: 0.85rem; padding: 0.75rem;
    background: rgba(255,255,255,0.04); border-radius: 12px; text-decoration: none;
    transition: background 0.2s;
}
.profile-card:hover { background: rgba(255,255,255,0.08); }
.profile-avatar {
    width: 38px; height: 38px; border-radius: 10px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex; align-items: center; justify-content: center;
    font-weight: 800; color: #fff; font-size: 1rem;
}
.profile-info { display: flex; flex-direction: column; overflow: hidden; }
.profile-name {
    font-size: 0.82rem; font-weight: 700; color: #fff;
    white-space: nowrap; text-overflow: ellipsis; overflow: hidden;
}
.profile-role { font-size: 0.65rem; color: rgba(255,255,255,0.4); font-weight: 600; }

/* ----- Main Content ----- */
.main-content {
    /* FIX #1: Now correctly references --sidebar-w which matches sidebar actual width */
    margin-left: var(--sidebar-w);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ----- Top Header ----- */
.top-header {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: 0 1.5rem;
    height: 65px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0; z-index: 50;
    box-shadow: var(--shadow-sm);
}
.header-left {
    display: flex; align-items: center; gap: 1rem;
}
.toggle-sidebar-btn {
    background: none; border: none;
    color: var(--text-secondary);
    cursor: pointer; font-size: 1.2rem;
    padding: 6px;
    border-radius: 8px;
    transition: var(--transition);
    display: none;
}
.toggle-sidebar-btn:hover { background: var(--bg-main); color: var(--primary); }
.page-title { font-size: 1.15rem; font-weight: 700; color: var(--text-primary); }
.page-breadcrumb { font-size: 0.8rem; color: var(--text-muted); display: flex; align-items: center; gap: 0.4rem; }
.header-right { display: flex; align-items: center; gap: 0.75rem; }

.header-search-bar {
    display: flex; align-items: center;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 0.4rem 0.9rem;
    gap: 0.5rem;
    width: 240px;
    transition: var(--transition);
}
.header-search-bar:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(108,99,255,0.1);
}
.header-search-bar i { color: var(--text-muted); font-size: 0.85rem; }
.header-search-bar input {
    border: none; background: transparent;
    font-size: 0.85rem; color: var(--text-primary);
    width: 100%; outline: none;
}
.header-search-bar input::placeholder { color: var(--text-muted); }

.icon-btn {
    width: 38px; height: 38px;
    display: flex; align-items: center; justify-content: center;
    border-radius: var(--radius-sm);
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    font-size: 0.9rem;
}
.icon-btn:hover { background: var(--primary); color: #fff; border-color: var(--primary); }
.icon-btn .notif-dot {
    position: absolute;
    top: 5px; right: 5px;
    width: 8px; height: 8px;
    background: var(--danger);
    border-radius: 50%;
    border: 2px solid var(--bg-card);
}

/* ----- Page Body ----- */
.page-body {
    padding: 1.5rem;
    flex: 1;
}

/* ----- Cards ----- */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}
.card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex; align-items: center; justify-content: space-between;
    gap: 1rem;
}
.card-title {
    font-size: 1rem; font-weight: 700; color: var(--text-primary);
    display: flex; align-items: center; gap: 0.6rem;
}
.card-title i { color: var(--primary); }
.card-body { padding: 1.5rem; }

/* ----- Stat Cards ----- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}
.stat-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    /* FIX #7: Ensure stat-card always flexes correctly even as <a> tag */
    display: flex; align-items: center; gap: 1.25rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
}
.stat-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 4px; height: 100%;
}
.stat-card.blue::before { background: linear-gradient(180deg, var(--primary), var(--accent)); }
.stat-card.green::before { background: linear-gradient(180deg, #22c55e, #4ade80); }
.stat-card.orange::before { background: linear-gradient(180deg, #f59e0b, #fb923c); }
.stat-card.red::before { background: linear-gradient(180deg, #ef4444, #fb7185); }
.stat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }

