/* ===== Design Tokens ===== */
:root {
  /* Color palette - modernized */
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-primary-light: #eff6ff;
  --color-primary-dark: #1e40af;
  --color-accent: #f97316;
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --color-header: #0f172a;
  --color-footer-bg: #0f172a;
  --color-footer-text: #94a3b8;
  --color-link: #2563eb;
  --color-menu-bg: #1e293b;
  --color-alert-bg: #fefce8;
  --color-alert-text: #854d0e;
  --color-alert-border: #fef08a;
  --color-example-bg: #f0fdf4;
  --color-example-text: #166534;
  --color-example-border: #bbf7d0;
  --color-search-result-bg: #f8fafc;
  --color-shadow: rgba(0, 0, 0, 0.06);
  --surface-tint: rgba(255, 255, 255, 0.7);
  --surface-backdrop: rgba(255, 255, 255, 0.55);
  --page-accent: var(--color-accent);

  /* Shadows - softer and more modern */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.12);

  /* Spacing scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 2.5rem;
  --space-3xl: 3rem;
  --space-4xl: 4rem;

  /* Typography */
  --font-family: 'DM Sans', 'Segoe UI', system-ui, sans-serif;
  --font-display: 'Instrument Serif', 'Georgia', serif;
  --font-size-xs: 0.875rem;
  --font-size-sm: clamp(0.9375rem, 0.85rem + 0.3vw, 1.0625rem);
  --font-size-base: clamp(1.0625rem, 0.95rem + 0.35vw, 1.1875rem);
  --font-size-lg: clamp(1.1875rem, 1.05rem + 0.4vw, 1.3125rem);
  --font-size-h2: clamp(1.4375rem, 1.25rem + 0.6vw, 1.75rem);
  --font-size-h1: clamp(1.75rem, 1.4rem + 1.2vw, 2.375rem);
  --font-size-hero: clamp(2rem, 1.5rem + 1.5vw, 2.75rem);
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --line-height-tight: 1.2;
  --line-height-base: 1.6;
  --line-height-relaxed: 1.75;

  /* Layout */
  --container-max-width: 1200px;
  --navbar-height: 64px;
  --border-radius-sm: 6px;
  --border-radius: 10px;
  --border-radius-lg: 16px;

  /* Focus */
  --focus-ring: 0 0 0 3px rgba(37, 99, 235, 0.35);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.25s cubic-bezier(0.2, 0.6, 0.2, 1);
  --transition-slow: 0.45s cubic-bezier(0.2, 0.6, 0.2, 1);
}

/* ===== Dark Theme ===== */
[data-theme='dark'] {
  --color-primary: #60a5fa;
  --color-primary-hover: #93c5fd;
  --color-primary-light: #1e3a5f;
  --color-primary-dark: #bfdbfe;
  --color-accent: #fb923c;
  --color-bg: #0c1222;
  --color-surface: #1a2436;
  --color-text: #e2e8f0;
  --color-text-muted: #a8b4c7;
  --color-border: #334155;
  --color-header: #080c14;
  --color-footer-bg: #080c14;
  --color-footer-text: #94a3b8;
  --color-link: #60a5fa;
  --color-menu-bg: #111827;
  --color-alert-bg: #1f1f00;
  --color-alert-text: #fde047;
  --color-alert-border: #3f3f00;
  --color-example-bg: #0a1f0a;
  --color-example-text: #86efac;
  --color-example-border: #14532d;
  --color-search-result-bg: #1a2436;
  --color-shadow: rgba(0, 0, 0, 0.4);
  --surface-tint: rgba(15, 23, 42, 0.72);
  --surface-backdrop: rgba(17, 24, 39, 0.62);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.5);

  --focus-ring: 0 0 0 3px rgba(96, 165, 250, 0.35);
}

[data-theme='dark'] main > .container,
[data-theme='dark'] .search-panel,
[data-theme='dark'] .card,
[data-theme='dark'] .search-result,
[data-theme='dark'] .faq-item {
  border-color: rgba(148, 163, 184, 0.22);
}

[data-theme='dark'] .breadcrumbs,
[data-theme='dark'] .toc,
[data-theme='dark'] .quick-ref,
[data-theme='dark'] .comparison-table {
  background: rgba(15, 23, 42, 0.52);
}

