/* ═══════════════════════════════════════════════════════════════════
   RFID Attendance — Dark Professional Design System
   ═══════════════════════════════════════════════════════════════════ */

/* Bootstrap Icons are loaded non-blocking (preload trick in layout.php),
   so their font never blocks initial render. Icons will appear after
   first paint, which is the correct behavior for decorative glyphs. */

/* ── 1. Design Tokens ──────────────────────────────────────────────── */
:root {
    /* Sidebar */
    --sb-bg:           #0f172a;
    --sb-surface:      #1e293b;
    --sb-border:       rgba(255,255,255,0.07);
    --sb-text:         #94a3b8;
    --sb-text-hover:   #e2e8f0;
    --sb-text-active:  #ffffff;
    --sb-active-bg:    rgba(59,130,246,0.15);
    --sb-active-bar:   #3b82f6;
    --sb-hover-bg:     rgba(255,255,255,0.06);

    /* Topbar */
    --tb-bg:           #1e293b;
    --tb-border:       #334155;
    --tb-text:         #f8fafc;
    --tb-muted:        #94a3b8;

    /* App shell */
    --app-bg:          #f1f5f9;

    /* Surfaces */
    --surface:         #ffffff;
    --surface-2:       #f8fafc;
    --surface-3:       #f1f5f9;

    /* Text */
    --tx-primary:      #0f172a;
    --tx-secondary:    #475569;
    --tx-muted:        #94a3b8;
    --tx-placeholder:  #cbd5e1;

    /* Borders */
    --border:          #e2e8f0;
    --border-focus:    #3b82f6;

    /* Accent palette */
    --ac-blue:         #3b82f6;
    --ac-blue-light:   #eff6ff;
    --ac-blue-dark:    #1d4ed8;
    --ac-green:        #22c55e;
    --ac-green-light:  #f0fdf4;
    --ac-amber:        #f59e0b;
    --ac-amber-light:  #fffbeb;
    --ac-purple:       #8b5cf6;
    --ac-purple-light: #f5f3ff;
    --ac-rose:         #f43f5e;
    --ac-rose-light:   #fff1f2;
    --ac-teal:         #14b8a6;
    --ac-teal-light:   #f0fdfa;
    --ac-sky:          #0ea5e9;
    --ac-sky-light:    #f0f9ff;

    /* Shadows */
    --shadow-xs:  0 1px 2px rgba(15,23,42,0.06);
    --shadow-sm:  0 2px 6px rgba(15,23,42,0.07);
    --shadow-md:  0 4px 16px rgba(15,23,42,0.09);
    --shadow-lg:  0 8px 30px rgba(15,23,42,0.12);
    --shadow-xl:  0 16px 48px rgba(15,23,42,0.16);

    /* Radii */
    --r-sm:  8px;
    --r-md:  12px;
    --r-lg:  16px;
    --r-xl:  20px;
    --r-pill: 999px;

    /* Transitions */
    --ease: 0.18s ease;
}

/* ── 2. Base ───────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    font-size: 0.9375rem;
    color: var(--tx-primary);
    background: var(--app-bg);
    -webkit-font-smoothing: antialiased;
    font-feature-settings: "cv11","ss01";
}

/* ── 3. App Shell ──────────────────────────────────────────────────── */
:root {
    --sb-width:      230px;
    --sb-mini-width:  64px;
    --sb-transition: 0.22s ease;
}

.app-shell {
    display: flex;
    min-height: 100vh;
    position: relative;
}

/* Mobile overlay backdrop */
.sb-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.55);
    z-index: 1039;
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
}

.sb-overlay.active { display: block; }

/* Sidebar toggle button (in topbar) */
.sb-toggle-btn {
    width: 34px;
    height: 34px;
    border-radius: var(--r-sm);
    border: 1px solid rgba(255,255,255,0.1);
    background: rgba(255,255,255,0.07);
    color: var(--tb-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    cursor: pointer;
    transition: all var(--ease);
    flex-shrink: 0;
    margin-right: 0.5rem;
}

