/* ==========================================================================
   IT Dashboard Design System & Stylesheet
   Faculty of Nursing, Mahidol University
   ========================================================================== */

/* --------------------------------------------------------------------------
   Design Tokens & CSS Variables
   -------------------------------------------------------------------------- */
:root {
    /* Brand & Surface Colors (Mahidol University Institutional Palette) */
    --color-primary: #3b82f6;
    --color-primary-hover: #2563eb;
    --color-primary-light: #60a5fa;
    --color-brand-deep: #1e3a8a;
    --color-accent-purple: #7c3aed;

    /* Backgrounds & Glass Surfaces */
    --bg-page-gradient: linear-gradient(135deg, #1e1b4b 0%, #0f172a 50%, #090d16 100%);
    --surface-glass: rgba(255, 255, 255, 0.08);
    --surface-glass-hover: rgba(255, 255, 255, 0.14);
    --surface-glass-active: rgba(255, 255, 255, 0.20);
    --surface-glass-border: rgba(255, 255, 255, 0.18);
    --surface-glass-border-hover: rgba(255, 255, 255, 0.35);
    --surface-overlay: rgba(0, 0, 0, 0.4);

    /* Text & Contrast (WCAG AA compliant >= 4.5:1) */
    --text-primary: #ffffff;
    --text-secondary: #e2e8f0;
    --text-muted: #94a3b8;
    --text-placeholder: #94a3b8;

    /* Status Colors (Calibrated for dark mode contrast) */
    --status-success-bg: rgba(16, 185, 129, 0.18);
    --status-success-text: #6ee7b7;
    --status-success-border: rgba(16, 185, 129, 0.4);

    --status-warning-bg: rgba(245, 158, 11, 0.18);
    --status-warning-text: #fde047;
    --status-warning-border: rgba(245, 158, 11, 0.4);

    --status-danger-bg: rgba(239, 68, 68, 0.18);
    --status-danger-text: #fca5a5;
    --status-danger-border: rgba(239, 68, 68, 0.4);

    --status-info-bg: rgba(59, 130, 246, 0.18);
    --status-info-text: #93c5fd;
    --status-info-border: rgba(59, 130, 246, 0.4);

    /* Spacing & Layout */
    --container-max-width: 1400px;
    --touch-min-size: 44px;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 18px;

    /* Shadows & Depths */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.4);
    --focus-ring: 0 0 0 3px rgba(96, 165, 250, 0.55);

    /* Typography */
    --font-main: 'Kanit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --transition-fast: 0.18s ease;
    --transition-normal: 0.25s ease;
}

/* --------------------------------------------------------------------------
   Reset & Accessibility Essentials
   -------------------------------------------------------------------------- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    color-scheme: dark;
}

body {
    font-family: var(--font-main);
    background: var(--bg-page-gradient);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Browser Surfaces (Selection & Scrollbar) */
::selection {
    background: var(--color-primary);
    color: #ffffff;
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.25);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.4);
}

/* Accessible Focus Visible Ring */
:focus-visible {
    outline: 2px solid var(--color-primary-light);
    outline-offset: 2px;
}

/* Skip Navigation Link */
.skip-link {
    position: absolute;
    top: -100px;
    left: 1rem;
    background: var(--color-primary);
    color: #ffffff;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    z-index: 9999;
    transition: top 0.2s ease;
}

.skip-link:focus {
    top: 1rem;
}

/* Screen Reader Only Utility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* --------------------------------------------------------------------------
   Header & Navigation
   -------------------------------------------------------------------------- */
.header {
    background: var(--surface-overlay);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 0.85rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--surface-glass-border);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.header-title {
    font-size: 1.35rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.65rem;
    letter-spacing: -0.01em;
}

.header-icon {
    font-size: 1.8rem;
    line-height: 1;
}

.nav {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.55rem 1.35rem;
    min-height: var(--touch-min-size);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    background: var(--surface-glass);
    border: 1px solid transparent;
    font-size: 0.95rem;
    font-weight: 500;
}

.nav-link:hover {
    background: var(--surface-glass-hover);
    color: #ffffff;
    border-color: var(--surface-glass-border);
    transform: translateY(-1px);
}

.nav-link.active {
    background: linear-gradient(135deg, var(--color-brand-deep) 0%, var(--color-primary) 100%);
    color: #ffffff;
    border-color: var(--surface-glass-border-hover);
    box-shadow: 0 2px 10px rgba(59, 130, 246, 0.3);
}

.nav-link-logout {
    background: var(--status-danger-bg) !important;
    color: var(--status-danger-text) !important;
    border: 1px solid var(--status-danger-border) !important;
}

