/* ============================================================
   Treasurio Design System — Tokens & Base Styles
   ============================================================
   This file defines:
   1. CSS Reset / Normalize
   2. Design Tokens (Custom Properties)
   3. Base Element Styles (html, body, headings, links, etc.)
   
   Component styles are added separately (sidebar, tables, forms, etc.)
   ============================================================ */

/* ------------------------------------------------------------
   1. CSS Reset / Normalize
   ------------------------------------------------------------ */
*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

p,
h1,
h2,
h3,
h4,
h5,
h6 {
  overflow-wrap: break-word;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}

ul,
ol {
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Remove default button styles */
button {
  background: none;
  border: none;
  cursor: pointer;
}

/* Ensure hidden attribute works */
[hidden] {
  display: none !important;
}

/* ------------------------------------------------------------
   2. Design Tokens (Custom Properties)
   ------------------------------------------------------------ */
:root {
  /* --- Colors: Primary (Professional Blue) --- */
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  --primary-200: #bfdbfe;
  --primary-300: #93c5fd;
  --primary-400: #60a5fa;
  --primary-500: #3b82f6;
  --primary-600: #2563eb;
  --primary-700: #1d4ed8;
  --primary-800: #1e40af;
  --primary-900: #1e3a8a;

  /* --- Colors: Neutral (Gray) --- */
  --neutral-50: #f8fafc;
  --neutral-100: #f1f5f9;
  --neutral-200: #e2e8f0;
  --neutral-300: #cbd5e1;
  --neutral-400: #94a3b8;
  --neutral-500: #64748b;
  --neutral-600: #475569;
  --neutral-700: #334155;
  --neutral-800: #1e293b;
  --neutral-900: #0f172a;

  /* --- Colors: Success (Green) --- */
  --success-light: #dcfce7;
  --success-base: #16a34a;
  --success-dark: #15803d;

  /* --- Colors: Warning (Amber) --- */
  --warning-light: #fef3c7;
  --warning-base: #d97706;
  --warning-dark: #b45309;

  /* --- Colors: Danger (Red) --- */
  --danger-light: #fee2e2;
  --danger-base: #dc2626;
  --danger-dark: #b91c1c;

  /* --- Spacing Scale (4px base) --- */
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-7: 1.75rem;   /* 28px */
  --space-8: 2rem;      /* 32px */

  /* --- Border Radius --- */
  --radius-sm: 0.25rem;  /* 4px */
  --radius-md: 0.5rem;   /* 8px */
  --radius-lg: 0.75rem;  /* 12px */

  /* --- Typography --- */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  --font-family-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  /* Font sizes */
  --font-size-h1: 1.875rem;   /* 30px */
  --font-size-h2: 1.5rem;     /* 24px */
  --font-size-h3: 1.25rem;    /* 20px */
  --font-size-h4: 1rem;       /* 16px */
  --font-size-body: 1rem;     /* 16px */
  --font-size-caption: 0.75rem;    /* 12px */
  --font-size-label: 0.8125rem;    /* 13px */

  /* Line heights */
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;

  /* Font weights */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* --- Transitions --- */
  --transition-hover: 150ms ease;
  --transition-focus: 100ms ease;
  --transition-panel: 250ms ease;

  /* --- Focus Ring --- */
  --focus-ring-width: 2px;
  --focus-ring-offset: 3px;
  --focus-ring-color: var(--primary-500);

  /* --- Shadows --- */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);

  /* --- Semantic aliases (convenience) --- */
  --color-bg: var(--neutral-50);
  --color-surface: #ffffff;
  --color-text: var(--neutral-900);
  --color-text-muted: var(--neutral-500);
  --color-border: var(--neutral-200);
  --color-border-strong: var(--neutral-300);
  --color-link: var(--primary-600);
  --color-link-hover: var(--primary-700);
}

/* ------------------------------------------------------------
   3. Base Element Styles
   ------------------------------------------------------------ */

html {
  font-size: 100%; /* 16px base — allows user font-size preferences */
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
}

/* --- Headings --- */
h1,
h2,
h3,
h4 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
}

h1 {
  font-size: var(--font-size-h1);
  margin-bottom: var(--space-4);
}

h2 {
  font-size: var(--font-size-h2);
  margin-bottom: var(--space-3);
}

h3 {
  font-size: var(--font-size-h3);
  margin-bottom: var(--space-2);
}

h4 {
  font-size: var(--font-size-h4);
  margin-bottom: var(--space-2);
}

/* --- Paragraphs --- */
p {
  color: var(--color-text-muted);
  line-height: var(--line-height-normal);
  margin-bottom: var(--space-4);
}

p:last-child {
  margin-bottom: 0;
}

/* --- Links --- */
a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition-hover);
}

a:hover {
  color: var(--color-link-hover);
}

/* --- Focus Styles (WCAG 2.1 AA) --- */
:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
  transition: outline-offset var(--transition-focus);
}

