/**
 * Peg Ledger Stylesheet
 *
 * Design: Contemporary country estate - clean, modern, professional
 * Palette: English countryside - muted greens, warm earth tones, soft creams
 */

/* ============================================================================
   CSS Variables / Design Tokens
   ============================================================================ */

:root {
    /* Primary Colors */
    --color-primary: #3D5A3E;
    --color-primary-dark: #2D4630;
    --color-primary-light: #4D6A4E;

    /* Secondary Colors */
    --color-secondary: #8B7355;
    --color-secondary-dark: #6B5A45;
    --color-secondary-light: #A08565;

    /* Backgrounds */
    --color-bg: #FAF8F5;
    --color-surface: #FFFFFF;
    --color-surface-alt: #F5F3F0;

    /* Text */
    --color-text: #2C2C2C;
    --color-text-muted: #666666;
    --color-text-light: #888888;

    /* Borders */
    --color-border: #E0D8CF;
    --color-border-dark: #C5BDB4;

    /* Status Colors */
    --color-success: #3D7A4E;
    --color-success-bg: #E8F5E9;
    --color-warning: #C4950C;
    --color-warning-bg: #FFF8E1;
    --color-danger: #C44E4E;
    --color-danger-bg: #FFEBEE;
    --color-info: #4E7A9C;
    --color-info-bg: #E3F2FD;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 15px;
    --font-size-sm: 13px;
    --font-size-xs: 11px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-2xl: 32px;
    --line-height: 1.6;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.1);

    /* Layout */
    --sidebar-width: 240px;
    --sidebar-collapsed-width: 60px;
    --header-height: 60px;
    --max-content-width: 1200px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
}

/* ============================================================================
   Reset & Base Styles
   ============================================================================ */

*, *::before, *::after {
    box-sizing: border-box;
}

html {
    font-size: var(--font-size-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height);
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
    margin: 0 0 var(--spacing-md);
    font-weight: var(--font-weight-semibold);
    line-height: 1.3;
    color: var(--color-text);
}

h1 { font-size: var(--font-size-2xl); }
h2 { font-size: var(--font-size-xl); }
h3 { font-size: var(--font-size-lg); }
h4 { font-size: var(--font-size-base); }

p {
    margin: 0 0 var(--spacing-md);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

img {
    max-width: 100%;
    height: auto;
}

/* ============================================================================
   Layout Structure
   ============================================================================ */

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

.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background-color: var(--color-primary);
    color: #FFFFFF;
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: transform var(--transition-base);
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.page-header {
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-lg) var(--spacing-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

.page-content {
    flex: 1;
    padding: var(--spacing-xl);
    max-width: var(--max-content-width);
}

.page-content.full-width {
    max-width: none;
}

/* ============================================================================
   Sidebar Navigation
   ============================================================================ */

.sidebar-logo {
    padding: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-logo a {
    color: #FFFFFF;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
}

.sidebar-nav {
    flex: 1;
    padding: var(--spacing-md) 0;
    overflow-y: auto;
}

.nav-section {
    margin-bottom: var(--spacing-md);
}

.nav-section-title {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: rgba(255, 255, 255, 0.5);
    font-weight: var(--font-weight-medium);
}

.nav-item {
    display: block;
    padding: var(--spacing-sm) var(--spacing-lg);
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: #FFFFFF;
    text-decoration: none;
}

.nav-item.active {
    background-color: rgba(255, 255, 255, 0.15);
    color: #FFFFFF;
    border-left-color: #FFFFFF;
}

.nav-item svg {
    width: 18px;
    height: 18px;
    margin-right: var(--spacing-sm);
    vertical-align: middle;
    opacity: 0.8;
}

.sidebar-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: var(--font-size-sm);
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-sm);
}

