/* ==========================================================================
   QR Attendance Dashboard — Design System
   ========================================================================== */

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

/* ---------- CSS Custom Properties ---------- */
:root {
    /* Brand */
    --primary: #1e3a8a;
    --primary-hover: #172554;
    --primary-light: #e4ecf8;
    --primary-gradient: #1e3a8a;

    /* Neutrals — soft blue-slate (easier on the eyes than pure white) */
    --gray-50: #e8eef5;
    --gray-100: #dde5f0;
    --gray-200: #c9d4e3;
    --gray-300: #a8b6c9;
    --gray-400: #7b8fa8;
    --gray-500: #5b6f88;
    --gray-600: #45566d;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    /* Semantic */
    --success: #10b981;
    --success-light: #d1fae5;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --danger: #ef4444;
    --danger-light: #fee2e2;
    --info: #3b82f6;
    --info-light: #dbeafe;

    /* Sidebar */
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 72px;
    --sidebar-bg: #0f172a;
    --sidebar-text: #94a3b8;
    --sidebar-text-active: #ffffff;
    --sidebar-icon: #64748b;
    --sidebar-icon-active: #3b82f6;
    --sidebar-hover-bg: rgba(255, 255, 255, 0.06);
    --sidebar-active-bg: rgba(30, 58, 138, 0.2);
    --sidebar-border: rgba(255, 255, 255, 0.06);

    /* Navbar */
    --navbar-height: 64px;
    --navbar-bg: rgba(236, 242, 249, 0.92);
    --navbar-shadow: 0 1px 3px rgba(15, 23, 42, 0.06);

    /* Cards / surfaces */
    --card-bg: #f1f5fa;
    --card-border: #c9d4e3;
    --card-radius: 5px;
    --card-shadow: 0 1px 3px rgba(15, 23, 42, 0.04), 0 1px 2px rgba(15, 23, 42, 0.05);
    --card-shadow-hover: 0 10px 25px rgba(15, 23, 42, 0.08), 0 4px 10px rgba(15, 23, 42, 0.04);
    --input-bg: #e8eef5;
    --surface-elevated: #f7f9fc;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- Base ---------- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--gray-700);
    background-color: var(--gray-50);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ---------- Sidebar ---------- */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--sidebar-bg);
    z-index: 1040;
    transition: width var(--transition-base);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-header {
    display: flex;
    align-items: center;
    padding: 20px 20px;
    height: var(--navbar-height);
    border-bottom: 1px solid var(--sidebar-border);
    flex-shrink: 0;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: #fff;
    white-space: nowrap;
    overflow: hidden;
}

.sidebar-brand-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: #fff;
    flex-shrink: 0;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(30, 58, 138, 0.25);
}

.sidebar-brand-icon img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
}

.sidebar-brand-text {
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: -0.3px;
    opacity: 1;
    transition: opacity var(--transition-fast);
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    overflow-y: auto;
    overflow-x: hidden;
}

.sidebar-nav::-webkit-scrollbar {
    width: 4px;
}

.sidebar-nav::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 1.2px;
}

.sidebar-label {
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--gray-500);
    padding: 12px 14px 8px;
    white-space: nowrap;
    overflow: hidden;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-radius: 3px;
    color: var(--sidebar-text);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.85rem;
    white-space: nowrap;
    transition: all var(--transition-fast);
    margin-bottom: 2px;
    position: relative;
}

.sidebar-link i {
    font-size: 1.15rem;
    width: 22px;
    text-align: center;
    flex-shrink: 0;
    transition: color var(--transition-fast);
}

.sidebar-link:hover {
    background: var(--sidebar-hover-bg);
    color: var(--sidebar-text-active);
    text-decoration: none;
}

.sidebar-link:hover i {
    color: var(--sidebar-icon-active);
}

.sidebar-link.active {
    background: var(--sidebar-active-bg);
    color: var(--sidebar-text-active);
}