/* Remove focus ring for mouse users */
:focus:not(:focus-visible) {
  outline: none;
}

/* --- Labels --- */
label {
  display: block;
  font-size: var(--font-size-label);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

/* --- Form Inputs --- */
input,
select,
textarea {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-body);
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-hover), box-shadow var(--transition-focus);
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--primary-500);
  box-shadow: 0 0 0 var(--focus-ring-width) rgba(59, 130, 246, 0.25);
  outline: none;
}

input::placeholder,
textarea::placeholder {
  color: var(--neutral-400);
}

textarea {
  min-height: 5rem;
  resize: vertical;
}

/* --- Buttons (base reset — variants in component styles) --- */
button,
[role="button"] {
  font-family: var(--font-family);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  transition: background-color var(--transition-hover), color var(--transition-hover), box-shadow var(--transition-focus);
}

/* --- Tables (base) --- */
table {
  width: 100%;
  font-size: var(--font-size-label);
}

th,
td {
  padding: var(--space-3) var(--space-2);
  text-align: left;
  vertical-align: middle;
  border-bottom: 1px solid var(--color-border);
}

th {
  font-size: var(--font-size-caption);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.025em;
  background-color: var(--neutral-50);
}

/* --- Small / Caption text --- */
small,
.caption {
  font-size: var(--font-size-caption);
  color: var(--color-text-muted);
}

/* --- Code --- */
code,
pre {
  font-family: var(--font-family-mono);
  font-size: 0.875rem;
}

code {
  padding: 0.125rem 0.375rem;
  background-color: var(--neutral-100);
  border-radius: var(--radius-sm);
}

pre {
  padding: var(--space-4);
  background-color: var(--neutral-100);
  border-radius: var(--radius-md);
  overflow-x: auto;
}

/* --- Horizontal Rule --- */
hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-6) 0;
}

/* --- Selection --- */
::selection {
  background-color: var(--primary-100);
  color: var(--primary-900);
}

/* --- Reduced Motion --- */
@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;
  }
}

/* ============================================================
   4. Component Styles
   ============================================================ */

/* ------------------------------------------------------------
   4.1 Skip Navigation
   ------------------------------------------------------------ */
.skip-nav {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 9999;
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-semibold);
  color: var(--color-surface);
  background-color: var(--primary-700);
  border-radius: var(--radius-md);
  transition: top var(--transition-panel);
}

.skip-nav:focus-visible {
  top: var(--space-4);
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
}

/* ------------------------------------------------------------
   4.2 Sidebar
   ------------------------------------------------------------ */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;
  width: 240px;
  height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--neutral-800);
  color: var(--neutral-100);
  overflow-y: auto;
  transition: transform var(--transition-panel);
}

.sidebar__brand {
  padding: var(--space-4) var(--space-5);
  border-bottom: 3px solid var(--primary-600);
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-bold);
  color: var(--color-surface);
}

.sidebar__nav {
  flex: 1;
  padding: var(--space-4) 0;
}

.sidebar__group-title {
  padding: var(--space-2) var(--space-5);
  font-size: var(--font-size-caption);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--neutral-400);
  margin-top: var(--space-4);
}

.sidebar__group-title:first-child {
  margin-top: 0;
}

.sidebar__link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  font-size: var(--font-size-label);
  color: var(--neutral-200);
  border-left: 3px solid transparent;
  transition: background-color var(--transition-hover),
              border-color var(--transition-hover),
              color var(--transition-hover);
}

.sidebar__link:hover {
  background-color: var(--neutral-700);
  color: var(--color-surface);
}

.sidebar__link:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: calc(-1 * var(--focus-ring-width));
}

.sidebar__link.active {
  border-left-color: var(--primary-400);
  background-color: var(--neutral-700);
  color: var(--color-surface);
  font-weight: var(--font-weight-semibold);
}

.sidebar__user {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--neutral-700);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.sidebar__user-name {
  flex: 1;
  font-size: var(--font-size-label);
  color: var(--neutral-200);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 120px;
}