.sidebar-user-name {
    font-weight: var(--font-weight-medium);
}

.sidebar-logout {
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-sm);
}

.sidebar-logout:hover {
    color: #FFFFFF;
}

/* Mobile Navigation Toggle */
.mobile-nav-toggle {
    display: none;
    position: fixed;
    top: var(--spacing-md);
    left: var(--spacing-md);
    z-index: 200;
    background-color: var(--color-primary);
    color: #FFFFFF;
    border: none;
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    font-size: var(--font-size-base);
}

.mobile-nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 99;
}

/* ============================================================================
   Page Header
   ============================================================================ */

.page-title {
    margin: 0;
    font-size: var(--font-size-xl);
}

.page-subtitle {
    margin: var(--spacing-xs) 0 0;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.page-actions {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.breadcrumb a {
    color: var(--color-text-muted);
}

.breadcrumb a:hover {
    color: var(--color-primary);
}

.breadcrumb-separator {
    color: var(--color-border-dark);
}

/* ============================================================================
   Cards & Panels
   ============================================================================ */

.card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

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

.card-title {
    margin: 0;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
}

.card-body {
    padding: var(--spacing-lg);
}

.card-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    background-color: var(--color-surface-alt);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

/* ============================================================================
   Buttons
   ============================================================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    line-height: 1.5;
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn:hover {
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background-color: var(--color-primary);
    color: #FFFFFF;
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    color: #FFFFFF;
}

.btn-secondary {
    background-color: var(--color-secondary);
    color: #FFFFFF;
}

.btn-secondary:hover {
    background-color: var(--color-secondary-dark);
    color: #FFFFFF;
}

.btn-outline {
    background-color: transparent;
    border-color: var(--color-border-dark);
    color: var(--color-text);
}

.btn-outline:hover {
    background-color: var(--color-surface-alt);
    color: var(--color-text);
}

.btn-danger {
    background-color: var(--color-danger);
    color: #FFFFFF;
}

.btn-danger:hover {
    background-color: #A03E3E;
    color: #FFFFFF;
}

.btn-success {
    background-color: var(--color-success);
    color: #FFFFFF;
}

.btn-success:hover {
    background-color: #2D6A3E;
    color: #FFFFFF;
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
}

.btn-icon {
    padding: var(--spacing-sm);
}

.btn-icon svg {
    width: 18px;
    height: 18px;
}

/* ============================================================================
   Forms
   ============================================================================ */

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-sm);
    color: var(--color-text);
}

.form-label-required::after {
    content: ' *';
    color: var(--color-danger);
}

.form-hint {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.form-control {
    display: block;
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(61, 90, 62, 0.15);
}

.form-control:disabled {
    background-color: var(--color-surface-alt);
    cursor: not-allowed;
}

.form-control.error {
    border-color: var(--color-danger);
}

.form-control.error:focus {
    box-shadow: 0 0 0 3px rgba(196, 78, 78, 0.15);
}

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

select.form-control {
    cursor: pointer;
}

.form-check {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
    width: 18px;
    height: 18px;
    accent-color: var(--color-primary);
}

.form-check-label {
    font-size: var(--font-size-base);
    cursor: pointer;
}

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

.form-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.form-error {
    color: var(--color-danger);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

/* ============================================================================
   Tables
   ============================================================================ */

.table-wrapper {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.table th,
.table td {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.table th:first-child,
.table td:first-child {
    padding-left: var(--spacing-lg);
}

.table th:last-child,
.table td:last-child {
    padding-right: var(--spacing-lg);
}

.table th {
    font-weight: var(--font-weight-medium);
    color: var(--color-text-muted);
    background-color: var(--color-surface-alt);
    white-space: nowrap;
}

.table th a {
    color: var(--color-text-muted);
    text-decoration: none;
}

.table th a:hover {
    color: var(--color-primary);
}

.table th.sortable {
    cursor: pointer;
}

.table th.sorted-asc::after {
    content: ' ↑';
}

.table th.sorted-desc::after {
    content: ' ↓';
}

.table tbody tr:hover {
    background-color: var(--color-surface-alt);
}

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

.table td.actions {
    white-space: nowrap;
    text-align: right;
}

.table td.numeric,
.table th.numeric {
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.table-empty {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--color-text-muted);
}