.sidebar-link.active i {
    color: var(--sidebar-icon-active);
}

.sidebar-link.active::before {
    content: '';
    position: absolute;
    left: -12px;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 24px;
    background: var(--primary);
    border-radius: 0 1px 1px 0;
}

.sidebar-link .link-text {
    opacity: 1;
    transition: opacity var(--transition-fast);
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--sidebar-border);
    flex-shrink: 0;
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.04);
    overflow: hidden;
}

.sidebar-user-avatar {
    width: 34px;
    height: 34px;
    border-radius: 2.5px;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.8rem;
    color: #fff;
    flex-shrink: 0;
}

.sidebar-user-info {
    overflow: hidden;
    white-space: nowrap;
}

.sidebar-user-name {
    font-size: 0.8rem;
    font-weight: 600;
    color: #fff;
}

.sidebar-user-role {
    font-size: 0.7rem;
    color: var(--gray-400);
}

/* Collapsed Sidebar */
.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.sidebar.collapsed .sidebar-brand-text,
.sidebar.collapsed .sidebar-label,
.sidebar.collapsed .sidebar-link .link-text,
.sidebar.collapsed .sidebar-user-info {
    opacity: 0;
    pointer-events: none;
}

.sidebar.collapsed .sidebar-link::before {
    left: 0;
}

.sidebar.collapsed .sidebar-link {
    justify-content: center;
    padding: 10px;
}

.sidebar.collapsed .sidebar-link i {
    margin: 0;
}

/* Sidebar tooltip on collapsed */
.sidebar.collapsed .sidebar-link {
    position: relative;
}

.sidebar.collapsed .sidebar-link:hover::after {
    content: attr(data-title);
    position: absolute;
    left: calc(var(--sidebar-collapsed-width) + 6px);
    top: 50%;
    transform: translateY(-50%);
    background: var(--gray-900);
    color: #fff;
    padding: 4px 12px;
    border-radius: 2px;
    font-size: 0.75rem;
    white-space: nowrap;
    z-index: 9999;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    pointer-events: none;
}

/* ---------- Main Content ---------- */
.main-wrapper {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    transition: margin-left var(--transition-base);
}

.main-wrapper.sidebar-collapsed {
    margin-left: var(--sidebar-collapsed-width);
}

/* ---------- Top Navbar ---------- */
.top-navbar {
    position: sticky;
    top: 0;
    height: var(--navbar-height);
    background: var(--navbar-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    z-index: 1030;
    box-shadow: var(--navbar-shadow);
}

.top-navbar-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.sidebar-toggle {
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    border-radius: 2.5px;
    color: var(--gray-600);
    font-size: 1.15rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.sidebar-toggle:hover {
    background: var(--gray-100);
    color: var(--primary);
}

.page-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--gray-800);
    letter-spacing: -0.3px;
}

.top-navbar-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.navbar-icon-btn {
    width: 38px;
    height: 38px;
    border: none;
    background: transparent;
    border-radius: 3px;
    color: var(--gray-500);
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    position: relative;
}

.navbar-icon-btn:hover {
    background: var(--gray-100);
    color: var(--primary);
}

.navbar-icon-btn .badge-dot {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 7px;
    height: 7px;
    background: var(--danger);
    border-radius: 50%;
    border: 2px solid var(--surface-elevated);
}

.navbar-user-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 12px 4px 4px;
    border: 1px solid var(--gray-200);
    background: var(--surface-elevated);
    border-radius: 7px;
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-left: 8px;
}

.navbar-user-btn:hover {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.navbar-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.75rem;
    color: #fff;
}

.navbar-user-name {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--gray-700);
}

/* ---------- Content Area ---------- */
.content-area {
    padding: 16px;
    min-height: calc(100vh - var(--navbar-height));
}

/* ---------- Page Header ---------- */
.page-header {
    margin-bottom: 16px;
}

.page-header h1 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--gray-900);
    letter-spacing: -0.5px;
    margin-bottom: 4px;
}

.page-header p {
    font-size: 0.85rem;
    color: var(--gray-500);
    margin: 0;
}

