* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  color-scheme: light dark;
  --primary-color: #1e40af;
  --secondary-color: #475569;
  --success-color: #047857;
  --danger-color: #dc2626;
  --warning-color: #b45309;
  --text-color: #0f172a;
  --text-muted: #334155;
  --link-color: #1e40af;
  --link-color-hover: var(--primary-color-hover);
  --bg-color: #ffffff;
  --border-color: #e2e8f0;
  --focus-ring: #1e40af;

  --primary-color-hover: #1e3a8a;
  --primary-color-active: #0f172a;

  --secondary-color-hover: #334155;
  --secondary-color-active: #1e293b;

  --success-color-hover: #166534;
  --success-color-active: #14532d;

  --danger-color-hover: #7f1d1d;
  --danger-color-active: #450a0a;

  --warning-color-hover: #854d0e;
  --warning-color-active: #713f12;

  --alert-error-bg: #fee2e2;
  --alert-error-text: #7f1d1d;
  --alert-error-border: #fecaca;

  --alert-success-bg: #d1fae5;
  --alert-success-text: #064e3b;
  --alert-success-border: #a7f3d0;

  --alert-warning-bg: #fef3c7;
  --alert-warning-text: #78350f;
  --alert-warning-border: #fde68a;

  --alert-info-bg: #e0f2fe;
  --alert-info-text: #0c4a6e;
  --alert-info-border: #a7e1ff;

  --gradient-hero-start: #667eea;
  --gradient-hero-end: #764ba2;

  --text-on-accent: #ffffff;
  --background-component: #ffffff;

  --background-code: #f1f5f9;
  --background-alt: #f8fafc;
  --hero-lead-text-color: rgba(255, 255, 255, 0.95);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text-color);
  line-height: 1.5;
  background: var(--bg-color);
}

code {
  background: var(--background-code);
  border: 1px solid var(--border-color);
  padding: 0.2rem 0.4rem;
  border-radius: 0.25rem;
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.9em;
}

pre code {
  background: none;
  border: none;
  padding: 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Header & Navigation */
.navbar {
  background: var(--background-component);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--primary-color);
  text-decoration: none;
}

/* Links */
a {
  display: inline-block;
  min-height: 24px;
  color: var(--link-color);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  text-decoration-thickness: 2px;
  color: var(--link-color-hover);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
  color: var(--link-color);
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--link-color-hover);
  text-decoration-thickness: 2px;
}

.nav-links a:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
  border-radius: 0.25rem;
}

/* Buttons */
a.btn,
button.btn,
.btn {
  display: inline-block;
  padding: 0.5rem 1.5rem;
  border-radius: 0.375rem;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.2s;
  border: 2px solid transparent;
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  min-height: 44px;
  min-width: 44px;
}

a.btn:hover,
button.btn:hover,
.btn:hover {
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
  transform: translateY(-1px);
}

a.btn-primary,
button.btn-primary,
.btn-primary {
  background: var(--primary-color);
  color: var(--text-on-accent);
  border-color: var(--primary-color);
}

a.btn-primary:hover,
button.btn-primary:hover,
.btn-primary:hover {
  background: var(--primary-color-hover);
  border-color: var(--primary-color-hover);
  color: var(--text-on-accent);
}

.btn-primary:active {
  background: var(--primary-color-active);
  border-color: var(--primary-color-active);
  transform: translateY(0);
}

.btn-primary:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
}

a.btn-secondary,
button.btn-secondary,
.btn-secondary {
  background: var(--secondary-color);
  color: var(--text-on-accent);
  border-color: var(--secondary-color);
}

a.btn-secondary:hover,
button.btn-secondary:hover,
.btn-secondary:hover {
  background: var(--secondary-color-hover);
  border-color: var(--secondary-color-hover);
  color: var(--text-on-accent);
}

.btn-secondary:active {
  background: var(--secondary-color-active);
  border-color: var(--secondary-color-active);
  transform: translateY(0);
}

.btn-secondary:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
}

.btn-lg {
  padding: 0.75rem 2rem;
  font-size: 1.125rem;
}

/* Hero Section */
.hero {
  padding: 4rem 0;
  text-align: center;
  background: linear-gradient(135deg, var(--gradient-hero-start) 0%, var(--gradient-hero-end) 100%);
  color: var(--text-on-accent);
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.hero .lead {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  color: var(--hero-lead-text-color);
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

/* Features Section */
.features {
  padding: 4rem 0;
}

.features h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 3rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.feature {
  padding: 2rem;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
}