.nav-link-logout:hover {
    background: rgba(239, 68, 68, 0.3) !important;
    color: #ffffff !important;
}

/* --------------------------------------------------------------------------
   Main Layout & Page Header
   -------------------------------------------------------------------------- */
.main-content {
    padding: 2.5rem 0;
    min-height: calc(100vh - 190px);
}

.page-header {
    text-align: center;
    margin-bottom: 2.25rem;
}

.page-title {
    font-size: 2.1rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
    letter-spacing: -0.02em;
}

.page-subtitle {
    font-size: 1.05rem;
    color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   Dashboard Menu Grid
   -------------------------------------------------------------------------- */
.menu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.menu-card {
    background: var(--surface-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: 1.85rem;
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    border: 1px solid var(--surface-glass-border);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.menu-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.12) 0%, rgba(59, 130, 246, 0.12) 100%);
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
}

.menu-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--surface-glass-border-hover);
}

.menu-card:hover::before {
    opacity: 1;
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: block;
    line-height: 1;
}

.card-title {
    font-size: 1.15rem;
    font-weight: 500;
    margin-bottom: 1.25rem;
    line-height: 1.45;
    color: var(--text-primary);
}

.card-badge {
    display: inline-block;
    align-self: flex-start;
    background: var(--status-info-bg);
    color: var(--status-info-text);
    border: 1px solid var(--status-info-border);
    padding: 0.35rem 0.85rem;
    border-radius: var(--radius-xl);
    font-size: 0.88rem;
    font-weight: 500;
}

.card-badge.external {
    background: var(--status-info-bg);
    color: var(--status-info-text);
    border-color: var(--status-info-border);
}

.card-badge.success {
    background: var(--status-success-bg);
    color: var(--status-success-text);
    border-color: var(--status-success-border);
}

.card-arrow {
    position: absolute;
    bottom: 1.5rem;
    right: 1.5rem;
    font-size: 1.6rem;
    color: var(--text-muted);
    transition: transform var(--transition-fast), color var(--transition-fast);
}

.menu-card:hover .card-arrow {
    transform: translateX(3px);
    color: #ffffff;
}

/* --------------------------------------------------------------------------
   Detail Pages & Back Button
   -------------------------------------------------------------------------- */
.detail-page {
    position: relative;
}

.back-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 1.15rem;
    min-height: var(--touch-min-size);
    background: var(--surface-glass);
    border: 1px solid var(--surface-glass-border);
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    font-weight: 500;
    transition: all var(--transition-normal);
}

.back-button:hover {
    background: var(--surface-glass-hover);
    color: #ffffff;
    border-color: var(--surface-glass-border-hover);
    transform: translateX(-3px);
}

/* --------------------------------------------------------------------------
   Stats Grid
   -------------------------------------------------------------------------- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--surface-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius-md);
    padding: 1.4rem;
    text-align: center;
    border: 1px solid var(--surface-glass-border);
    transition: transform var(--transition-fast);
}

.stat-card:hover {
    transform: translateY(-2px);
    border-color: var(--surface-glass-border-hover);
}

.stat-card.success {
    border-color: var(--status-success-border);
    background: var(--status-success-bg);
}

.stat-card.warning {
    border-color: var(--status-warning-border);
    background: var(--status-warning-bg);
}

.stat-card.danger {
    border-color: var(--status-danger-border);
    background: var(--status-danger-bg);
}

.stat-icon {
    font-size: 2rem;
    margin-bottom: 0.4rem;
    display: block;
    line-height: 1;
}

.stat-value {
    font-size: 1.95rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    letter-spacing: -0.01em;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   Charts Section
   -------------------------------------------------------------------------- */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.chart-card {
    background: var(--surface-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    border: 1px solid var(--surface-glass-border);
}

.chart-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    text-align: center;
    color: var(--text-primary);
}

/* --------------------------------------------------------------------------
   Table & Data Grid
   -------------------------------------------------------------------------- */
.table-card {
    background: var(--surface-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    border: 1px solid var(--surface-glass-border);
    margin-bottom: 2rem;
}

.table-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.table-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.table-card-header .table-title {
    margin-bottom: 0;
}

.page-info {
    font-size: 0.92rem;
    color: var(--text-muted);
}

.table-container {
    overflow-x: auto;
    border-radius: var(--radius-sm);
    border: 1px solid var(--surface-glass-border);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
    text-align: left;
}