.sb-toggle-btn:hover {
    background: rgba(255,255,255,0.14);
    color: #fff;
}

/* Mobile close button (inside sidebar, hidden on desktop) */
.sb-close-btn {
    display: none;
    width: 30px;
    height: 30px;
    border-radius: 6px;
    border: 1px solid var(--sb-border);
    background: transparent;
    color: var(--sb-text);
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    cursor: pointer;
    flex-shrink: 0;
    margin-left: auto;
    transition: all var(--ease);
}

.sb-close-btn:hover {
    background: rgba(255,255,255,0.1);
    color: #fff;
}

/* ── 4. Sidebar ────────────────────────────────────────────────────── */
.sidebar {
    width: var(--sb-width);
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    overflow-x: hidden;
    background: var(--sb-bg);
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    transition: width var(--sb-transition);
    z-index: 100;
}

/* ── Desktop: Collapsed (icon-only) state ──────────────────────────── */
.app-shell.sb-collapsed .sidebar {
    width: var(--sb-mini-width);
}

.app-shell.sb-collapsed .sb-brand {
    justify-content: center;
    padding: 1.1rem 0.5rem;
    gap: 0;
}

.app-shell.sb-collapsed .sb-brand-text,
.app-shell.sb-collapsed .sb-year-badge {
    display: none !important;
}

.app-shell.sb-collapsed .sb-nav a,
.app-shell.sb-collapsed .sidebar .menu-toggle {
    justify-content: center;
    padding: 0.6rem 0;
}

.app-shell.sb-collapsed .sb-nav a > span:last-child,
.app-shell.sb-collapsed .sidebar .menu-toggle .left > span:not(.sb-icon),
.app-shell.sb-collapsed .sidebar .menu-toggle .chev,
.app-shell.sb-collapsed .sidebar .sub-links {
    display: none !important;
}

.app-shell.sb-collapsed .sb-icon {
    margin: 0;
}

.app-shell.sb-collapsed .sb-user {
    justify-content: center;
    padding: 0.85rem 0.5rem;
    gap: 0;
}

.app-shell.sb-collapsed .sb-user-info {
    display: none !important;
}

/* Tooltip for collapsed nav items */
.app-shell.sb-collapsed .sb-nav a[title],
.app-shell.sb-collapsed .sidebar .menu-toggle[title] {
    position: relative;
}

/* Main content flex */
.main-content {
    flex: 1;
    min-width: 0;
    padding: 1.25rem;
    transition: none;
}

/* ── Mobile (≤767px) ───────────────────────────────────────────────── */
@media (max-width: 767.98px) {
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        height: 100% !important;
        width: var(--sb-width) !important;
        transform: translateX(-100%);
        transition: transform var(--sb-transition);
        z-index: 1040;
    }

    .app-shell.sb-open .sidebar {
        transform: translateX(0);
    }

    /* On mobile, don't apply desktop-collapsed class */
    .app-shell.sb-collapsed .sidebar {
        width: var(--sb-width) !important;
    }

    .main-content {
        padding: 0.85rem;
        width: 100%;
    }

    .sb-close-btn {
        display: flex;
    }
}

/* ── Tablet (768px–991px) ──────────────────────────────────────────── */
@media (min-width: 768px) and (max-width: 991.98px) {
    :root { --sb-width: 200px; }

    .main-content {
        padding: 1rem;
    }
}

/* Scrollbar */
.sidebar::-webkit-scrollbar { width: 3px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.12); border-radius: 4px; }
.sidebar::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.25); }

/* Brand */
.sb-brand {
    padding: 1.25rem 1rem 1rem;
    border-bottom: 1px solid var(--sb-border);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.sb-logo {
    width: 38px;
    height: 38px;
    border-radius: var(--r-md);
    background: linear-gradient(135deg, var(--ac-blue), var(--ac-purple));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 800;
    color: #fff;
    letter-spacing: -0.5px;
    flex-shrink: 0;
}