.sidebar__signout-form {
  margin: 0;
}

.sidebar__signout {
  padding: 0;
  color: var(--neutral-200);
  font: inherit;
  font-size: var(--font-size-caption);
  background: transparent;
  border: 0;
  cursor: pointer;
}

.sidebar__signout:hover {
  color: var(--color-surface);
  text-decoration: underline;
}

.sidebar__signout:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
}

.sidebar__backdrop {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 99;
  background-color: rgba(0, 0, 0, 0.4);
}

.sidebar__backdrop.active {
  display: block;
}

/* Main content offset for sidebar */
.main-content {
  margin-left: 240px;
  padding: var(--space-6);
  min-height: 100vh;
}

/* ------------------------------------------------------------
   4.2a Authentication shell
   ------------------------------------------------------------ */
body.auth-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(circle at top left, var(--primary-100), transparent 38%),
    var(--neutral-50);
}

.auth-main {
  flex: 1;
  min-height: calc(100vh - 52px);
  margin-left: 0;
  padding: clamp(var(--space-4), 5vw, 3rem);
  display: flex;
  align-items: center;
  justify-content: center;
}

.auth {
  width: min(100%, 460px);
  padding: clamp(var(--space-5), 5vw, var(--space-8));
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.auth__header {
  margin-bottom: var(--space-6);
}

.auth__brand {
  display: inline-flex;
  margin-bottom: var(--space-4);
  font-size: var(--font-size-label);
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary-700);
}

.auth h1 {
  margin-bottom: var(--space-2);
}

.auth__header p {
  margin-bottom: 0;
}

.auth .fieldset {
  margin-bottom: var(--space-5);
  padding-bottom: 0;
  border-bottom: 0;
}

.auth legend {
  width: 100%;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--font-size-h4);
  font-weight: var(--font-weight-semibold);
}

.auth .required-legend {
  float: right;
  font-size: var(--font-size-caption);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
}

.auth .btn {
  width: 100%;
}

.auth-page .app-footer {
  padding: var(--space-4);
  text-align: center;
}

/* ------------------------------------------------------------
   4.3 Data Table
   ------------------------------------------------------------ */
.page-title {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-5);
  margin-bottom: var(--space-6);
}

.page-title > div:first-child {
  min-width: 0;
}

.page-title p {
  max-width: 70ch;
  margin-bottom: 0;
}

.eyebrow {
  display: block;
  margin-bottom: var(--space-1);
  color: var(--primary-700);
  font-size: var(--font-size-caption);
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hero-actions,
.actions,
.section-head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.hero-actions {
  flex: 0 0 auto;
}

.section-head {
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.grid {
  display: grid;
  gap: var(--space-5);
  min-width: 0;
}

.grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.panel {
  min-width: 0;
  margin-bottom: var(--space-5);
  padding: clamp(var(--space-4), 3vw, var(--space-6));
  overflow: hidden;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.panel.narrow {
  width: min(100%, 760px);
  margin-inline: auto;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.table-wrap {
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  -webkit-overflow-scrolling: touch;
}

.card {
  margin-bottom: var(--space-3);
  padding: var(--space-4);
  background-color: var(--neutral-50);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.required-legend {
  color: var(--color-text-muted);
  font-size: var(--font-size-caption);
  font-weight: var(--font-weight-medium);
}

.data-table-wrapper {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
}

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

.data-table th,
.data-table td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  vertical-align: middle;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

.data-table th {
  position: sticky;
  top: 0;
  z-index: 2;
  background-color: var(--neutral-50);
  font-size: var(--font-size-caption);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.025em;
  cursor: pointer;
  user-select: none;
}

.data-table th:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: calc(-1 * var(--focus-ring-width));
}

/* Sort indicators */
.data-table th[data-sort]::after {
  content: "";
  display: inline-block;
  margin-left: var(--space-1);
  width: 0;
  height: 0;
  vertical-align: middle;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-bottom: 4px solid var(--neutral-400);
  opacity: 0.4;
}

.data-table th[data-sort="asc"]::after {
  border-bottom: 4px solid var(--primary-600);
  opacity: 1;
}

.data-table th[data-sort="desc"]::after {
  border-top: 4px solid var(--primary-600);
  border-bottom: none;
  opacity: 1;
}

/* Sticky first column */
.data-table th:first-child,
.data-table td:first-child {
  position: sticky;
  left: 0;
  z-index: 1;
  background-color: inherit;
}