.feature h3 {
  color: var(--primary-color);
  margin-bottom: 1rem;
}

/* Footer */
body > footer {
  background: var(--primary-color-active);
  color: var(--text-on-accent);
  padding: 2rem 0;
  margin-top: 4rem;
  text-align: center;
}

/* Error Pages */
.error-page {
  padding: 4rem 0;
  text-align: center;
}

.error-page h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
}

/* Auth Pages */
.auth-container {
  min-height: calc(100vh - 200px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
  background: linear-gradient(135deg, var(--gradient-hero-start) 0%, var(--gradient-hero-end) 100%);
}

.auth-box {
  background: var(--background-component);
  padding: 2.5rem;
  border-radius: 0.75rem;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  max-width: 450px;
  width: 100%;
}

.auth-box h1 {
  font-size: 1.875rem;
  margin-bottom: 0.5rem;
  color: var(--text-color);
}

.auth-box .subtitle {
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.auth-form fieldset,
.settings-form fieldset {
  border: none;
  padding: 0;
  margin-bottom: 1.5rem;
}

.auth-form label,
.settings-form label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-color);
}

.auth-form input,
.settings-form input,
.settings-form select {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  font-size: 1rem;
  transition: border-color 0.2s;
  background-color: var(--bg-color);
  color: var(--text-color);
}

.auth-form input:focus-visible,
.settings-form input:focus-visible,
.settings-form select:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
  border-color: var(--primary-color);
}

.auth-form small,
.settings-form small {
  display: block;
  margin-top: 0.25rem;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.btn-block {
  width: 100%;
  padding: 0.875rem;
  font-size: 1rem;
}

.auth-footer {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.auth-footer p {
  color: var(--text-muted);
}

.auth-footer a {
  color: var(--link-color);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  font-weight: 500;
}

.auth-footer a:hover {
  text-decoration-thickness: 2px;
  color: var(--link-color-hover);
}

/* Alert Messages */
.alert {
  padding: 1rem;
  border-radius: 0.375rem;
  margin-bottom: 1.5rem;
}

.alert-error {
  background: var(--alert-error-bg);
  color: var(--alert-error-text);
  border-color: var(--alert-error-border);
}

.alert-success {
  background: var(--alert-success-bg);
  color: var(--alert-success-text);
  border-color: var(--alert-success-border);
}

.alert-warning {
  background: var(--alert-warning-bg);
  color: var(--alert-warning-text);
  border-color: var(--alert-warning-border);
}

.alert-info {
  background: var(--alert-info-bg);
  color: var(--alert-info-text);
  border-color: var(--alert-info-border);
}

.page-container {
  padding: 2rem 0;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
  flex-direction: column;
}

nav {
  align-content: center;
  text-align: center;
}

.page-header h1 {
  font-size: 2rem;
  color: var(--text-color);
}

.page-header .subtitle {
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.page-header nav form {
  margin: 0;
}

/* Content Layouts */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.content-stacked {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* Card Component */
.card {
  background: var(--background-component);
  padding: 1.5rem;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.card h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-color);
}

.card p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.card p.badge {
  color: var(--text-on-accent);
}

.card-footer {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Profile Info */

.profile-info {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 1rem;
  margin: 1.5rem 0;
}

.profile-info dt,
.instance-info dt {
  font-weight: 600;
  color: var(--text-color);
}

.profile-info dd,
.instance-info dd {
  color: var(--text-muted);
  margin: 0;
}

.profile-info em,
.instance-info em {
  color: var(--text-muted);
  font-style: italic;
}

/* Forms */
.settings-form {
  margin-top: 1.5rem;
}

.settings-form input[type="checkbox"] {
  width: auto;
  padding: 0;
  margin-right: 0.5rem;
}

.settings-form label:has(input[type="checkbox"]) {
  display: flex;
  align-items: flex-start;
  font-weight: normal;
  cursor: pointer;
}

/* Data Tables */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
  background: var(--background-component);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  overflow: hidden;
}

.data-table thead {
  background: var(--background-alt);
  border-bottom: 2px solid var(--border-color);
}

.data-table th {
  padding: 0.75rem 1rem;
  text-align: left;
  font-weight: 600;
  color: var(--text-color);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.data-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-muted);
  vertical-align: middle;
}

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

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

.data-table code {
  white-space: nowrap;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 0.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  border: 1px solid transparent;
}

.badge-primary {
  background: var(--primary-color);
  color: var(--text-on-accent);
  border-color: var(--primary-color);
}

.badge-secondary {
  background: var(--secondary-color);
  color: var(--text-on-accent);
  border-color: var(--secondary-color);
}