/* ---------- Stat Cards ---------- */
.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--card-radius);
    padding: 24px;
    box-shadow: var(--card-shadow);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

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

.stat-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 120px;
    height: 120px;
    border-radius: 50%;
    opacity: 0.04;
    transform: translate(30%, -30%);
}

.stat-card.stat-primary::after { background: var(--primary); }
.stat-card.stat-success::after { background: var(--success); }
.stat-card.stat-warning::after { background: var(--warning); }
.stat-card.stat-info::after { background: var(--info); }

.stat-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.stat-card-icon {
    width: 44px;
    height: 44px;
    border-radius: 3.5px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.stat-card.stat-primary .stat-card-icon {
    background: var(--primary-light);
    color: var(--primary);
}

.stat-card.stat-success .stat-card-icon {
    background: var(--success-light);
    color: var(--success);
}

.stat-card.stat-warning .stat-card-icon {
    background: var(--warning-light);
    color: var(--warning);
}

.stat-card.stat-info .stat-card-icon {
    background: var(--info-light);
    color: var(--info);
}

.stat-card-badge {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    gap: 3px;
}

.stat-card-badge.up {
    background: var(--success-light);
    color: #059669;
}

.stat-card-badge.down {
    background: var(--danger-light);
    color: var(--danger);
}

.stat-card-value {
    font-size: 1.85rem;
    font-weight: 800;
    color: var(--gray-900);
    letter-spacing: -1px;
    line-height: 1.1;
    margin-bottom: 4px;
}

.stat-card-label {
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--gray-500);
}

/* ---------- Dashboard Card (generic) ---------- */
.dash-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--card-radius);
    box-shadow: var(--card-shadow);
    transition: box-shadow var(--transition-base);
    overflow: hidden;
}

.dash-card:hover {
    box-shadow: var(--card-shadow-hover);
}

.dash-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--gray-100);
}

.dash-card-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--gray-800);
    display: flex;
    align-items: center;
    gap: 8px;
}

.dash-card-title i {
    color: var(--primary);
    font-size: 1rem;
}

.dash-card-body {
    padding: 24px;
}

.dash-card-body.no-padding {
    padding: 0;
}

/* ---------- Tables ---------- */
.table-wrapper {
    overflow-x: auto;
}

.dash-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.dash-table thead th {
    background: var(--gray-50);
    padding: 12px 16px;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--gray-500);
    border-bottom: 1px solid var(--gray-200);
    white-space: nowrap;
}

.dash-table tbody td {
    padding: 14px 16px;
    font-size: 0.82rem;
    color: var(--gray-700);
    border-bottom: 1px solid var(--gray-100);
    vertical-align: middle;
}

.dash-table tbody tr {
    transition: background var(--transition-fast);
}

.dash-table tbody tr:hover {
    background: var(--gray-50);
}

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

/* DataTables overrides */
.dataTables_wrapper {
    padding: 0 !important;
}

.dataTables_wrapper .dataTables_length,
.dataTables_wrapper .dataTables_filter {
    padding: 16px 24px 0;
}

.dataTables_wrapper .dataTables_length select,
.dataTables_wrapper .dataTables_filter input {
    border: 1px solid var(--gray-200);
    border-radius: 2.5px;
    padding: 6px 12px;
    font-size: 0.82rem;
    font-family: 'Inter', sans-serif;
    outline: none;
    background: var(--input-bg);
    transition: border-color var(--transition-fast);
}

.dataTables_wrapper .dataTables_filter input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.dataTables_wrapper .dataTables_info {
    padding: 16px 24px;
    font-size: 0.78rem;
    color: var(--gray-500);
}

.dataTables_wrapper .dataTables_paginate {
    padding: 12px 24px 16px;
}

.dataTables_wrapper .dataTables_paginate .paginate_button {
    border: 1px solid var(--gray-200) !important;
    border-radius: 2.5px !important;
    padding: 4px 12px !important;
    font-size: 0.78rem !important;
    margin: 0 2px !important;
    background: var(--surface-elevated) !important;
    color: var(--gray-600) !important;
    transition: all var(--transition-fast) !important;
}