.data-table th:first-child {
  z-index: 3;
}

/* Alternate row striping */
.data-table tbody tr:nth-child(even) {
  background-color: var(--neutral-50);
}

.data-table tbody tr:hover {
  background-color: var(--primary-50);
}

/* Table search and controls */
.data-table-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.data-table-search {
  max-width: 280px;
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-label);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
}

.data-table-search:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
}

/* Pagination */
.data-table-pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--color-border);
  font-size: var(--font-size-caption);
  color: var(--color-text-muted);
}

/* Member profile key/value layout */
.detail-list {
  display: grid;
  grid-template-columns: minmax(9rem, 0.45fr) 1fr;
  gap: var(--space-3) var(--space-5);
  margin: 0;
}

.detail-list dt {
  color: var(--color-text-muted);
  font-size: var(--font-size-caption);
  font-weight: var(--font-weight-bold);
  text-transform: uppercase;
}

.detail-list dd {
  margin: 0;
  overflow-wrap: anywhere;
}

.data-table-pagination__pages {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.data-table-pagination__btn {
  min-width: 32px;
  min-height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-1) var(--space-2);
  font-size: var(--font-size-caption);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  transition: background-color var(--transition-hover);
}

.data-table-pagination__btn:hover {
  background-color: var(--neutral-100);
}

.data-table-pagination__btn:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
}

.data-table-pagination__btn.active {
  background-color: var(--primary-600);
  color: var(--color-surface);
  border-color: var(--primary-600);
}

.data-table-pagination__btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.data-table-page-size {
  padding: var(--space-1) var(--space-2);
  font-size: var(--font-size-caption);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface);
}

.data-table-empty {
  padding: var(--space-8);
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--font-size-body);
}

/* ------------------------------------------------------------
   4.4 Form Groups & Fieldsets
   ------------------------------------------------------------ */
.fieldset {
  border: none;
  padding: 0;
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--neutral-200);
}

.fieldset:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.fieldset__legend {
  font-size: var(--font-size-h4);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.form-group {
  margin-bottom: var(--space-4);
}

.form-group:last-child {
  margin-bottom: 0;
}

.form-group label {
  display: block;
  font-size: var(--font-size-label);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
}

.form-group__error {
  display: none;
  font-size: var(--font-size-caption);
  color: var(--danger-base);
  margin-top: var(--space-1);
}

.form-group.has-error input,
.form-group.has-error select,
.form-group.has-error textarea {
  border-color: var(--danger-base);
}

.form-group.has-error .form-group__error {
  display: block;
}

.form-group__hint {
  font-size: var(--font-size-caption);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

.form-required {
  color: var(--danger-base);
}

/* ------------------------------------------------------------
   4.5 Toast Notifications
   ------------------------------------------------------------ */
.toast-container {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  z-index: 9000;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-width: 360px;
  width: 100%;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--neutral-400);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  animation: toast-slide-in 250ms ease forwards;
}

.toast--success {
  border-left-color: var(--success-base);
}

.toast--danger {
  border-left-color: var(--danger-base);
}

.toast--warning {
  border-left-color: var(--warning-base);
}

.toast__message {
  flex: 1;
  font-size: var(--font-size-label);
  color: var(--color-text);
  line-height: var(--line-height-normal);
}

.toast__close {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: background-color var(--transition-hover),
              color var(--transition-hover);
}

.toast__close:hover {
  background-color: var(--neutral-100);
  color: var(--color-text);
}

.toast__close:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
}

@keyframes toast-slide-in {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes toast-slide-out {
  from {
    transform: translateX(0);
    opacity: 1;
  }
  to {
    transform: translateX(100%);
    opacity: 0;
  }
}

.toast.dismissing {
  animation: toast-slide-out 200ms ease forwards;
}

/* ------------------------------------------------------------
   4.6 Modal
   ------------------------------------------------------------ */
.modal-backdrop {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 8000;
  background-color: rgba(0, 0, 0, 0.5);
  align-items: center;
  justify-content: center;
}

.modal-backdrop.active {
  display: flex;
}

.modal {
  position: relative;
  width: 100%;
  max-width: 480px;
  margin: var(--space-4);
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  animation: modal-fade-in 200ms ease;
}

.modal:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
}

@keyframes modal-fade-in {
  from {
    transform: scale(0.95);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

.modal__header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.modal__title {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  margin-bottom: 0;
}

.modal__body {
  padding: var(--space-5) var(--space-6);
  font-size: var(--font-size-body);
  color: var(--color-text-muted);
  line-height: var(--line-height-normal);
}