/* ============================================================================
   Badges & Status Indicators
   ============================================================================ */

.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px var(--spacing-sm);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.badge-primary {
    background-color: var(--color-primary);
    color: #FFFFFF;
}

.badge-secondary {
    background-color: var(--color-text-muted);
    color: #FFFFFF;
}

.badge-success {
    background-color: var(--color-success);
    color: #FFFFFF;
}

.badge-warning {
    background-color: var(--color-warning);
    color: #FFFFFF;
}

.badge-danger {
    background-color: var(--color-danger);
    color: #FFFFFF;
}

.badge-info {
    background-color: var(--color-info);
    color: #FFFFFF;
}

.badge-outline {
    background-color: transparent;
    border: 1px solid var(--color-border-dark);
    color: var(--color-text-muted);
}

/* Active/Inactive indicators */
.status-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: var(--spacing-xs);
}

.status-dot.active {
    background-color: var(--color-success);
}

.status-dot.inactive {
    background-color: var(--color-text-light);
}

/* ============================================================================
   Alerts & Flash Messages
   ============================================================================ */

.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

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

.alert-error {
    background-color: var(--color-danger-bg);
    color: var(--color-danger);
    border: 1px solid var(--color-danger);
}

.alert-warning {
    background-color: var(--color-warning-bg);
    color: #8B6914;
    border: 1px solid var(--color-warning);
}

.alert-info {
    background-color: var(--color-info-bg);
    color: var(--color-info);
    border: 1px solid var(--color-info);
}

.flash-messages {
    padding: 0 var(--spacing-xl);
}

/* ============================================================================
   Pagination
   ============================================================================ */

.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-lg);
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    color: var(--color-text);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.pagination a:hover {
    background-color: var(--color-surface-alt);
    border-color: var(--color-border-dark);
    text-decoration: none;
}

.pagination .current {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: #FFFFFF;
}

.pagination .disabled {
    color: var(--color-text-light);
    cursor: not-allowed;
}

/* ============================================================================
   Search & Filters
   ============================================================================ */

.search-bar {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.search-input {
    flex: 1;
    max-width: 320px;
}

.filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background-color: var(--color-surface-alt);
    border-radius: var(--radius-md);
}

.filter-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.filter-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    white-space: nowrap;
}

.filter-select {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-sm);
}

/* ============================================================================
   Empty States
   ============================================================================ */

.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--color-text-muted);
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.empty-state-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.empty-state-description {
    margin-bottom: var(--spacing-lg);
}

/* ============================================================================
   Stats Cards (Dashboard)
   ============================================================================ */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
}

.stat-value {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    line-height: 1.2;
}

.stat-change {
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

.stat-change.positive {
    color: var(--color-success);
}

.stat-change.negative {
    color: var(--color-danger);
}

/* ============================================================================
   Client Profile
   ============================================================================ */

.profile-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-xl);
}

.profile-info {
    flex: 1;
}

.profile-name {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-xs);
}

.profile-meta {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.profile-section {
    margin-bottom: var(--spacing-xl);
}

.profile-section-title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
}

.detail-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.detail-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.detail-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.detail-value {
    font-size: var(--font-size-base);
}

/* Notes Section */
.notes-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.note-item {
    padding: var(--spacing-md);
    background-color: var(--color-surface-alt);
    border-radius: var(--radius-md);
    position: relative;
}

.note-content {
    margin-bottom: var(--spacing-sm);
    white-space: pre-wrap;
}

.note-meta {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.note-delete {
    color: var(--color-danger);
    font-size: var(--font-size-sm);
    cursor: pointer;
}