[data-theme='dark'] .comparison-table th {
  border-inline-end: 1px solid rgba(255, 255, 255, 0.2);
}

[data-theme='dark'] .quick-ref th {
  border-inline-end: 1px solid rgba(148, 163, 184, 0.28);
}

[data-theme='dark'] .breadcrumbs span {
  background: rgba(30, 58, 95, 0.8);
  border-color: rgba(147, 197, 253, 0.45);
  color: #bfdbfe;
}

/* ===== Accessibility ===== */
.skip-link {
  position: absolute;
  top: -100%;
  inset-inline-start: var(--space-md);
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  color: #fff;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--border-radius);
  z-index: 1000;
  font-size: var(--font-size-base);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.skip-link:focus {
  inset-block-start: var(--space-md);
}

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

:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  box-shadow: var(--focus-ring);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #94a3b8 0%, #64748b 100%);
  border-radius: 5px;
  border: 2px solid var(--color-bg);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, #64748b 0%, #475569 100%);
}

@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;
  }
}

/* ===== Global Styles ===== */
html {
  /* Keep in-page anchor targets clear of the sticky navbar */
  scroll-padding-top: calc(var(--navbar-height) + 16px);
}

:target,
main h2[id],
main h3[id] {
  scroll-margin-top: calc(var(--navbar-height) + 16px);
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  margin: 0;
  padding: 0;
  background:
    radial-gradient(circle at 10% 8%, rgba(37, 99, 235, 0.08), transparent 28%),
    radial-gradient(circle at 88% 18%, rgba(249, 115, 22, 0.08), transparent 24%), var(--color-bg);
  color: var(--color-text);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition:
    background-color 0.3s ease,
    color 0.3s ease;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.08) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(circle at center, rgba(0, 0, 0, 0.5), transparent 80%);
  z-index: -1;
}

:is(p, ul) {
  text-align: start;
}

a {
  color: var(--color-link);
  text-decoration: none;
  transition:
    color var(--transition-fast),
    text-decoration-color var(--transition-fast);
  text-decoration-thickness: 0.09em;
  text-underline-offset: 0.15em;
}

a:hover {
  text-decoration: underline;
}

.container p a,
.container li a {
  text-decoration: none;
  background-image: linear-gradient(var(--color-accent), var(--color-accent));
  background-size: 0% 2px;
  background-position: left bottom;
  background-repeat: no-repeat;
  transition:
    color var(--transition-fast),
    background-size 0.3s cubic-bezier(0.2, 0.6, 0.2, 1);
  padding-bottom: 1px;
}

.container p a:hover,
.container li a:hover {
  background-size: 100% 2px;
}

a:visited:not(.btn) {
  color: color-mix(in srgb, var(--color-link) 78%, #6d28d9);
}

ul {
  padding-inline-start: 20px;
}

ul li {
  margin: var(--space-xs) 0;
}

/* ===== Typography ===== */
h1 {
  font-size: var(--font-size-h1);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  letter-spacing: -0.015em;
}

h2 {
  font-size: var(--font-size-h2);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  border-block-end: 2px solid var(--color-border);
  padding-block-end: var(--space-sm);
  margin-top: var(--space-2xl);
  position: relative;
  letter-spacing: -0.01em;
}

.page-content .container > h2,
.page-hub .container > h2 {
  padding-top: 0.95rem;
}

.page-content .container > h2::before,
.page-hub .container > h2::before {
  content: 'Section';
  position: absolute;
  top: -0.35rem;
  left: 0;
  font-size: 0.67rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  font-weight: var(--font-weight-semibold);
}
:lang(es) .page-content .container > h2::before,
:lang(es) .page-hub .container > h2::before {
  content: 'Sección';
}
:lang(it) .page-content .container > h2::before,
:lang(it) .page-hub .container > h2::before {
  content: 'Sezione';
}

h3 {
  font-size: clamp(1.2rem, 1rem + 0.35vw, 1.38rem);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.container > h2:not(:first-of-type) {
  margin-top: clamp(2.1rem, 2vw + 1rem, 3rem);
}

.container > h2:not(:first-of-type)::before {
  content: '';
  display: block;
  height: 1px;
  width: 100%;
  margin-bottom: var(--space-md);
  background: linear-gradient(90deg, transparent, var(--color-border), transparent);
}

p,
li {
  line-height: 1.78;
}

h2::after {
  content: '';
  position: absolute;
  bottom: -2px;
  inset-inline-start: 0;
  width: 3rem;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--page-accent));
  border-radius: 1px;
}