.stat-icon {
    width: 55px; height: 55px;
    border-radius: var(--radius-md);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}
.stat-card.blue .stat-icon { background: rgba(108,99,255,0.1); color: var(--primary); }
.stat-card.green .stat-icon { background: rgba(34,197,94,0.1); color: var(--success); }
.stat-card.orange .stat-icon { background: rgba(245,158,11,0.1); color: var(--warning); }
.stat-card.red .stat-icon { background: rgba(239,68,68,0.1); color: var(--danger); }

.stat-info .stat-value {
    font-size: 1.8rem; font-weight: 800;
    color: var(--text-primary); line-height: 1.1;
}
.stat-info .stat-label {
    font-size: 0.8rem; color: var(--text-muted);
    font-weight: 500; margin-top: 0.2rem;
}
.stat-info .stat-change {
    font-size: 0.75rem; font-weight: 600;
    margin-top: 0.3rem; display: flex; align-items: center; gap: 0.25rem;
}
.stat-info .stat-change.up { color: var(--success); }
.stat-info .stat-change.down { color: var(--danger); }

/* ----- Tables ----- */
.table-wrap { overflow-x: auto; }
.data-table {
    width: 100%; border-collapse: collapse;
    font-size: 0.875rem;
}
.data-table th {
    background: var(--bg-card2);
    padding: 0.85rem 1rem;
    text-align: left;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}
.data-table td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    vertical-align: middle;
}
.data-table tbody tr {
    transition: background 0.15s;
}
.data-table tbody tr:hover { background: rgba(108,99,255,0.03); }
.data-table tbody tr:last-child td { border-bottom: none; }

/* ----- Badges ----- */
.badge-pill {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 600;
}
.badge-success { background: rgba(34,197,94,0.12); color: #16a34a; }
.badge-danger  { background: rgba(239,68,68,0.12);  color: #dc2626; }
.badge-warning { background: rgba(245,158,11,0.12); color: #d97706; }
.badge-info    { background: rgba(59,130,246,0.12); color: #2563eb; }
.badge-gray    { background: rgba(100,116,139,0.12); color: #475569; }
.badge-primary { background: rgba(108,99,255,0.12); color: #5b21b6; }

/* ----- Buttons ----- */
.btn {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.6rem 1.15rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem; font-weight: 600;
    border: none; cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    font-family: 'Inter', sans-serif;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); box-shadow: 0 4px 15px rgba(108,99,255,0.35); transform: translateY(-1px); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #16a34a; box-shadow: 0 4px 12px rgba(34,197,94,0.35); transform: translateY(-1px); }
.btn-danger  { background: var(--danger); color: #fff; }
.btn-danger:hover  { background: #dc2626; box-shadow: 0 4px 12px rgba(239,68,68,0.35); transform: translateY(-1px); }
.btn-warning { background: var(--warning); color: #fff; }
.btn-warning:hover { background: #d97706; transform: translateY(-1px); }
.btn-outline {
    background: transparent;
    border: 1.5px solid var(--border-color);
    color: var(--text-secondary);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: rgba(108,99,255,0.05); }
/* FIX #3: Added missing .btn-accent class used in rfq_manager.php */
.btn-accent { background: var(--accent); color: #0f172a; }
.btn-accent:hover { background: #2dd4e8; box-shadow: 0 4px 12px rgba(72,218,245,0.35); transform: translateY(-1px); }
.btn-sm { padding: 0.4rem 0.85rem; font-size: 0.8rem; }
.btn-icon { padding: 0.5rem; gap: 0; }

/* ----- Forms ----- */
.form-group { margin-bottom: 1.25rem; }
.form-label {
    display: block;
    font-size: 0.8rem; font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase; letter-spacing: 0.4px;
}
.form-control {
    width: 100%;
    padding: 0.7rem 0.9rem;
    background: var(--bg-card);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: 'Inter', sans-serif;
    transition: var(--transition);
}
.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(108,99,255,0.1);
}
.form-control::placeholder { color: var(--text-muted); }
select.form-control { cursor: pointer; }
textarea.form-control { min-height: 100px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1rem; }