.dataTables_wrapper .dataTables_paginate .paginate_button:hover {
    background: var(--primary-light) !important;
    border-color: var(--primary) !important;
    color: var(--primary) !important;
}

.dataTables_wrapper .dataTables_paginate .paginate_button.current {
    background: var(--primary) !important;
    border-color: var(--primary) !important;
    color: #fff !important;
}

.dataTables_wrapper .dataTables_paginate .paginate_button.disabled {
    opacity: 0.4 !important;
}

table.dataTable thead .sorting::before,
table.dataTable thead .sorting::after,
table.dataTable thead .sorting_asc::before,
table.dataTable thead .sorting_asc::after,
table.dataTable thead .sorting_desc::before,
table.dataTable thead .sorting_desc::after {
    opacity: 0.3;
}

table.dataTable thead .sorting_asc::before,
table.dataTable thead .sorting_desc::after {
    opacity: 0.8;
    color: var(--primary);
}

table.dataTable.no-footer {
    border-bottom: none !important;
}

/* ---------- Action Buttons ---------- */
.btn-action {
    width: 32px;
    height: 32px;
    padding: 0;
    border-radius: 2.5px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    border: 1px solid transparent;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.btn-action-view {
    background: var(--success-light);
    color: var(--success);
}
.btn-action-view:hover {
    background: var(--success);
    color: #fff;
}

.btn-action-edit {
    background: var(--info-light);
    color: var(--info);
}
.btn-action-edit:hover {
    background: var(--info);
    color: #fff;
}

.btn-action-delete {
    background: var(--danger-light);
    color: var(--danger);
}
.btn-action-delete:hover {
    background: var(--danger);
    color: #fff;
}

.action-group {
    display: flex;
    gap: 6px;
    justify-content: center;
}

/* ---------- Primary Button ---------- */
.btn-primary-custom {
    background: var(--primary-gradient);
    border: none;
    color: #fff;
    padding: 10px 20px;
    border-radius: 3px;
    font-weight: 600;
    font-size: 0.82rem;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 2px 8px rgba(30, 58, 138, 0.25);
}

.btn-primary-custom:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(30, 58, 138, 0.35);
    color: #fff;
}

.btn-primary-custom:active {
    transform: translateY(0);
}

.btn-secondary-custom {
    background: var(--surface-elevated);
    border: 1px solid var(--gray-200);
    color: var(--gray-700);
    padding: 10px 20px;
    border-radius: 3px;
    font-weight: 600;
    font-size: 0.82rem;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-secondary-custom:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
}

/* ---------- Modals ---------- */
.modal-backdrop {
    z-index: 1070 !important;
}

.modal {
    z-index: 1075 !important;
}

.modal-content {
    border: none;
    border-radius: 5px;
    background: var(--surface-elevated);
    box-shadow: 0 20px 60px rgba(15, 23, 42, 0.18);
}

.modal-header {
    border-bottom: 1px solid var(--gray-100);
    padding: 20px 24px;
}

.modal-title {
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--gray-900);
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    border-top: 1px solid var(--gray-100);
    padding: 16px 24px;
}

.confirm-dialog[hidden] {
    display: none;
}

.confirm-dialog {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: none;
    place-items: center;
    padding: 20px;
}

.confirm-dialog.is-open {
    display: grid;
}

body.confirm-dialog-open {
    overflow: hidden;
}

.confirm-dialog-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.58);
    animation: confirm-fade-in var(--transition-fast) both;
}

.confirm-dialog-panel {
    position: relative;
    width: min(100%, 430px);
    padding: 28px;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 16px;
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    background: var(--surface-elevated);
    box-shadow: 0 24px 70px rgba(15, 23, 42, 0.28);
    animation: confirm-slide-in var(--transition-base) both;
}

.confirm-dialog-icon {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    color: var(--danger);
    background: var(--danger-light);
    font-size: 1.05rem;
}