.sb-logo-img {
    background: #fff;
    padding: 3px;
}

.sb-logo-img img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 9px;
    display: block;
}

.sb-brand-text { min-width: 0; }

.sb-school-name {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--sb-text-active);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.2;
}

.sb-year-badge {
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--ac-blue);
    background: rgba(59,130,246,0.15);
    border-radius: var(--r-pill);
    padding: 0.1rem 0.45rem;
    display: inline-block;
    margin-top: 0.15rem;
    letter-spacing: 0.03em;
}

/* Nav */
.sb-nav {
    flex: 1;
    padding: 0.75rem 0.75rem 0.5rem;
}

.sb-nav-label {
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--tx-muted);
    padding: 0.75rem 0.5rem 0.35rem;
}

.sidebar a,
.sb-link {
    color: var(--sb-text);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.6rem 0.75rem;
    border-radius: var(--r-sm);
    margin-bottom: 0.15rem;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--ease);
    position: relative;
}

.sidebar a:hover,
.sb-link:hover {
    background: var(--sb-hover-bg);
    color: var(--sb-text-hover);
}

.sidebar a.active,
.sb-link.active {
    background: var(--sb-active-bg);
    color: var(--sb-text-active);
    font-weight: 600;
}

.sidebar a.active::before,
.sb-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 20%;
    bottom: 20%;
    width: 3px;
    border-radius: 0 3px 3px 0;
    background: var(--sb-active-bar);
}

/* Nav icon square */
.sb-icon {
    width: 28px;
    height: 28px;
    border-radius: 7px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    flex-shrink: 0;
    background: rgba(255,255,255,0.07);
    transition: background var(--ease);
}

.sidebar a.active .sb-icon,
.sb-link.active .sb-icon {
    background: var(--ac-blue);
    color: #fff;
}

.sidebar a:hover .sb-icon {
    background: rgba(255,255,255,0.12);
}

/* Collapsible sub-menu (Users) */
.sidebar .menu-toggle {
    width: 100%;
    border: 0;
    background: transparent;
    color: var(--sb-text);
    text-align: left;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.6rem 0.75rem;
    border-radius: var(--r-sm);
    margin-bottom: 0.15rem;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--ease);
    position: relative;
    cursor: pointer;
}

.sidebar .menu-toggle .left {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}

.sidebar .menu-toggle:hover,
.sidebar .menu-toggle.active {
    background: var(--sb-hover-bg);
    color: var(--sb-text-hover);
}

.sidebar .menu-toggle.active {
    background: var(--sb-active-bg);
    color: var(--sb-text-active);
}

.sidebar .menu-toggle .chev {
    font-size: 0.75rem;
    color: var(--tx-muted);
    transition: transform 0.22s ease;
}

.sidebar .menu-toggle[aria-expanded="true"] .chev { transform: rotate(180deg); }

.sidebar .sub-links {
    margin: 0.1rem 0 0.35rem 1.3rem;
    border-left: 1px solid var(--sb-border);
    padding-left: 0.65rem;
}

.sidebar .sub-links a {
    padding: 0.45rem 0.65rem;
    margin-bottom: 0.08rem;
    font-size: 0.825rem;
    color: var(--sb-text);
    border-radius: 6px;
    gap: 0;
}

.sidebar .sub-links a.active-sub {
    background: var(--sb-active-bg);
    color: var(--sb-text-active);
    font-weight: 600;
}

.sidebar .sub-links a.active-sub::before { display: none; }

/* User profile block at bottom */
.sb-user {
    padding: 0.85rem 1rem;
    border-top: 1px solid var(--sb-border);
    display: flex;
    align-items: center;
    gap: 0.65rem;
    flex-shrink: 0;
}

.sb-user-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: linear-gradient(135deg, #475569, #64748b);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
}

.sb-user-info { min-width: 0; flex: 1; }

.sb-user-name {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--sb-text-active);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.2;
}