/* ----- Alert / Flash ----- */
.alert {
    padding: 0.85rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    display: flex; align-items: center; gap: 0.6rem;
    margin-bottom: 1rem;
    animation: fadeIn 0.3s ease;
}
@keyframes fadeIn { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }
.alert-success { background: rgba(34,197,94,0.1); border: 1px solid rgba(34,197,94,0.3); color: #16a34a; }
.alert-danger  { background: rgba(239,68,68,0.1);  border: 1px solid rgba(239,68,68,0.3);  color: #dc2626; }
.alert-warning { background: rgba(245,158,11,0.1); border: 1px solid rgba(245,158,11,0.3); color: #d97706; }
.alert-info    { background: rgba(59,130,246,0.1); border: 1px solid rgba(59,130,246,0.3); color: #2563eb; }

/* ----- Modal ----- */
.modal-overlay {
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(4px);
    z-index: 200;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    animation: fadeIn 0.2s ease;
}
/* FIX #2: Support both .show and .active class for modal-overlay (stock.php uses .active) */
.modal-overlay.show,
.modal-overlay.active { display: flex; }
.modal-box {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 0;
    width: 100%;
    max-width: 540px;
    /* FIX #10: Ensure modals always scroll on short viewports */
    max-height: 92vh;
    overflow-y: auto;
    box-shadow: 0 25px 60px rgba(0,0,0,0.25);
    animation: modalSlide 0.3s ease;
    display: flex;
    flex-direction: column;
}
.modal-box.modal-lg { max-width: 720px; }
@keyframes modalSlide { from { opacity: 0; transform: scale(0.94) translateY(20px); } to { opacity: 1; transform: scale(1) translateY(0); } }
.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex; align-items: center; justify-content: space-between;
    flex-shrink: 0;
}
.modal-title { font-size: 1rem; font-weight: 700; color: var(--text-primary); }
.modal-close {
    background: none; border: none;
    color: var(--text-muted); cursor: pointer;
    font-size: 1.1rem;
    padding: 4px; border-radius: 6px;
    transition: var(--transition);
}
.modal-close:hover { background: var(--bg-main); color: var(--danger); }
/* FIX #10: Modal body scrolls independently, header/footer stay pinned */
.modal-body { padding: 1.5rem; flex: 1; overflow-y: auto; }
.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex; justify-content: flex-end; gap: 0.75rem;
    flex-shrink: 0;
}

/* ----- Pagination ----- */
.pagination {
    display: flex; align-items: center; gap: 0.35rem;
    justify-content: center;
    padding: 1rem 0 0.5rem;
}
.page-link {
    width: 34px; height: 34px;
    display: flex; align-items: center; justify-content: center;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-secondary);
    font-size: 0.85rem; font-weight: 500;
    cursor: pointer; transition: var(--transition);
    text-decoration: none;
}
.page-link:hover, .page-link.active {
    background: var(--primary); color: #fff; border-color: var(--primary);
}
.page-link.disabled { opacity: 0.4; cursor: not-allowed; pointer-events: none; }

/* ----- Filter Bar ----- */
.filter-bar {
    display: flex; flex-wrap: wrap;
    gap: 0.75rem; align-items: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1rem 1.25rem;
    margin-bottom: 1.25rem;
    box-shadow: var(--shadow-sm);
}
.filter-bar .filter-group {
    display: flex; align-items: center; gap: 0.5rem;
    /* FIX #9: Changed flex:1 to explicit min/max to prevent squashing */
    flex: 1 1 150px;
    min-width: 140px;
}
/* FIX #9: Search group gets more space but still collapses */
.filter-bar .filter-group:first-child {
    flex: 2 1 200px;
    min-width: 180px;
}
.filter-bar select.form-control,
.filter-bar input.form-control {
    font-size: 0.85rem;
    padding: 0.55rem 0.8rem;
}

/* ----- Stock indicators ----- */
.stock-bar-wrap { display: flex; align-items: center; gap: 0.6rem; min-width: 120px; }
.stock-bar {
    flex: 1; height: 6px;
    background: var(--border-color);
    border-radius: 3px; overflow: hidden;
}
.stock-bar-fill { height: 100%; border-radius: 3px; transition: width 0.4s ease; }
.stock-ok   .stock-bar-fill { background: var(--success); }
.stock-low  .stock-bar-fill { background: var(--warning); }
.stock-zero .stock-bar-fill { background: var(--danger); }
.stock-qty { font-size: 0.8rem; font-weight: 600; white-space: nowrap; }