/* ===== Container ===== */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
  box-sizing: border-box;
}

main > .container {
  background: linear-gradient(180deg, var(--surface-tint), var(--color-surface));
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-xl);
  backdrop-filter: blur(6px);
}

.page-shell--hub .container,
.page-shell--content .container {
  position: relative;
}

.page-hub main > .container {
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.08), var(--color-surface) 14%);
}

.page-content main > .container {
  background: linear-gradient(180deg, rgba(249, 115, 22, 0.06), var(--color-surface) 12%);
}

/* Constrain the reading measure of body prose (~70ch) for readability on wide
   screens, while leaving tables, grids and figures free to use the full width. */
.page-content main > .container > p,
.page-content main > .container > ul,
.page-content main > .container > ol,
.page-content main > .container > h2,
.page-content main > .container > h3,
.page-content main > .container > h4,
.page-content main > .container > blockquote,
.page-content main > .container > .alert,
.page-content main > .container > .example-box,
.page-content main > .container > .quick-answer {
  max-width: 70ch;
}

.page-home .hero {
  background: linear-gradient(135deg, #0f172a 0%, #1d4ed8 52%, #0ea5e9 100%);
}

[data-hub='legal'] .hero {
  background: linear-gradient(135deg, #0f172a 0%, #065f46 52%, #10b981 100%);
}

[data-hub='technical'] .hero {
  background: linear-gradient(135deg, #0f172a 0%, #5b21b6 52%, #8b5cf6 100%);
}

[data-hub='daily-life'] .hero {
  background: linear-gradient(135deg, #0f172a 0%, #92400e 52%, #f59e0b 100%);
}

[data-theme='dark'] .hero {
  background: linear-gradient(135deg, #020617 0%, #0f172a 52%, #1e293b 100%);
}

[data-theme='dark'] [data-hub='legal'] .hero {
  background: linear-gradient(135deg, #020617 0%, #064e3b 52%, #0f172a 100%);
}

[data-theme='dark'] [data-hub='technical'] .hero {
  background: linear-gradient(135deg, #020617 0%, #3b0764 52%, #0f172a 100%);
}

[data-theme='dark'] [data-hub='daily-life'] .hero {
  background: linear-gradient(135deg, #020617 0%, #78350f 52%, #0f172a 100%);
}

.page-hub {
  --page-accent: #14b8a6;
}

[data-hub='legal'] { --page-accent: #10b981; }
[data-hub='technical'] { --page-accent: #8b5cf6; }
[data-hub='daily-life'] { --page-accent: #f59e0b; }

.page-content {
  --page-accent: #64748b;
}

.page-shell--hub .container::before,
.page-shell--content .container::before {
  content: '';
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
  background: linear-gradient(
    90deg,
    var(--color-primary),
    var(--page-accent),
    var(--color-primary)
  );
  opacity: 0.55;
  pointer-events: none;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  padding: var(--space-sm) var(--space-lg);
  border: 2px solid transparent;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  line-height: 1.5;
}

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

.btn:active {
  transform: translateY(1px) scale(0.97);
  transition-duration: 0.08s;
}

.btn--primary {
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  color: #fff;
}

.btn--primary:visited {
  color: #fff;
}

.btn--primary:hover {
  background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
  color: #fff;
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn--secondary {
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-color: #93c5fd;
}

.btn--secondary:hover {
  background: var(--color-primary-light);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

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

.btn--ghost:hover {
  background: var(--color-bg);
  border-color: var(--color-primary);
}

.btn--lg {
  padding: 0.75rem var(--space-xl);
  font-size: var(--font-size-lg);
  border-radius: var(--border-radius);
}

/* Base button styles (zero specificity) */
:where(button, #menu-toggle) {
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  color: white;
  border: none;
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

:where(button, #menu-toggle)::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.15) 0%, transparent 100%);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

:where(button, #menu-toggle):hover {
  background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

:where(button, #menu-toggle):hover::before {
  opacity: 1;
}

/* ===== Form Controls ===== */
:where(input, select, textarea):not([type='checkbox']):not([type='radio']) {
  border-radius: var(--border-radius);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    background-color var(--transition-fast);
}