.data-table thead {
    background: rgba(0, 0, 0, 0.35);
}

.data-table th {
    padding: 0.85rem 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 2px solid var(--surface-glass-border);
    white-space: nowrap;
}

.data-table td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-secondary);
    vertical-align: middle;
}

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

.data-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.06);
}

.text-center {
    text-align: center;
}

/* Status message in tables */
.status-loading {
    color: var(--text-muted);
    padding: 2.5rem !important;
}

.status-error {
    color: var(--status-danger-text) !important;
    padding: 2.5rem !important;
}

.status-empty {
    color: var(--text-muted) !important;
    padding: 2.5rem !important;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.3rem 0.75rem;
    border-radius: var(--radius-xl);
    font-size: 0.85rem;
    font-weight: 500;
}

.badge.success {
    background: var(--status-success-bg);
    color: var(--status-success-text);
    border: 1px solid var(--status-success-border);
}

.badge.warning {
    background: var(--status-warning-bg);
    color: var(--status-warning-text);
    border: 1px solid var(--status-warning-border);
}

.badge.danger {
    background: var(--status-danger-bg);
    color: var(--status-danger-text);
    border: 1px solid var(--status-danger-border);
}

/* Row Actions in Admin Table */
.row-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.btn-action {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    min-height: 38px;
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    font-family: var(--font-main);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    background: var(--surface-glass);
    color: var(--text-secondary);
    border: 1px solid var(--surface-glass-border);
}

.btn-action:hover {
    color: #ffffff;
    transform: translateY(-1px);
}

.btn-edit:hover {
    background: var(--status-info-bg);
    border-color: var(--status-info-border);
    color: var(--status-info-text);
}

.btn-delete:hover {
    background: var(--status-danger-bg);
    border-color: var(--status-danger-border);
    color: var(--status-danger-text);
}

/* Table Footer & Pagination */
.table-footer {
    margin-top: 1.5rem;
    text-align: center;
}

.table-pagination-footer {
    margin-top: 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.pagination-buttons {
    display: flex;
    gap: 0.5rem;
}

.btn-pagination {
    min-height: 40px;
    padding: 0.4rem 1rem;
    font-size: 0.92rem;
}

.btn-pagination:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none !important;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, var(--color-brand-deep) 0%, var(--color-primary) 100%);
    color: #ffffff;
    padding: 0.65rem 1.5rem;
    min-height: var(--touch-min-size);
    border-radius: var(--radius-md);
    text-decoration: none;
    border: 1px solid rgba(255, 255, 255, 0.2);
    cursor: pointer;
    font-family: var(--font-main);
    font-size: 1rem;
    font-weight: 500;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(59, 130, 246, 0.4);
    border-color: rgba(255, 255, 255, 0.4);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--surface-glass);
    color: var(--text-secondary);
    padding: 0.65rem 1.5rem;
    min-height: var(--touch-min-size);
    border-radius: var(--radius-md);
    text-decoration: none;
    border: 1px solid var(--surface-glass-border);
    cursor: pointer;
    font-family: var(--font-main);
    font-size: 1rem;
    font-weight: 500;
    transition: all var(--transition-normal);
}

.btn-secondary:hover {
    background: var(--surface-glass-hover);
    color: #ffffff;
    border-color: var(--surface-glass-border-hover);
}

.btn-reset {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    background: var(--surface-glass);
    color: var(--text-secondary);
    padding: 0.55rem 1.25rem;
    min-height: var(--touch-min-size);
    border-radius: var(--radius-md);
    border: 1px solid var(--surface-glass-border);
    cursor: pointer;
    font-family: var(--font-main);
    font-size: 0.95rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.btn-reset:hover {
    background: var(--surface-glass-hover);
    color: #ffffff;
    border-color: var(--surface-glass-border-hover);
    transform: translateY(-1px);
}

/* --------------------------------------------------------------------------
   Filter Bar
   -------------------------------------------------------------------------- */
.filter-bar {
    background: var(--surface-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius-md);
    padding: 1rem 1.5rem;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.85rem;
    flex-wrap: wrap;
    border: 1px solid var(--surface-glass-border);
}

.filter-label {
    font-size: 0.98rem;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.year-select,
.date-input {
    background: rgba(15, 23, 42, 0.65);
    border: 1px solid var(--surface-glass-border);
    color: var(--text-primary);
    padding: 0.55rem 1.15rem;
    min-height: var(--touch-min-size);
    border-radius: var(--radius-md);
    font-family: var(--font-main);
    font-size: 0.95rem;
    cursor: pointer;
    transition: border-color var(--transition-fast), background var(--transition-fast);
}