.confirm-dialog-copy h2 {
    margin: 2px 0 6px;
    color: var(--gray-900);
    font-size: 1.05rem;
    font-weight: 800;
}

.confirm-dialog-copy p {
    margin: 0;
    color: var(--gray-600);
    font-size: 0.85rem;
    line-height: 1.55;
}

.confirm-dialog-actions {
    grid-column: 1 / -1;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 8px;
}

.btn-danger-custom {
    border: 1px solid var(--danger);
    border-radius: 3px;
    padding: 9px 16px;
    color: #fff;
    background: var(--danger);
    font-size: 0.8rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-danger-custom:hover {
    border-color: #dc2626;
    background: #dc2626;
}

.teacher-qr-module {
    max-width: 620px;
    margin: 0 auto;
}

.teacher-qr-image {
    display: block;
    width: min(360px, 80vw);
    height: auto;
    margin: 8px auto 24px;
    border: 12px solid #fff;
    box-shadow: 0 10px 28px rgba(15, 23, 42, 0.14);
}

.teacher-qr-module h2 {
    color: var(--gray-900);
    font-size: 1.25rem;
    font-weight: 800;
}

.teacher-qr-help {
    max-width: 440px;
    margin: 8px auto 16px;
    color: var(--gray-500);
    font-size: 0.85rem;
}

.teacher-qr-code {
    display: inline-block;
    padding: 8px 12px;
    border: 1px solid var(--gray-200);
    border-radius: 4px;
    color: var(--gray-700);
    background: var(--gray-50);
    font-family: monospace;
    font-size: 0.85rem;
    letter-spacing: 1.5px;
}

.teacher-qr-actions {
    margin: 22px 0 12px;
}

@keyframes confirm-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes confirm-slide-in {
    from { opacity: 0; transform: translateY(8px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

/* Form controls */
.form-control-custom {
    border: 1px solid var(--gray-200);
    border-radius: 3px;
    padding: 10px 14px;
    font-size: 0.85rem;
    font-family: 'Inter', sans-serif;
    color: var(--gray-700);
    background: var(--input-bg);
    transition: all var(--transition-fast);
    width: 100%;
}

.form-control-custom:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-control-custom.is-invalid {
    border-color: var(--danger);
    box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.12);
}

.form-control-custom.is-invalid:focus {
    border-color: var(--danger);
    box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.18);
}

.field-error {
    display: none;
    margin-top: 6px;
    font-size: 0.75rem;
    color: var(--danger);
    line-height: 1.35;
}

.field-error.show {
    display: block;
}

.form-hint {
    margin-top: 6px;
    font-size: 0.72rem;
    color: var(--gray-400);
    line-height: 1.35;
}

.form-label-custom {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--gray-600);
    margin-bottom: 6px;
    display: block;
}

.form-label-custom .optional {
    font-weight: 500;
    color: var(--gray-400);
}

/* ---------- Toast Notifications ---------- */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
}

.toast {
    border: none;
    border-radius: 3.5px;
    background: var(--surface-elevated);
    box-shadow: 0 8px 30px rgba(15, 23, 42, 0.12);
    overflow: hidden;
    min-width: 320px;
    backdrop-filter: blur(8px);
}

.toast.toast-success {
    border-left: 4px solid var(--success);
}

.toast.toast-error {
    border-left: 4px solid var(--danger);
}

.toast.toast-warning {
    border-left: 4px solid var(--warning);
}

.toast-header {
    background: transparent;
    border-bottom: none;
    padding: 12px 16px 4px;
}

.toast-body {
    padding: 4px 16px 12px;
    font-size: 0.82rem;
    color: var(--gray-600);
}

/* ---------- QR Scanner ---------- */
.scanner-panel {
    background: var(--gray-900);
    border-radius: var(--card-radius);
    padding: 24px;
    text-align: center;
}

.scanner-panel video {
    width: 100%;
    max-width: 400px;
    border-radius: 3.5px;
    border: 3px solid rgba(30, 58, 138, 0.3);
}