:where(input, select, textarea):not([type='checkbox']):not([type='radio']):hover {
  border-color: var(--color-primary);
}

:where(input, select, textarea):not([type='checkbox']):not([type='radio']):focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15), 0 0 16px rgba(37, 99, 235, 0.08);
}

/* ===== TopNav ===== */
.topnav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
  padding: 0 var(--space-lg);
  min-height: 64px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  backdrop-filter: none;
}

@supports ((-webkit-backdrop-filter: blur(8px)) or (backdrop-filter: blur(8px))) {
  .topnav {
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
  }
}

.topnav--at-top {
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.85) 0%, rgba(30, 41, 59, 0.8) 100%);
  box-shadow: none;
  border-bottom-color: transparent;
}

@supports ((-webkit-backdrop-filter: blur(12px)) or (backdrop-filter: blur(12px))) {
  .topnav--at-top {
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
  }
}

.topnav--scrolled {
  background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
  box-shadow: var(--shadow-md);
}

.topnav__brand {
  color: #ffffff;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: -0.01em;
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
}

.topnav__brand::before {
  content: '';
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 6px;
  background: conic-gradient(from 45deg, #10b981, #2563eb, #8b5cf6, #f59e0b, #10b981);
  flex-shrink: 0;
  box-shadow: 0 0 8px rgba(37, 99, 235, 0.4);
}

.topnav__brand:visited {
  color: #ffffff;
}

.topnav a.topnav__brand,
.topnav a.topnav__brand:visited {
  color: #ffffff;
}

.topnav__brand:hover {
  text-decoration: none;
  color: #f2f6ff;
}

.topnav__toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  padding: var(--space-sm);
  line-height: 1;
}

.topnav__menu {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.topnav__links {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-xs);
}

.topnav__links a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-fast);
  white-space: nowrap;
  position: relative;
}

.topnav__links a:visited {
  color: rgba(255, 255, 255, 0.85);
}

.topnav__links a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
  text-decoration: none;
}

.topnav__links a::after {
  content: '';
  position: absolute;
  inset-inline: 0.55rem;
  bottom: 0.3rem;
  height: 2px;
  background: linear-gradient(90deg, #60a5fa, #f97316);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-fast);
  border-radius: 2px;
}

.topnav__links a:hover::after,
.topnav__links a[aria-current='page']::after {
  transform: scaleX(1);
}

.topnav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.theme-toggle {
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.7);
  font-size: 1.25rem;
  cursor: pointer;
  padding: var(--space-xs) var(--space-sm);
  min-height: 44px;
  min-width: 44px;
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.theme-toggle__icon::before {
  content: '☾';
}

.theme-toggle__icon[data-mode='light']::before {
  content: '☀';
}

.theme-toggle__icon[data-mode='dark']::before {
  content: '☾';
}

.theme-toggle__icon[data-mode='system']::before {
  content: '⚙';
}

/* Language dropdown */
.topnav__lang-dropdown {
  position: relative;
  margin-inline-start: var(--space-sm);
}

.topnav__lang-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 24px;
  color: #fff;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  padding: 6px 16px;
  min-height: 44px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.topnav__lang-btn::after {
  content: '▼';
  font-size: 0.5rem;
  opacity: 0.7;
}

.topnav__lang-btn:hover,
.topnav__lang-btn[aria-expanded='true'] {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.4);
  transform: translateY(-1px);
}

.topnav__lang-menu {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: var(--border-radius-lg);
  list-style: none;
  padding: 8px;
  min-width: 140px;
  z-index: 200;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
  opacity: 0;
  transform: translateY(-4px) scale(0.98);
  transform-origin: top right;
  pointer-events: none;
  transition:
    opacity var(--transition-fast),
    transform var(--transition-fast);
}

.topnav__lang-dropdown:focus-within .topnav__lang-menu {
  display: block;
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.topnav__lang-menu.open {
  display: block;
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.topnav__lang-menu li {
  margin: 0;
}

.topnav__lang-menu a {
  display: block;
  padding: 8px 14px;
  color: var(--color-text);
  text-decoration: none;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--border-radius-sm);
  transition: background var(--transition-fast);
}

.topnav__lang-menu a:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
  text-decoration: none;
}

/* Ensure dropdown opens reliably when toggled by JS */
.topnav__lang-menu.open,
.topnav__lang-btn[aria-expanded='true'] + .topnav__lang-menu {
  display: block !important;
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