.sb-user-role {
    font-size: 0.68rem;
    color: var(--tx-muted);
}

.sb-logout {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--tx-muted);
    background: transparent;
    transition: all var(--ease);
    flex-shrink: 0;
    text-decoration: none;
    font-size: 1rem;
}

.sb-logout:hover {
    background: rgba(244,63,94,0.15);
    color: var(--ac-rose);
}

/* ── 5. Topbar ─────────────────────────────────────────────────────── */
.topbar {
    background: var(--tb-bg);
    border-radius: var(--r-lg);
    color: var(--tb-text);
    box-shadow: var(--shadow-md);
    padding: 0.75rem 1.1rem;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.tb-left { display: flex; align-items: center; gap: 0.75rem; flex: 1; min-width: 0; }

.tb-page-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--r-sm);
    background: rgba(59,130,246,0.2);
    color: var(--ac-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}

.tb-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--tb-text);
    line-height: 1.2;
    margin: 0;
}

.tb-subtitle {
    font-size: 0.72rem;
    color: var(--tb-muted);
    margin-top: 0.05rem;
}

.tb-right { display: flex; align-items: center; gap: 0.75rem; flex-shrink: 0; margin-left: auto; }

.tb-plan-badge {
    background: rgba(59,130,246,0.18);
    color: #93c5fd;
    border: 1px solid rgba(59,130,246,0.25);
    border-radius: var(--r-pill);
    padding: 0.25rem 0.7rem;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    white-space: nowrap;
}

.tb-datetime {
    font-size: 0.72rem;
    color: var(--tb-muted);
    text-align: right;
    line-height: 1.5;
}

/* ── 6. Cards ──────────────────────────────────────────────────────── */
.card {
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    box-shadow: var(--shadow-sm);
    background: var(--surface);
    overflow: hidden;
}

.card-header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 0.85rem 1.25rem;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--tx-primary);
    display: flex;
    align-items: center;
}

.card-body { padding: 1.25rem; }

/* Stat cards */
.stat-card {
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    background: var(--surface);
    box-shadow: var(--shadow-sm);
    padding: 1.1rem 1.15rem;
    position: relative;
    overflow: hidden;
    transition: box-shadow var(--ease), transform var(--ease);
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--stat-accent, var(--ac-blue));
    border-radius: var(--r-lg) var(--r-lg) 0 0;
}

.stat-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--r-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    flex-shrink: 0;
    background: var(--stat-icon-bg, var(--ac-blue-light));
    color: var(--stat-accent, var(--ac-blue));
}

.stat-label {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--tx-muted);
}

.stat-value {
    font-size: 1.65rem;
    font-weight: 800;
    color: var(--tx-primary);
    line-height: 1.1;
}

.stat-sub {
    font-size: 0.75rem;
    color: var(--tx-secondary);
    margin-top: 0.15rem;
}

/* Accent modifiers */
.sa-blue  { --stat-accent: var(--ac-blue);   --stat-icon-bg: var(--ac-blue-light);   }
.sa-green { --stat-accent: var(--ac-green);  --stat-icon-bg: var(--ac-green-light);  }
.sa-amber { --stat-accent: var(--ac-amber);  --stat-icon-bg: var(--ac-amber-light);  }
.sa-purple{ --stat-accent: var(--ac-purple); --stat-icon-bg: var(--ac-purple-light); }
.sa-rose  { --stat-accent: var(--ac-rose);   --stat-icon-bg: var(--ac-rose-light);   }
.sa-teal  { --stat-accent: var(--ac-teal);   --stat-icon-bg: var(--ac-teal-light);   }
.sa-sky   { --stat-accent: var(--ac-sky);    --stat-icon-bg: var(--ac-sky-light);    }

/* ── 7. Tables ─────────────────────────────────────────────────────── */
.table {
    --bs-table-striped-bg: #f8fafc;
    --bs-table-hover-bg: #eff6ff;
    border-color: var(--border);
}