.scanner-panel h5 {
    color: #fff;
    font-weight: 600;
    margin-bottom: 16px;
    font-size: 0.95rem;
}

.scanner-detected {
    background: var(--success-light);
    border: 1px solid var(--success);
    border-radius: 3.5px;
    padding: 24px;
    text-align: center;
}

.scanner-detected h4 {
    color: #059669;
    font-weight: 700;
    margin-bottom: 16px;
}

/* ---------- Status Badge ---------- */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.72rem;
    font-weight: 600;
}

.status-badge.present {
    background: var(--success-light);
    color: #059669;
}

.status-badge.absent {
    background: var(--danger-light);
    color: var(--danger);
}

.status-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
}

/* ---------- Quick Actions ---------- */
.quick-action-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: var(--card-bg);
    border: 1px solid var(--gray-200);
    border-radius: 3.5px;
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-base);
    cursor: pointer;
}

.quick-action-card:hover {
    border-color: var(--primary);
    box-shadow: 0 4px 16px rgba(30, 58, 138, 0.1);
    transform: translateY(-2px);
    text-decoration: none;
    color: inherit;
}

.quick-action-icon {
    width: 48px;
    height: 48px;
    border-radius: 3.5px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}

.quick-action-text h6 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 2px;
}

.quick-action-text p {
    font-size: 0.75rem;
    color: var(--gray-500);
    margin: 0;
}

/* ---------- Animations ---------- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes countUp {
    from { opacity: 0; transform: scale(0.8); }
    to { opacity: 1; transform: scale(1); }
}

.fade-in-up {
    animation: fadeInUp 0.4s ease forwards;
}

.content-loading {
    opacity: 0;
}

.content-loaded {
    animation: fadeInUp 0.35s ease forwards;
}

/* Staggered cards */
.stat-card:nth-child(1) { animation-delay: 0ms; }
.stat-card:nth-child(2) { animation-delay: 60ms; }
.stat-card:nth-child(3) { animation-delay: 120ms; }
.stat-card:nth-child(4) { animation-delay: 180ms; }

/* Skeleton loader */
.skeleton {
    background: linear-gradient(90deg, var(--gray-100) 25%, var(--gray-200) 50%, var(--gray-100) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: 8px;
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ---------- Responsive ---------- */
@media (max-width: 991.98px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform var(--transition-base);
    }

    .sidebar.show {
        transform: translateX(0);
    }

    .sidebar-backdrop {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        z-index: 1035;
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }

    .sidebar-backdrop.show {
        opacity: 1;
        visibility: visible;
    }

    .main-wrapper,
    .main-wrapper.sidebar-collapsed {
        margin-left: 0;
    }

    .content-area {
        padding: 20px 16px;
    }
}

@media (max-width: 575.98px) {
    .stat-card-value {
        font-size: 1.4rem;
    }

    .page-header h1 {
        font-size: 1.25rem;
    }

    .top-navbar {
        padding: 0 16px;
    }

    .navbar-user-name {
        display: none;
    }
}

/* ---------- Empty state ---------- */
.empty-state {
    text-align: center;
    padding: 60px 20px;
}

.empty-state-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--gray-100);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--gray-400);
    margin-bottom: 16px;
}

.empty-state h5 {
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 8px;
}

.empty-state p {
    color: var(--gray-500);
    font-size: 0.85rem;
    max-width: 360px;
    margin: 0 auto;
}

/* ---------- Login Screen ---------- */
.login-screen {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--gray-50);
    padding: 20px;
}

.login-card {
    background: var(--card-bg);
    border: 1px solid var(--gray-200);
    border-radius: 5px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    width: 100%;
    max-width: 400px;
    padding: 32px;
}

.login-logo {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    background: transparent;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto 16px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(30, 58, 138, 0.25);
}

.login-logo img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
}

/* ---------- Attendance Filters ---------- */
.attendance-filters {
    padding: 16px 20px 4px;
    border-bottom: 1px solid var(--gray-100);
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--card-bg) 100%);
}

.attendance-filter-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.attendance-filter-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
}