/* Active nav link indicator */
.topnav__links a[aria-current='page'] {
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes sheenSweep {
  from {
    transform: translateX(-120%);
    opacity: 0;
  }
  30% {
    opacity: 0.25;
  }
  to {
    transform: translateX(120%);
    opacity: 0;
  }
}

.hero__title,
.hero__subtitle,
.hero .btn,
.card,
.search-panel,
.faq-item {
  animation: fadeUp 0.5s ease both;
}

.hero__subtitle {
  animation-delay: 0.08s;
}

.hero .btn {
  animation-delay: 0.14s;
}

.card::after {
  content: '';
  position: absolute;
  inset: auto 0 0 0;
  height: 3px;
  background: linear-gradient(90deg, var(--page-accent), var(--color-primary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s cubic-bezier(0.2, 0.6, 0.2, 1);
  pointer-events: none;
  border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg);
}

.card:hover::after {
  transform: scaleX(1);
}

.search-result::after {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  background: linear-gradient(
    110deg,
    transparent 35%,
    rgba(255, 255, 255, 0.24) 50%,
    transparent 65%
  );
  pointer-events: none;
  animation: sheenSweep 0.9s ease 0.25s 1 forwards;
}

.card:nth-child(2n) {
  animation-delay: 0.06s;
}

.card:nth-child(3n) {
  animation-delay: 0.11s;
}

/* ===== Hero ===== */
.hero {
  background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 50%, #2563eb 100%);
  color: #fff;
  padding: var(--space-4xl) var(--space-lg);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero--home {
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(37, 99, 235, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(251, 146, 60, 0.1) 0%, transparent 40%),
    radial-gradient(2px 2px at 15% 25%, rgba(255,255,255,0.15), transparent),
    radial-gradient(2px 2px at 40% 65%, rgba(255,255,255,0.1), transparent),
    radial-gradient(1.5px 1.5px at 60% 15%, rgba(255,255,255,0.12), transparent),
    radial-gradient(1.5px 1.5px at 85% 45%, rgba(255,255,255,0.08), transparent),
    radial-gradient(2px 2px at 30% 85%, rgba(255,255,255,0.1), transparent),
    radial-gradient(1px 1px at 70% 75%, rgba(255,255,255,0.14), transparent),
    radial-gradient(1.5px 1.5px at 50% 40%, rgba(255,255,255,0.06), transparent),
    radial-gradient(2px 2px at 10% 60%, rgba(255,255,255,0.09), transparent);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  inset: auto -12% -38% auto;
  width: 55%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.14) 0%, rgba(255, 255, 255, 0) 70%);
  pointer-events: none;
}

.hero__inner::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 600px;
  height: 600px;
  transform: translate(-50%, -50%);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

.hero__inner::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 380px;
  height: 380px;
  transform: translate(-50%, -50%) rotate(35deg);
  border: 1px dashed rgba(255, 255, 255, 0.04);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

.hero__title,
.hero__subtitle,
.hero .btn {
  position: relative;
  z-index: 1;
}

@keyframes heroFadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero__inner {
  max-width: var(--container-max-width);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--font-size-hero);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin: 0 0 var(--space-md);
  color: #fff;
  border: none;
  padding: 0;
  animation: heroFadeUp 0.7s cubic-bezier(0.2, 0.6, 0.2, 1) 0.1s both;
}

.hero__subtitle {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.85);
  max-width: 640px;
  margin: 0 auto var(--space-xl);
  text-align: center;
  line-height: var(--line-height-relaxed);
  animation: heroFadeUp 0.7s cubic-bezier(0.2, 0.6, 0.2, 1) 0.25s both;
}

.hero .btn {
  animation: heroFadeUp 0.7s cubic-bezier(0.2, 0.6, 0.2, 1) 0.4s both;
}

.hero .btn--primary {
  /* Darkened so white button text meets WCAG AA (>=4.5:1) in light mode */
  background: linear-gradient(135deg, #c2410c 0%, #9a3412 100%);
  color: #fff;
  box-shadow: 0 4px 16px rgba(249, 115, 22, 0.35);
}

.hero .btn--primary:hover {
  background: linear-gradient(135deg, #9a3412 0%, #7c2d12 100%);
  box-shadow: 0 8px 24px rgba(249, 115, 22, 0.45);
}