.modal__footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
}

/* ------------------------------------------------------------
   4.7 Metric Card
   ------------------------------------------------------------ */
.metric-card {
  padding: var(--space-5);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.metric-card__label {
  font-size: var(--font-size-caption);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.025em;
  margin-bottom: var(--space-1);
}

.metric-card__value {
  font-size: var(--font-size-h2);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  line-height: var(--line-height-tight);
}

.metric-card__subtitle {
  font-size: var(--font-size-caption);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

/* Metric cards grid */
.metric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

/* ------------------------------------------------------------
   4.8 Badge
   ------------------------------------------------------------ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.125rem var(--space-2);
  font-size: var(--font-size-caption);
  font-weight: var(--font-weight-semibold);
  line-height: 1.4;
  border-radius: 9999px;
  white-space: nowrap;
  background-color: var(--neutral-100);
  color: var(--neutral-700);
}

.badge--success {
  background-color: var(--success-light);
  color: var(--success-dark);
}

.badge--warning {
  background-color: var(--warning-light);
  color: var(--warning-dark);
}

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

.badge--primary {
  background-color: var(--primary-100);
  color: var(--primary-800);
}

/* ------------------------------------------------------------
   4.9 Buttons
   ------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  min-height: 40px;
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-decoration: none;
  transition: background-color var(--transition-hover),
              color var(--transition-hover),
              border-color var(--transition-hover),
              box-shadow var(--transition-focus);
}

.btn:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Primary button */
.btn--primary {
  background-color: var(--primary-600);
  color: var(--color-surface);
  border-color: var(--primary-600);
}

.btn--primary:hover:not(:disabled) {
  background-color: var(--primary-700);
  border-color: var(--primary-700);
}

.btn--primary:active:not(:disabled) {
  background-color: var(--primary-800);
}

/* Danger button */
.btn--danger {
  background-color: var(--danger-base);
  color: var(--color-surface);
  border-color: var(--danger-base);
}

.btn--danger:hover:not(:disabled) {
  background-color: var(--danger-dark);
  border-color: var(--danger-dark);
}

.btn--danger:active:not(:disabled) {
  background-color: #991b1b;
}

/* Secondary button */
.btn--secondary {
  background-color: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border-strong);
}

.btn--secondary:hover:not(:disabled) {
  background-color: var(--neutral-50);
  border-color: var(--neutral-400);
}

.btn--secondary:active:not(:disabled) {
  background-color: var(--neutral-100);
}

/* Button sizes */
.btn--sm {
  padding: var(--space-2) var(--space-4);
  min-height: 32px;
  font-size: var(--font-size-label);
}

/* Button group */
.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* ------------------------------------------------------------
   4.10 Topbar (Mobile)
   ------------------------------------------------------------ */
.topbar-mobile {
  display: none;
  position: sticky;
  top: 0;
  z-index: 90;
  height: 56px;
  padding: 0 var(--space-4);
  background-color: var(--neutral-800);
  color: var(--color-surface);
  align-items: center;
  gap: var(--space-3);
}

.topbar-mobile__hamburger {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--neutral-100);
  cursor: pointer;
}

.topbar-mobile__hamburger:hover {
  background-color: var(--neutral-700);
}

.topbar-mobile__hamburger:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
}

.topbar-mobile__brand {
  font-size: var(--font-size-h4);
  font-weight: var(--font-weight-bold);
}

/* ------------------------------------------------------------
   4.11 Print Header (shown only when printing)
   ------------------------------------------------------------ */
.print-header {
  display: none;
}

/* ============================================================
   5. Print Styles
   ============================================================ */
@media print {
  /* Show print header */
  .print-header {
    display: block;
    padding: var(--space-4) 0;
    margin-bottom: var(--space-4);
    border-bottom: 2px solid #000;
  }

  .print-header__group {
    font-size: var(--font-size-h2);
    font-weight: var(--font-weight-bold);
  }

  .print-header__title {
    font-size: var(--font-size-h3);
  }

  .print-header__date {
    font-size: var(--font-size-caption);
    color: #555;
  }

  /* Hide non-essential UI */
  .sidebar,
  .sidebar__backdrop,
  .topbar-mobile,
  .toast-container,
  .skip-nav,
  .btn-group,
  .data-table-controls,
  .data-table-pagination,
  .modal-backdrop {
    display: none !important;
  }

  /* Reset main content layout for print */
  .main-content {
    margin-left: 0;
    padding: 0;
  }