.note-delete:hover {
    text-decoration: underline;
}

/* ============================================================================
   Pricing Matrix (Day Types)
   ============================================================================ */

.pricing-matrix {
    overflow-x: auto;
}

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

.pricing-matrix th,
.pricing-matrix td {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    text-align: center;
}

.pricing-matrix th {
    background-color: var(--color-surface-alt);
    font-weight: var(--font-weight-medium);
}

.pricing-matrix th:first-child,
.pricing-matrix td:first-child {
    text-align: left;
    font-weight: var(--font-weight-medium);
}

.pricing-matrix input {
    width: 100px;
    text-align: right;
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
}

.pricing-matrix input:focus {
    outline: none;
    border-color: var(--color-primary);
}

/* ============================================================================
   Reordering (Drag handles)
   ============================================================================ */

.sortable-handle {
    cursor: grab;
    color: var(--color-text-light);
    padding: var(--spacing-xs);
}

.sortable-handle:hover {
    color: var(--color-text);
}

.sortable-item.dragging {
    opacity: 0.5;
}

/* ============================================================================
   Login Page
   ============================================================================ */

.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    background-color: var(--color-bg);
}

.login-card {
    width: 100%;
    max-width: 400px;
    background-color: var(--color-surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-2xl);
}

.login-logo {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.login-logo h1 {
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    margin: 0;
}

.login-title {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.login-form .form-group {
    margin-bottom: var(--spacing-md);
}

.login-form .btn {
    width: 100%;
    margin-top: var(--spacing-md);
}

.login-code-input {
    font-size: var(--font-size-xl);
    text-align: center;
    letter-spacing: 8px;
    font-family: 'SF Mono', Monaco, 'Courier New', monospace;
}

/* ============================================================================
   Utility Classes
   ============================================================================ */

.text-muted { color: var(--color-text-muted); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-danger { color: var(--color-danger); }
.text-info { color: var(--color-info); }

.text-sm { font-size: var(--font-size-sm); }
.text-xs { font-size: var(--font-size-xs); }
.text-lg { font-size: var(--font-size-lg); }

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

.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-md { margin-top: var(--spacing-md); }
.mb-md { margin-bottom: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.hidden { display: none !important; }
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* ============================================================================
   Responsive Design
   ============================================================================ */

@media (max-width: 768px) {
    :root {
        --font-size-base: 14px;
    }

    .sidebar {
        transform: translateX(-100%);
    }

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

    .mobile-nav-toggle {
        display: block;
    }

    .mobile-nav-overlay.open {
        display: block;
    }

    .main-content {
        margin-left: 0;
    }

    .page-header {
        padding: var(--spacing-md);
        padding-left: 60px; /* Space for hamburger */
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }

    .page-content {
        padding: var(--spacing-md);
    }

    .page-actions {
        width: 100%;
    }

    .page-actions .btn {
        flex: 1;
    }

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

    .form-actions {
        flex-direction: column;
    }

    .form-actions .btn {
        width: 100%;
    }

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

    .detail-list {
        grid-template-columns: 1fr;
    }

    .filters {
        flex-direction: column;
    }

    .search-bar {
        flex-direction: column;
    }

    .search-input {
        max-width: none;
    }

    /* Card table layout for mobile */
    .table-responsive-cards thead {
        display: none;
    }

    .table-responsive-cards tbody tr {
        display: block;
        margin-bottom: var(--spacing-md);
        padding: var(--spacing-md);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-md);
    }

    .table-responsive-cards tbody td {
        display: flex;
        justify-content: space-between;
        padding: var(--spacing-xs) 0;
        border: none;
    }

    .table-responsive-cards tbody td::before {
        content: attr(data-label);
        font-weight: var(--font-weight-medium);
        color: var(--color-text-muted);
    }

    .table-responsive-cards tbody td.actions {
        justify-content: flex-end;
        padding-top: var(--spacing-sm);
        margin-top: var(--spacing-sm);
        border-top: 1px solid var(--color-border);
    }
}