.year-select {
    padding-right: 2.25rem;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1.1em;
}

.year-select:hover,
.date-input:hover {
    border-color: var(--surface-glass-border-hover);
    background-color: rgba(15, 23, 42, 0.85);
}

.year-select option {
    background-color: #0f172a;
    color: #ffffff;
    padding: 0.5rem;
}

.date-input::-webkit-calendar-picker-indicator {
    filter: invert(1);
    cursor: pointer;
}

.filter-search-input {
    min-width: 220px;
}

/* --------------------------------------------------------------------------
   Admin Panel Controls
   -------------------------------------------------------------------------- */
.admin-module-bar {
    background: var(--surface-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius-md);
    padding: 0.85rem;
    margin-bottom: 1.5rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    border: 1px solid var(--surface-glass-border);
}

.module-tab {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid transparent;
    padding: 0.75rem 1.25rem;
    min-height: var(--touch-min-size);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-family: var(--font-main);
    font-size: 0.95rem;
    font-weight: 500;
    transition: all var(--transition-normal);
    flex: 1;
    min-width: 180px;
    text-align: center;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.module-tab:hover {
    background: var(--surface-glass-hover);
    color: #ffffff;
    border-color: var(--surface-glass-border);
}

.module-tab.active {
    background: linear-gradient(135deg, var(--color-brand-deep) 0%, var(--color-primary) 100%);
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.35);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.35);
}

.admin-action-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    gap: 1rem;
    flex-wrap: wrap;
}

.search-wrapper {
    position: relative;
    flex-grow: 1;
    max-width: 380px;
}

.search-input {
    width: 100%;
    padding: 0.65rem 1.15rem;
    min-height: var(--touch-min-size);
    border-radius: var(--radius-md);
    border: 1px solid var(--surface-glass-border);
    background: rgba(15, 23, 42, 0.65);
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 0.95rem;
    transition: border-color var(--transition-fast);
}

.search-input:focus {
    border-color: var(--color-primary-light);
}

.search-input::placeholder {
    color: var(--text-placeholder);
}

/* --------------------------------------------------------------------------
   Accessible Modal Dialog
   -------------------------------------------------------------------------- */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(5, 8, 16, 0.75);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: linear-gradient(145deg, #1e1b4b 0%, #0f172a 100%);
    border-radius: var(--radius-lg);
    max-width: 620px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    border: 1px solid var(--surface-glass-border-hover);
    box-shadow: var(--shadow-lg);
}

.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--surface-glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.3rem;
    font-weight: 600;
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.75rem;
    cursor: pointer;
    line-height: 1;
    width: var(--touch-min-size);
    height: var(--touch-min-size);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background var(--transition-fast);
}

.modal-close:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.1);
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1.25rem 1.5rem;
    border-top: 1px solid var(--surface-glass-border);
    display: flex;
    justify-content: flex-end;
    gap: 0.85rem;
}

/* --------------------------------------------------------------------------
   Forms & Controls
   -------------------------------------------------------------------------- */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.45rem;
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.required-indicator {
    color: var(--status-danger-text);
    margin-left: 0.25rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    min-height: var(--touch-min-size);
    border-radius: var(--radius-md);
    border: 1px solid var(--surface-glass-border);
    background: rgba(15, 23, 42, 0.75);
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 0.98rem;
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-primary-light);
}

.form-group textarea {
    resize: vertical;
    min-height: 90px;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-placeholder);
}

.form-group select {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.85rem center;
    background-size: 1.1em;
    padding-right: 2.5rem;
}

.form-group select option {
    background-color: #0f172a;
    color: #ffffff;
    padding: 0.5rem;
}

/* --------------------------------------------------------------------------
   Toast Notifications
   -------------------------------------------------------------------------- */
.toast-container {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 3000;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-width: 420px;
    width: calc(100vw - 3rem);
    pointer-events: none;
}

.toast-item {
    pointer-events: auto;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--surface-glass-border-hover);
    border-radius: var(--radius-md);
    padding: 0.85rem 1.15rem;
    color: #ffffff;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.25s ease, transform 0.25s ease;
}

.toast-item.toast-visible {
    opacity: 1;
    transform: translateY(0);
}

.toast-item.toast-hiding {
    opacity: 0;
    transform: translateY(8px);
}

.toast-icon {
    font-size: 1.15rem;
    line-height: 1;
    flex-shrink: 0;
}

.toast-message {
    flex-grow: 1;
    font-size: 0.95rem;
}

.toast-close {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.3rem;
    cursor: pointer;
    line-height: 1;
    padding: 0.2rem;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
}