  /* White background, black text */
  body {
    background-color: #fff;
    color: #000;
  }

  * {
    color: #000 !important;
    background-color: transparent !important;
    box-shadow: none !important;
  }

  /* Expand tables */
  .data-table-wrapper {
    overflow: visible;
    border: none;
  }

  .data-table {
    width: 100%;
    font-size: 10pt;
  }

  .data-table th,
  .data-table td {
    border: 1px solid #ccc;
    padding: 4px 8px;
    white-space: normal;
  }

  .data-table th:first-child,
  .data-table td:first-child {
    position: static;
  }

  /* Avoid page break inside table rows */
  .data-table tr {
    page-break-inside: avoid;
  }

  /* Links show URL */
  a[href]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: #555 !important;
  }

  a.sidebar__link::after,
  a.btn::after {
    content: none;
  }
}

/* ============================================================
   6. Responsive — Mobile (max-width: 768px)
   ============================================================ */
@media (max-width: 768px) {
  /* Show mobile topbar */
  .topbar-mobile {
    display: flex;
  }

  /* Sidebar becomes off-screen drawer */
  .sidebar {
    transform: translateX(-100%);
  }

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

  /* Remove sidebar offset for main content */
  .main-content {
    margin-left: 0;
    padding: var(--space-4);
  }

  .page-title {
    flex-direction: column;
    gap: var(--space-3);
  }

  .hero-actions,
  .hero-actions .btn {
    width: 100%;
  }

  .grid.two {
    grid-template-columns: minmax(0, 1fr);
  }

  .panel {
    padding: var(--space-4);
  }

  /* Single-column metric grid */
  .metric-grid {
    grid-template-columns: 1fr;
  }

  /* Increased touch targets for buttons (44px min) */
  .btn {
    min-height: 44px;
    padding: var(--space-3) var(--space-5);
  }

  .btn--sm {
    min-height: 44px;
  }

  /* Larger pagination buttons */
  .data-table-pagination__btn {
    min-width: 44px;
    min-height: 44px;
  }

  /* Toast — full width on mobile */
  .toast-container {
    left: var(--space-4);
    right: var(--space-4);
    max-width: none;
  }

  /* Modal — full width on mobile */
  .modal {
    max-width: calc(100vw - var(--space-8));
  }

  /* Table: allow horizontal scroll, remove sticky (too narrow) */
  .data-table th:first-child,
  .data-table td:first-child {
    position: static;
  }

  /* Form groups full width */
  .form-group input,
  .form-group select,
  .form-group textarea {
    font-size: 16px; /* prevent iOS zoom on focus */
  }

  .detail-list {
    grid-template-columns: 1fr;
    gap: var(--space-1);
  }

  .detail-list dd {
    margin-bottom: var(--space-3);
  }

  /* Data table controls stack vertically */
  .data-table-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .data-table-search {
    max-width: none;
  }

  /* Pagination wraps */
  .data-table-pagination {
    flex-direction: column;
    gap: var(--space-3);
  }

  /* Headings scale down */
  h1 {
    font-size: var(--font-size-h2);
  }

  h2 {
    font-size: var(--font-size-h3);
  }
}

/* ------------------------------------------------------------
   7. Dashboard-specific styles
   ------------------------------------------------------------ */

/* Metric card variants */
.metric-card--warning {
  border-left: 3px solid var(--warning-base);
}

.metric-card--success {
  border-left: 3px solid var(--success-base);
}

/* Quick-action buttons row */
.quick-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

/* Dashboard two-column responsive grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-5);
  margin-bottom: var(--space-6);
}

@media (max-width: 768px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
}

/* Work queue card list */
.work-queue {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.work-queue__item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--color-text);
  transition: background-color var(--transition-hover);
}

.work-queue__item:hover {
  background-color: var(--neutral-50);
}

.work-queue__count {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-bold);
  color: var(--primary-700);
  min-width: 3rem;
  text-align: center;
}

.work-queue__label {
  font-size: var(--font-size-body);
  color: var(--color-text-muted);
}

/* Empty state */
.empty-state {
  padding: var(--space-8) var(--space-4);
  text-align: center;
  color: var(--color-text-muted);
}

.empty-state p {
  margin-bottom: var(--space-4);
}

/* Error state */
.error-state {
  padding: var(--space-8) var(--space-4);
  text-align: center;
  color: var(--danger-dark);
  background-color: var(--danger-light);
  border-radius: var(--radius-md);
}

.error-state h2 {
  margin-bottom: var(--space-2);
}