.table thead th {
    background: #1e293b;
    color: #e2e8f0;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    border: none;
    padding: 0.75rem 1rem;
    white-space: nowrap;
}

.table tbody td {
    font-size: 0.875rem;
    color: var(--tx-secondary);
    padding: 0.7rem 1rem;
    border-color: var(--border);
    vertical-align: middle;
}

.table tbody tr:last-child td { border-bottom: none; }

.table-responsive {
    max-height: 70vh;
    border-radius: 0 0 var(--r-lg) var(--r-lg);
}

.table-responsive thead th {
    position: sticky;
    top: 0;
    z-index: 2;
}

/* Sort links */
.sort-link {
    color: #e2e8f0;
    text-decoration: none;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.sort-link:hover { color: #fff; text-decoration: none; }

.sort-indicator { font-size: 0.68rem; opacity: 0.65; }

/* ── 8. Forms ──────────────────────────────────────────────────────── */
.form-control,
.form-select {
    border-color: var(--border);
    border-radius: var(--r-sm);
    font-size: 0.875rem;
    color: var(--tx-primary);
    background-color: var(--surface);
    transition: border-color var(--ease), box-shadow var(--ease);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.12);
    background-color: var(--surface);
}

.form-control::placeholder { color: var(--tx-placeholder); }

.form-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--tx-secondary);
    margin-bottom: 0.35rem;
}

.form-text {
    font-size: 0.76rem;
    color: var(--tx-muted);
}

.input-group-text {
    background: var(--surface-3);
    border-color: var(--border);
    color: var(--tx-muted);
    font-size: 0.875rem;
}

/* ── 9. Buttons ────────────────────────────────────────────────────── */
.btn {
    border-radius: var(--r-sm);
    font-weight: 600;
    font-size: 0.875rem;
    transition: all var(--ease);
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.btn-sm { border-radius: 7px; font-size: 0.8rem; }

.btn-primary {
    background: var(--ac-blue);
    border-color: var(--ac-blue);
    color: #fff;
}

.btn-primary:hover {
    background: var(--ac-blue-dark);
    border-color: var(--ac-blue-dark);
    color: #fff;
    box-shadow: 0 4px 12px rgba(59,130,246,0.35);
}

.btn-success:hover { box-shadow: 0 4px 12px rgba(34,197,94,0.35); }
.btn-danger:hover  { box-shadow: 0 4px 12px rgba(244,63,94,0.35); }

.btn-outline-primary {
    color: var(--ac-blue);
    border-color: var(--ac-blue);
}

.btn-outline-primary:hover {
    background: var(--ac-blue);
    border-color: var(--ac-blue);
    color: #fff;
    box-shadow: 0 4px 12px rgba(59,130,246,0.25);
}

/* Toolbar button */
.toolbar-btn {
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--tx-secondary);
    font-weight: 600;
    font-size: 0.8rem;
    padding: 0.38rem 0.75rem;
    border-radius: var(--r-sm);
    transition: all var(--ease);
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    text-decoration: none;
}

.toolbar-btn:hover {
    background: var(--surface-3);
    border-color: #cbd5e1;
    color: var(--tx-primary);
}

/* Action buttons */
.btn-action-menu {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    color: var(--ac-blue);
    font-size: 0.78rem;
    font-weight: 600;
    padding: 0.3rem 0.65rem;
    border-radius: 7px;
    transition: all var(--ease);
}

.btn-action-menu:hover {
    background: var(--ac-blue);
    color: #fff;
    border-color: var(--ac-blue);
}

.btn-delete-user {
    background: #fff1f2;
    border: 1px solid #fecdd3;
    color: var(--ac-rose);
    font-size: 0.78rem;
    font-weight: 600;
    padding: 0.3rem 0.65rem;
    border-radius: 7px;
    transition: all var(--ease);
}

.btn-delete-user:hover {
    background: var(--ac-rose);
    color: #fff;
    border-color: var(--ac-rose);
}