.attendance-filter-grid .filter-field {
    min-width: 0;
}

.attendance-filter-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding-bottom: 12px;
}

@media (max-width: 1100px) {
    .attendance-filter-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 576px) {
    .attendance-filter-grid {
        grid-template-columns: 1fr;
    }

    .attendance-filter-actions .btn-primary-custom,
    .attendance-filter-actions .btn-secondary-custom {
        flex: 1 1 auto;
        justify-content: center;
    }
}

/* ---------- Professional Student ID Card ---------- */
.student-card-modal .modal-body.student-card-modal-body {
    background:
        radial-gradient(circle at top, rgba(30, 58, 138, 0.08), transparent 55%),
        #e8eef7;
    padding: 32px 24px;
    display: flex;
    justify-content: center;
}

.student-id-card {
    position: relative;
    width: 100%;
    max-width: 680px;
    min-height: 360px;
    aspect-ratio: 1.75 / 1;
    display: grid;
    grid-template-columns: 92px 1fr;
    background: #ffffff;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid #c7d2e5;
    box-shadow:
        0 1px 2px rgba(15, 23, 42, 0.05),
        0 18px 40px rgba(15, 23, 42, 0.14);
    font-family: 'Inter', sans-serif;
    color: #0f172a;
}

.student-id-card .id-card-rail {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.08), transparent 28%),
        linear-gradient(165deg, #1e3a8a 0%, #0f172a 100%);
    color: #fff;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    padding: 18px 10px;
    text-align: center;
    position: relative;
}

.student-id-card .id-card-rail::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        repeating-linear-gradient(
            -35deg,
            rgba(255, 255, 255, 0.045) 0,
            rgba(255, 255, 255, 0.045) 1px,
            transparent 1px,
            transparent 8px
        );
    pointer-events: none;
}

.student-id-card .id-card-rail-top,
.student-id-card .id-card-rail-mid,
.student-id-card .id-card-rail-bottom {
    position: relative;
    z-index: 1;
}

.student-id-card .id-card-rail-mark {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.18);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin: 0 auto 10px;
}

.student-id-card .id-card-rail-title {
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    line-height: 1.2;
}

.student-id-card .id-card-rail-mid {
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 0.62rem;
    font-weight: 800;
    letter-spacing: 0.22em;
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    color: rgba(255, 255, 255, 0.82);
}

.student-id-card .id-card-rail-bottom {
    font-size: 0.52rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    color: rgba(255, 255, 255, 0.55);
    writing-mode: vertical-rl;
    transform: rotate(180deg);
}

.student-id-card .id-card-main {
    display: flex;
    flex-direction: column;
    min-width: 0;
    background:
        linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}

.student-id-card .id-card-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 16px 20px 12px;
    border-bottom: 1px solid #e2e8f0;
}

.student-id-card .id-card-org {
    font-size: 0.68rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #1e3a8a;
}

.student-id-card .id-card-doc {
    margin-top: 3px;
    font-size: 0.78rem;
    font-weight: 600;
    color: #64748b;
}

.student-id-card .id-card-chip {
    width: 42px;
    height: 32px;
    border-radius: 6px;
    background: linear-gradient(135deg, #d4af37 0%, #f5e6a3 45%, #b8860b 100%);
    border: 1px solid rgba(146, 112, 18, 0.35);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2px;
    padding: 4px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.45);
    flex-shrink: 0;
}

.student-id-card .id-card-chip span {
    background: rgba(120, 84, 10, 0.18);
    border-radius: 1px;
}

.student-id-card .id-card-content {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 148px;
    gap: 18px;
    padding: 16px 20px;
    min-height: 0;
}

.student-id-card .id-card-identity {
    display: flex;
    gap: 14px;
    min-width: 0;
}

.student-id-card .id-card-photo {
    flex-shrink: 0;
    padding: 4px;
    border-radius: 12px;
    background: #fff;
    border: 1px solid #dbe3ef;
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.06);
}