/* Small buttons */
.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.875rem;
}

/* Danger button */
a.btn-danger,
button.btn-danger,
.btn-danger {
  background: var(--danger-color);
  color: var(--text-on-accent);
  border-color: var(--danger-color);
}

a.btn-danger:hover,
button.btn-danger:hover,
.btn-danger:hover {
  background: var(--danger-color-hover);
  border-color: var(--danger-color-hover);
}

.btn-danger:active {
  background: var(--danger-color-hover);
  border-color: var(--danger-color-hover);
  transform: translateY(0);
}

.btn-danger:focus-visible {
  outline: 3px solid var(--danger-color-hover);
  outline-offset: 2px;
}

/* Success button */
a.btn-success,
button.btn-success,
.btn-success {
  background: var(--success-color);
  color: var(--text-on-accent);
  border-color: var(--success-color);
}

a.btn-success:hover,
button.btn-success:hover,
.btn-success:hover {
  background: var(--success-color-hover);
  border-color: var(--success-color-hover);
  color: var(--text-on-accent);
}

.btn-success:active {
  background: var(--success-color-active);
  border-color: var(--success-color-active);
  transform: translateY(0);
}

.btn-success:focus-visible {
  outline: 3px solid var(--success-color);
  outline-offset: 2px;
}

/* Warning button */
a.btn-warning,
button.btn-warning,
.btn-warning {
  background: var(--warning-color);
  color: var(--text-on-accent);
  border-color: var(--warning-color);
}

a.btn-warning:hover,
button.btn-warning:hover,
.btn-warning:hover {
  background: var(--warning-color-hover);
  border-color: var(--warning-color-hover);
  color: var(--text-on-accent);
}

.btn-warning:active {
  background: var(--warning-color-active);
  border-color: var(--warning-color-active);
  transform: translateY(0);
}

.btn-warning:focus-visible {
  outline: 3px solid var(--warning-color);
  outline-offset: 2px;
}

.badge-success {
  background: var(--success-color);
  color: var(--text-on-accent);
  border-color: var(--success-color);
}

.badge-warning {
  background: var(--warning-color);
  color: var(--text-on-accent);
  border-color: var(--warning-color);
}

/* Instance info list */
.instance-info {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 0.75rem;
  margin: 1rem 0;
}

.badge-danger {
  background: var(--danger-color);
  color: var(--text-on-accent);
  border-color: var(--danger-color);
}

/* Generic reusable utility classes */
.text-large {
  font-size: 2.5rem;
  font-weight: bold;
  color: var(--primary-color);
}

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

.text-small {
  font-size: 1rem;
  font-weight: normal;
}

.text-sm {
  font-size: 0.875rem;
}

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

.d-block {
  display: block;
}

.list-clean {
  list-style: none;
  padding: 0;
}

.list-divided li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border-color);
}

.list-divided li:last-child {
  border-bottom: none;
}

.list-horizontal {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.border-highlight {
  border-color: var(--primary-color);
  box-shadow: 0 10px 25px rgba(37, 99, 235, 0.15);
}

.divider-bottom {
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.divider-bottom:last-child {
  border-bottom: none;
}

.spacing-large {
  margin: 4rem auto;
}

.spacing-medium {
  margin: 2rem 0;
}

.spacing-small {
  margin: 1rem 0;
}

.spacing-tiny {
  margin: 1.5rem 0;
}

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

.btn-group {
  display: flex;
  gap: 0.5rem;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
  margin-top: 1.5rem;
}

.pagination {
  display: flex;
  justify-content: center;
  list-style: none;
  padding: 0;
  margin: 2rem 0;
}

.pagination li {
  margin: 0 0.25rem;
}

.pagination a,
.pagination span {
  display: block;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 0.25rem;
  text-decoration: none;
  color: var(--link-color);
}

.pagination a:hover {
  background: var(--background-alt);
  border-color: var(--primary-color);
}

.pagination .current span {
  background: var(--primary-color);
  color: var(--text-on-accent);
  border-color: var(--primary-color);
  font-weight: 600;
}

.pagination .disabled span {
  color: var(--text-muted);
  cursor: not-allowed;
  background: var(--background-alt);
}

.grid {
  display: grid;
  gap: 1.5rem;
}

/* Table of Contents / Sticky Navigation */
.layout-with-toc {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.toc-sidebar summary {
  cursor: pointer;
  font-weight: 600;
  padding: 0.75rem;
  user-select: none;
}