/* ── 10. Badges & Chips ────────────────────────────────────────────── */
.badge-soft {
    background: rgba(59,130,246,0.1);
    color: var(--ac-blue);
    border-radius: var(--r-pill);
    padding: 0.3rem 0.65rem;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.01em;
}

.chip {
    border-radius: var(--r-pill);
    padding: 0.22rem 0.6rem;
    font-size: 0.72rem;
    font-weight: 600;
    background: rgba(59,130,246,0.1);
    color: var(--ac-blue);
    display: inline-block;
}

/* ── 11. Alerts ────────────────────────────────────────────────────── */
.alert {
    border: 0;
    border-radius: var(--r-md);
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.85rem 1.1rem;
    border-left: 4px solid transparent;
}

.alert-success {
    background: #f0fdf4;
    color: #166534;
    border-left-color: var(--ac-green);
}

.alert-danger {
    background: #fff1f2;
    color: #9f1239;
    border-left-color: var(--ac-rose);
}

.alert-info {
    background: var(--ac-blue-light);
    color: #1e40af;
    border-left-color: var(--ac-blue);
}

.alert-warning {
    background: var(--ac-amber-light);
    color: #92400e;
    border-left-color: var(--ac-amber);
}

.alert-fade-out {
    transition: opacity 0.28s ease;
    opacity: 0;
}

/* ── 12. Pagination ────────────────────────────────────────────────── */
.users-pagination-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.85rem 1.25rem;
    border-top: 1px solid var(--border);
    background: var(--surface-2);
    border-radius: 0 0 var(--r-lg) var(--r-lg);
    font-size: 0.8rem;
    color: var(--tx-secondary);
    flex-wrap: wrap;
}

.page-size-form { display: flex; align-items: center; gap: 0.5rem; }

.pagination-pages { display: flex; align-items: center; gap: 0.25rem; }

.pagination-pages a,
.pagination-pages span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 30px;
    height: 30px;
    border-radius: 6px;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--tx-secondary);
    text-decoration: none;
    border: 1px solid transparent;
    transition: all var(--ease);
    padding: 0 0.4rem;
}

.pagination-pages a:hover {
    background: var(--surface-3);
    border-color: var(--border);
    color: var(--tx-primary);
}

.pagination-pages .page-current {
    background: var(--ac-blue);
    color: #fff;
    border-color: var(--ac-blue);
}

.pagination-pages .page-disabled { opacity: 0.35; pointer-events: none; }

/* ── 13. Auth pages ────────────────────────────────────────────────── */
.auth-shell {
    min-height: 100vh;
    background: #0f172a;
    background-image:
        radial-gradient(ellipse at 0% 0%,   rgba(59,130,246,0.22) 0%, transparent 50%),
        radial-gradient(ellipse at 100% 100%, rgba(139,92,246,0.18) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 100%, rgba(20,184,166,0.1) 0%, transparent 45%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-card {
    border: 1px solid rgba(255,255,255,0.09);
    border-top: 3px solid var(--ac-blue);
    border-radius: var(--r-xl);
    box-shadow: var(--shadow-xl), 0 0 0 1px rgba(59,130,246,0.08);
    background: rgba(30,41,59,0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: #f1f5f9;
    width: 100%;
    max-width: 420px;
}

.auth-card .card-body { padding: 2rem 2rem 1.75rem; }

.auth-card .form-label {
    color: #94a3b8;
    font-size: 0.8rem;
    font-weight: 600;
}

.auth-card .form-control {
    background: rgba(15,23,42,0.6);
    border-color: rgba(255,255,255,0.1);
    color: #f1f5f9;
    border-radius: var(--r-sm);
}

.auth-card .form-control:focus {
    background: rgba(15,23,42,0.8);
    border-color: var(--ac-blue);
    color: #f1f5f9;
    box-shadow: 0 0 0 3px rgba(59,130,246,0.18);
}

.auth-card .form-control::placeholder { color: #475569; }

.auth-card .btn-primary {
    background: var(--ac-blue);
    border-color: var(--ac-blue);
    font-weight: 700;
    letter-spacing: 0.02em;
}