/* ============================================================================
   Payment Form & Inline Invoice Allocation
   ============================================================================ */

/* Constrains the payment form card to a narrow width by default */
.card-payment-form {
    max-width: 600px;
    transition: max-width var(--transition-base);
}

/* Widens the card when invoices are displayed alongside the form */
.card-wide {
    max-width: 900px;
}

/* Separator section between notes field and invoice list */
.invoice-allocation-section {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

/* Header area for the allocation section */
.invoice-allocation-header {
    margin-bottom: var(--spacing-md);
}

.invoice-allocation-header h3 {
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
}

.invoice-allocation-header p {
    margin: 0;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* Fixed-width column for the checkbox in the invoice table */
.invoice-check-col {
    width: 40px;
    text-align: center;
}

/* Green text for fully-covered allocation amounts */
.allocation-full {
    color: var(--color-success);
    font-weight: var(--font-weight-medium);
}

/* Amber text for partially-covered allocation amounts */
.allocation-partial {
    color: var(--color-warning);
    font-weight: var(--font-weight-medium);
}

/* Summary box showing payment/allocated/unallocated totals */
.allocation-summary {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--color-surface-alt);
    border-radius: var(--radius-md);
}

/* Each label + value row inside the summary box */
.allocation-summary-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xs) 0;
    font-size: var(--font-size-sm);
}

.allocation-summary-row:not(:last-child) {
    border-bottom: 1px solid var(--color-border);
}

.allocation-summary-row strong {
    font-variant-numeric: tabular-nums;
}

/* Client account snapshot shown on the payment form when a client is selected */
.account-summary-section {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background-color: var(--color-surface-alt);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.account-summary-section h3 {
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    color: var(--color-text-muted);
}

/* Three-column grid for the account summary values */
.account-summary-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.account-summary-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.account-summary-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.account-summary-value {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    font-variant-numeric: tabular-nums;
}

/* ============================================================================
   Flatpickr Overrides
   ============================================================================ */

/* Match flatpickr to the app's typography and colour palette */
.flatpickr-calendar {
    font-family: var(--font-family);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
}

.flatpickr-day.selected,
.flatpickr-day.startRange,
.flatpickr-day.endRange,
.flatpickr-day.selected.inRange,
.flatpickr-day.startRange.inRange,
.flatpickr-day.endRange.inRange,
.flatpickr-day.selected:focus,
.flatpickr-day.startRange:focus,
.flatpickr-day.endRange:focus,
.flatpickr-day.selected:hover,
.flatpickr-day.startRange:hover,
.flatpickr-day.endRange:hover,
.flatpickr-day.selected.prevMonthDay,
.flatpickr-day.startRange.prevMonthDay,
.flatpickr-day.endRange.prevMonthDay,
.flatpickr-day.selected.nextMonthDay,
.flatpickr-day.startRange.nextMonthDay,
.flatpickr-day.endRange.nextMonthDay {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.flatpickr-day.today:not(.selected) {
    border-color: var(--color-secondary);
}

.flatpickr-day:hover {
    background: var(--color-surface-alt);
}

.flatpickr-months .flatpickr-month {
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

/* ============================================================================
   Print Styles
   ============================================================================ */

@media print {
    .sidebar,
    .mobile-nav-toggle,
    .page-actions,
    .form-actions,
    .btn,
    .pagination,
    .filters,
    .search-bar {
        display: none !important;
    }

    .main-content {
        margin-left: 0;
    }

    .page-content {
        padding: 0;
        max-width: none;
    }

    .card {
        border: none;
        box-shadow: none;
    }

    body {
        background-color: #FFFFFF;
        font-size: 12pt;
    }

    a {
        color: #000000;
        text-decoration: none;
    }

    .table th,
    .table td {
        padding: 8px;
    }
}