.toast-close:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.1);
}

.toast-success {
    border-color: var(--status-success-border);
}
.toast-success .toast-icon {
    color: var(--status-success-text);
}

.toast-error {
    border-color: var(--status-danger-border);
}
.toast-error .toast-icon {
    color: var(--status-danger-text);
}

/* --------------------------------------------------------------------------
   Admin Login Card
   -------------------------------------------------------------------------- */
.login-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 280px);
    padding: 2rem 0;
}

.login-card {
    background: var(--surface-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: var(--radius-xl);
    padding: 2.75rem 2.25rem;
    width: 100%;
    max-width: 460px;
    border: 1px solid var(--surface-glass-border-hover);
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.login-icon {
    font-size: 3rem;
    margin-bottom: 0.85rem;
    display: inline-block;
}

.login-title {
    font-size: 1.65rem;
    font-weight: 700;
    margin-bottom: 0.45rem;
}

.login-subtitle {
    font-size: 0.98rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    line-height: 1.5;
}

.login-form {
    text-align: left;
}

.btn-block {
    display: flex;
    width: 100%;
    margin-top: 1.5rem;
    font-size: 1.05rem;
}

.alert-danger {
    background: var(--status-danger-bg);
    border: 1px solid var(--status-danger-border);
    color: var(--status-danger-text);
    padding: 0.85rem 1.15rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.65rem;
    font-size: 0.95rem;
    text-align: left;
}

.alert-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

/* Microsoft Sign-In Button & Login Extras */
.login-action-box {
    margin-top: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.login-instruction {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
}

.btn-microsoft {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.85rem;
    background: #ffffff;
    color: #1e293b;
    font-family: var(--font-main);
    font-size: 1.05rem;
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    min-height: 48px;
    border-radius: var(--radius-md);
    text-decoration: none;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
    transition: all var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.4);
}

.btn-microsoft:hover {
    background: #f8fafc;
    color: #0f172a;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
}

.microsoft-logo {
    flex-shrink: 0;
}

.login-hint {
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
}

.login-hint code {
    color: var(--color-primary-light);
    background: rgba(15, 23, 42, 0.6);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
}

/* User Profile in Header */
.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-info {
    display: flex;
    flex-direction: column;
    text-align: right;
    line-height: 1.2;
}

.user-name {
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--text-primary);
}

.user-role-badge {
    font-size: 0.75rem;
    color: var(--status-success-text);
    background: var(--status-success-bg);
    border: 1px solid var(--status-success-border);
    padding: 0.1rem 0.45rem;
    border-radius: 10px;
    align-self: flex-end;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    background: var(--surface-overlay);
    border-top: 1px solid var(--surface-glass-border);
    padding: 1.75rem 0;
    text-align: center;
    margin-top: 3.5rem;
    color: var(--text-muted);
    font-size: 0.92rem;
}

/* --------------------------------------------------------------------------
   Responsive Breakpoints
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
    .module-tab {
        flex: 1 1 calc(50% - 0.25rem);
        min-width: auto;
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        align-items: stretch;
    }

    .nav {
        width: 100%;
    }

    .nav-link {
        flex: 1;
        text-align: center;
    }

    .menu-grid {
        grid-template-columns: 1fr;
    }

    .charts-grid {
        grid-template-columns: 1fr;
    }

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

    .module-tab {
        flex: 1 1 calc(50% - 0.25rem);
        min-width: auto;
        font-size: 0.88rem;
        padding: 0.65rem 0.85rem;
    }

    .filter-bar {
        padding: 1rem;
    }

    .filter-search-input {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .header-title {
        font-size: 1.15rem;
    }

    .nav-link {
        padding: 0.5rem 0.75rem;
        font-size: 0.88rem;
    }

    .page-title {
        font-size: 1.65rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .module-tab {
        flex: 1 1 100%;
        font-size: 0.92rem;
    }

    .admin-action-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .search-wrapper {
        max-width: 100%;
        width: 100%;
    }

    .search-input {
        width: 100%;
    }

    .btn-primary, .btn-secondary {
        width: 100%;
    }

    .table-pagination-footer {
        flex-direction: column;
        align-items: stretch;
    }

    .pagination-buttons {
        width: 100%;
    }

    .pagination-buttons button {
        flex: 1;
    }
}

/* --------------------------------------------------------------------------
   Motion Sensitivity (Accessibility)
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .menu-card:hover,
    .stat-card:hover,
    .btn-primary:hover,
    .btn-action:hover,
    .nav-link:hover,
    .back-button:hover {
        transform: none !important;
    }
}