.toc-list {
  list-style: none;
  padding: 0.5rem 0;
  margin: 0;
}

.toc-list li {
  margin: 0;
}

.toc-list a {
  display: block;
  padding: 0.5rem 1rem;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  color: var(--link-color);
  transition: all 0.2s;
  border-left: 3px solid transparent;
}

.toc-list a:hover {
  background: var(--background-alt);
  border-left-color: var(--link-color-hover);
  color: var(--link-color-hover);
  text-decoration-thickness: 2px;
}

.toc-list a:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
}

.main-content {
  min-width: 0;
}

@media (min-width: 1024px) {
  .layout-with-toc {
    grid-template-columns: 250px 1fr;
  }

  .toc-sidebar {
    order: -1;
    position: sticky;
    top: 2rem;
    max-height: calc(100vh - 4rem);
    overflow-y: auto;
  }
}

/* Documentation Spacing */
.content-stacked section h3 {
  margin-top: 2rem;
  margin-bottom: 1rem;
  font-size: 1.25rem;
  color: var(--text-color);
}

.content-stacked section h4 {
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  font-size: 1.125rem;
  color: var(--text-color);
}

.content-stacked section pre {
  background: var(--background-alt);
  padding: 1rem;
  border-radius: 0.375rem;
  overflow-x: auto;
  border: 1px solid var(--border-color);
  margin: 1rem 0;
}

.content-stacked section ol,
.content-stacked section ul {
  margin: 1rem 0;
  padding-left: 1.5rem;
}

.content-stacked section li {
  margin: 0.5rem 0;
}

.content-stacked section dl {
  margin: 1rem 0;
}

.content-stacked section dt {
  font-weight: 600;
  margin-top: 1rem;
  color: var(--text-color);
}

.content-stacked section dd {
  margin-left: 1.5rem;
  margin-bottom: 0.5rem;
}

.content-stacked section dd ul {
  margin-top: 0.5rem;
}

.skip-to-main {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--primary-color);
  color: var(--text-on-accent);
  padding: 0.75rem 1.5rem;
  text-decoration: none;
  z-index: 9999;
}

.skip-to-main:focus-visible {
  top: 0;
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
}

a:focus:not(:focus-visible),
button:focus:not(:focus-visible) {
  outline: none;
}

.mb-2 {
  margin-bottom: 2em;
}

.mt-1 {
  margin-top: 0.5rem;
}

.mt-2 {
  margin-top: 1rem;
}

.mt-4 {
  margin-top: 1.5rem;
}

.mt-6 {
  margin-top: 2rem;
}

.ml-1 {
  margin-left: 0.5rem;
}

.p-4 {
  padding: 1rem;
}

.bg-alt {
  background: var(--background-alt);
}

.rounded {
  border-radius: 0.5rem;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (prefers-contrast: high) {
  :root {
    --primary-color: #0000ee;
    --danger-color: #cc0000;
    --success-color: #006600;
    --border-color: #000000;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary-color: #2563eb;
    --primary-color-hover: #1e40af;
    --primary-color-active: #1e3a8a;

    --secondary-color: #64748b;
    --secondary-color-hover: #475569;
    --secondary-color-active: #334155;

    --success-color: #059669;
    --success-color-hover: #064e3b;
    --success-color-active: #064e3b;

    --danger-color: #b91c1c;
    --danger-color-hover: #dc2626;
    --danger-color-active: #7f1d1d;

    --warning-color: #d97706;
    --warning-color-hover: #b45309;
    --warning-color-active: #b45309;

    --text-color: #f1f5f9;
    --text-muted: #cbd5e1;
    --link-color: #93c5fd;
    --link-color-hover: #a7e1ff;
    --bg-color: #020617;
    --border-color: #475569;
    --focus-ring: #93c5fd;

    --gradient-hero-start: #1e3a8a;
    --gradient-hero-end: #581c87;

    --text-on-accent: #ffffff;
    --background-component: var(--secondary-color-active);

    --alert-error-bg: #7f1d1d;
    --alert-error-text: #fecaca;
    --alert-error-border: #991b1b;

    --alert-success-bg: #064e3b;
    --alert-success-text: #a7f3d0;
    --alert-success-border: #065f46;

    --alert-warning-bg: #78350f;
    --alert-warning-text: #fef3c7;
    --alert-warning-border: #92400e;

    --alert-info-bg: #0c4a6e;
    --alert-info-text: #bfdbfe;
    --alert-info-border: #3b82f6;

    --background-code: #1e293b;
    --background-alt: #0f172a;
    --hero-lead-text-color: rgba(255, 255, 255, 0.95);
  }
}