.auth-card .btn-primary:hover {
    background: var(--ac-blue-dark);
    border-color: var(--ac-blue-dark);
    box-shadow: 0 6px 20px rgba(59,130,246,0.4);
}

.auth-card .alert-danger {
    background: rgba(244,63,94,0.15);
    color: #fda4af;
    border-left-color: var(--ac-rose);
}

/* ── 14. Section label dividers ────────────────────────────────────── */
.section-label {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    color: var(--tx-muted);
    padding: 0.35rem 0 0.1rem;
    border-bottom: 1px solid var(--border);
    margin-bottom: 0.1rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

/* ── 15. Users table specific ──────────────────────────────────────── */
.users-table .col-action { width: 160px; }

/* ── 16. Page header pattern ───────────────────────────────────────── */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
}

.page-header-left { display: flex; align-items: center; gap: 0.75rem; }

.page-header-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--r-md);
    background: var(--ac-blue-light);
    color: var(--ac-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.page-header h5 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--tx-primary);
    margin: 0;
    line-height: 1.2;
}

.page-header p {
    font-size: 0.78rem;
    color: var(--tx-muted);
    margin: 0;
}

/* ── 17. Misc helpers ──────────────────────────────────────────────── */
.kbd {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 5px;
    padding: 0.08rem 0.38rem;
    font-size: 0.75rem;
    color: #93c5fd;
}

.sticky-filters {
    position: sticky;
    top: 0.75rem;
    z-index: 6;
}

/* Scan & role badges (used in logs) */
.scan-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    border-radius: var(--r-pill);
    padding: 0.22rem 0.6rem;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.03em;
}

.scan-in    { background: #f0fdf4; color: #15803d; }
.scan-out   { background: #fff1f2; color: #be123c; }
.scan-other { background: var(--ac-blue-light); color: #1d4ed8; }

.role-chip {
    display: inline-flex;
    align-items: center;
    border-radius: var(--r-pill);
    padding: 0.18rem 0.55rem;
    font-size: 0.7rem;
    font-weight: 700;
}

/* Count badge used in academics */
.count-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 22px;
    height: 22px;
    border-radius: var(--r-pill);
    background: var(--ac-green-light);
    color: #15803d;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0 0.4rem;
}

.count-badge.has-students {
    background: var(--ac-blue-light);
    color: var(--ac-blue);
}

/* ── 18. Utility tweaks ────────────────────────────────────────────── */
h1, h2, h3, h4, h5 { color: var(--tx-primary); }
.text-muted { color: var(--tx-muted) !important; }
small { font-size: 0.8em; }

/* Smooth hover on all sidebar links */
.sidebar a,
.sidebar .menu-toggle { outline-offset: 2px; }

/* ── 19. Mobile responsiveness ─────────────────────────────────────── */
@media (max-width: 767.98px) {
    /* Topbar: hide plan badge and datetime on very small screens */
    .tb-plan-badge { display: none; }
    .tb-datetime   { display: none; }

    .tb-title    { font-size: 0.95rem; }
    .tb-subtitle { display: none; }

    /* Page headers */
    .page-header {
        flex-direction: column;
        align-items: flex-start !important;
        gap: 0.6rem !important;
    }

    .page-header .d-flex {
        flex-wrap: wrap;
        gap: 0.4rem;
    }

    /* Stat cards: 2 per row */
    .stat-card-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }

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

    /* Cards */
    .card { border-radius: var(--r-md); }

    /* Modals: full width on mobile */
    .modal-dialog { margin: 0.5rem; }

    /* Toolbar wrapping */
    .toolbar-row {
        flex-wrap: wrap;
        gap: 0.4rem;
    }
}

@media (max-width: 479.98px) {
    /* Extra small: 1 stat card per row */
    .stat-card-grid {
        grid-template-columns: 1fr !important;
    }

    .main-content {
        padding: 0.6rem;
    }
}