/* ----- Product image ----- */
.product-thumb {
    width: 42px; height: 42px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    border: 1px solid var(--border-color);
    background: var(--bg-card2);
    display: flex; align-items: center; justify-content: center;
    color: var(--text-muted); font-size: 1.1rem;
    flex-shrink: 0;
}
.product-thumb img { width: 100%; height: 100%; object-fit: cover; border-radius: var(--radius-sm); }

/* ----- Compatibility tags ----- */
.compat-tag {
    display: inline-flex; align-items: center; gap: 3px;
    padding: 2px 8px;
    background: rgba(108,99,255,0.08);
    color: var(--primary);
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
    border: 1px solid rgba(108,99,255,0.15);
    margin: 2px;
}

/* ----- Empty State ----- */
.empty-state {
    text-align: center; padding: 3rem 1.5rem;
}
.empty-state i { font-size: 3rem; color: var(--text-muted); margin-bottom: 1rem; opacity: 0.5; }
.empty-state h3 { font-size: 1.1rem; color: var(--text-primary); margin-bottom: 0.5rem; }
.empty-state p { color: var(--text-muted); font-size: 0.875rem; }

/* ----- Loading spinner ----- */
.spinner {
    width: 36px; height: 36px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    margin: 2rem auto;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ----- Tooltip ----- */
[data-tooltip] { position: relative; cursor: pointer; }
[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 125%; left: 50%;
    transform: translateX(-50%);
    background: #1e293b;
    color: #fff;
    font-size: 0.72rem;
    padding: 4px 8px;
    border-radius: 6px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
    z-index: 999;
}
[data-tooltip]:hover::after { opacity: 1; }

/* ----- Checkbox custom ----- */
.check-group {
    display: flex; flex-wrap: wrap; gap: 0.6rem;
}
.check-item {
    display: flex; align-items: center; gap: 0.4rem;
    padding: 0.45rem 0.85rem;
    border: 1.5px solid var(--border-color);
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.8rem; font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
    user-select: none;
}
.check-item input[type="checkbox"] { display: none; }
.check-item:has(input:checked),
.check-item.checked {
    border-color: var(--primary);
    background: rgba(108,99,255,0.08);
    color: var(--primary);
}
.check-item:hover { border-color: var(--primary); }

/* ----- Overlay panel for mobile sidebar ----- */
.sidebar-overlay {
    display: none;
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 99;
}

/* ----- B2B Hub grid responsive fix ----- */
/* FIX #4: B2B grid collapses at tablet widths */
@media (max-width: 900px) {
    [style*="grid-template-columns:repeat(4,1fr)"] {
        display: grid !important;
        grid-template-columns: repeat(2, 1fr) !important;
    }
}
@media (max-width: 480px) {
    [style*="grid-template-columns:repeat(4,1fr)"] {
        grid-template-columns: 1fr !important;
    }
}

/* ----- Responsive ----- */
@media (max-width: 1024px) {
    /* FIX #5: 3-col form row collapses properly */
    .form-row-3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
    :root { --sidebar-w: 270px; }
    .sidebar {
        transform: translateX(-100%);
        box-shadow: 5px 0 25px rgba(0,0,0,0.3);
    }
    .sidebar.mobile-open { transform: translateX(0); }
    .sidebar-overlay.show { display: block; }
    .main-content { margin-left: 0; }
    .toggle-sidebar-btn { display: flex; }
    .header-search-bar { display: none; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .form-row-3 { grid-template-columns: 1fr; }
    .page-body { padding: 1rem; }
    .filter-bar { flex-direction: column; }
    .filter-bar .filter-group,
    .filter-bar .filter-group:first-child { flex: 1 1 100%; min-width: 100%; }
}
@media (max-width: 580px) {
    /* FIX #5: Ensure 3-col also collapses at small phones */
    .form-row-3 { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
}

/* ----- Print ----- */
@media print {
    .sidebar, .top-header, .btn, .pagination, .filter-bar { display: none !important; }
    .main-content { margin-left: 0; }
    .card { box-shadow: none; border: 1px solid #ccc; }
}