.student-id-card .id-card-avatar {
    width: 84px;
    height: 100px;
    border-radius: 8px;
    background:
        linear-gradient(160deg, #1e3a8a 0%, #1e293b 100%);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.55rem;
    font-weight: 800;
    letter-spacing: 0.06em;
}

.student-id-card .id-card-details {
    min-width: 0;
    flex: 1;
}

.student-id-card .id-card-kicker {
    font-size: 0.62rem;
    font-weight: 800;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: #94a3b8;
    margin-bottom: 4px;
}

.student-id-card .id-card-name {
    margin: 0;
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.15;
    color: #0f172a;
    word-break: break-word;
}

.student-id-card .id-card-divider {
    width: 42px;
    height: 3px;
    border-radius: 99px;
    background: #1e3a8a;
    margin: 10px 0 12px;
}

.student-id-card .id-card-grid {
    margin: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px 16px;
}

.student-id-card .id-card-grid dt {
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #94a3b8;
    margin-bottom: 2px;
}

.student-id-card .id-card-grid dd {
    margin: 0;
    font-size: 0.82rem;
    font-weight: 700;
    color: #334155;
    line-height: 1.25;
    word-break: break-word;
}

.student-id-card .id-card-scan {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 10px;
    border-radius: 14px;
    background: #fff;
    border: 1px solid #dbe3ef;
    box-shadow: 0 6px 16px rgba(15, 23, 42, 0.05);
}

.student-id-card .id-card-qr-wrap {
    width: 118px;
    height: 118px;
    padding: 6px;
    border-radius: 10px;
    background: #fff;
    border: 1px solid #e2e8f0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.student-id-card .id-card-qr-img {
    width: 106px;
    height: 106px;
    object-fit: contain;
    display: block;
}

.student-id-card .id-card-scan-label {
    margin-top: 8px;
    font-size: 0.58rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #1e3a8a;
}

.student-id-card .id-card-scan-code {
    margin-top: 3px;
    font-size: 0.7rem;
    font-weight: 700;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    color: #64748b;
    letter-spacing: 0.05em;
}

.student-id-card .id-card-bottom {
    margin-top: auto;
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: flex-end;
    padding: 12px 20px 14px;
    border-top: 1px solid #e2e8f0;
    background: linear-gradient(180deg, #f8fafc, #f1f5f9);
}

.student-id-card .id-card-bottom-left {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.student-id-card .id-card-bottom-left strong {
    font-size: 0.68rem;
    font-weight: 800;
    color: #1e293b;
}

.student-id-card .id-card-bottom-left span {
    font-size: 0.62rem;
    font-weight: 500;
    color: #64748b;
}

.student-id-card .id-card-bottom-right {
    text-align: right;
    flex-shrink: 0;
}

.student-id-card .id-card-sig-label {
    display: block;
    font-size: 0.55rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: #94a3b8;
}

.student-id-card .id-card-sig {
    display: inline-block;
    margin-top: 2px;
    font-size: 0.78rem;
    font-weight: 700;
    font-style: italic;
    color: #1e3a8a;
    border-bottom: 1px solid #cbd5e1;
    padding: 0 4px 2px;
}

@media (max-width: 700px) {
    .student-id-card {
        grid-template-columns: 1fr;
        aspect-ratio: auto;
        min-height: 0;
    }

    .student-id-card .id-card-rail {
        flex-direction: row;
        justify-content: space-between;
        padding: 14px 16px;
        gap: 12px;
    }

    .student-id-card .id-card-rail-mid,
    .student-id-card .id-card-rail-bottom {
        writing-mode: horizontal-tb;
        transform: none;
        flex-direction: row;
        gap: 8px;
    }

    .student-id-card .id-card-rail-top {
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .student-id-card .id-card-rail-mark {
        margin: 0;
        width: 36px;
        height: 36px;
    }

    .student-id-card .id-card-content {
        grid-template-columns: 1fr;
    }

    .student-id-card .id-card-scan {
        width: 100%;
    }

    .student-id-card .id-card-grid {
        grid-template-columns: 1fr;
    }
}