[data-theme='dark'] .hero .btn--primary {
  background: linear-gradient(135deg, #c2410c 0%, #9a3412 100%);
  box-shadow: 0 4px 16px rgba(194, 65, 12, 0.3);
  color: #fff;
}

[data-theme='dark'] .hero .btn--primary:hover {
  background: linear-gradient(135deg, #9a3412 0%, #7c2d12 100%);
  box-shadow: 0 8px 24px rgba(194, 65, 12, 0.4);
}

/* ===== Card Grid ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin: var(--space-xl) 0;
}

@media (min-width: 1025px) {
  .card-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: clamp(1rem, 1.6vw, 1.6rem);
  }
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  text-decoration: none;
  color: var(--color-text);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--border-radius-lg);
  padding: 1px;
  background: linear-gradient(135deg, transparent 40%, var(--color-primary) 100%);
  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-hover), 0 0 0 1px rgba(37, 99, 235, 0.12);
  border-color: transparent;
  transform: translateY(-4px);
  text-decoration: none;
  color: var(--color-text);
}

.card:active {
  transform: translateY(-1px) scale(0.995);
  box-shadow: var(--shadow-md);
}

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

.card__icon {
  font-size: 1.65rem;
  margin-bottom: var(--space-md);
  line-height: 1;
  width: 3rem;
  height: 3rem;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(145deg, color-mix(in srgb, var(--page-accent) 12%, var(--color-surface)), color-mix(in srgb, var(--page-accent) 6%, transparent));
  border: 1px solid color-mix(in srgb, var(--page-accent) 20%, transparent);
  box-shadow: 0 2px 8px color-mix(in srgb, var(--page-accent) 10%, transparent);
  transition: all var(--transition-base);
}

.card:hover .card__icon {
  transform: scale(1.08) rotate(-3deg);
  box-shadow: 0 4px 12px color-mix(in srgb, var(--page-accent) 22%, transparent);
  background: linear-gradient(145deg, color-mix(in srgb, var(--page-accent) 18%, var(--color-surface)), color-mix(in srgb, var(--page-accent) 10%, transparent));
}

.card__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin: 0 0 0.65rem;
  padding: 0;
  border: none;
  color: var(--color-text);
  line-height: 1.35;
}

.card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.7;
  text-align: start;
}

.card__title::after {
  content: ' \2192';
  opacity: 0;
  transform: translateX(-4px);
  display: inline-block;
  transition: all var(--transition-base);
  font-weight: 400;
}

.card:hover .card__title::after {
  opacity: 0.6;
  transform: translateX(2px);
}

.page-hub .card {
  border-inline-start: 3px solid color-mix(in srgb, var(--page-accent) 50%, transparent);
}

.page-hub .card:hover {
  border-inline-start-color: var(--page-accent);
}

.badge {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 2px 8px;
  border-radius: 9999px;
  background: #fff7ed;
  color: #c2410c;
  border: 1px solid #fed7aa;
  margin-inline-start: var(--space-sm);
  vertical-align: middle;
}

[data-theme='dark'] .badge {
  background: rgba(249, 115, 22, 0.15);
  color: #fb923c;
  border-color: rgba(249, 115, 22, 0.3);
}

/* ===== Search Panel ===== */
.search-panel {
  background: var(--color-surface);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
  max-width: 640px;
  margin: var(--space-xl) auto;
}

.search-panel__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin: 0 0 var(--space-md);
  color: var(--color-text);
  border: none;
  padding: 0;
}

.search-box {
  display: flex;
  gap: var(--space-sm);
  align-items: stretch;
}

.search-box__input-wrap {
  flex: 1;
  position: relative;
}

.search-box__icon {
  position: absolute;
  inset-inline-start: var(--space-md);
  inset-block-start: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  font-size: var(--font-size-lg);
  pointer-events: none;
}

.search-box__input {
  width: 100%;
  padding: 0.875rem 1rem 0.875rem 2.75rem;
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  background: var(--color-surface);
  color: var(--color-text);
  transition: all var(--transition-base);
  box-sizing: border-box;
}

.search-box__input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow:
    0 0 0 4px rgba(37, 99, 235, 0.15),
    var(--shadow-md);
}

/* ===== Breadcrumbs ===== */
.breadcrumbs {
  max-width: var(--container-max-width);
  margin: var(--space-lg) auto;
  padding: var(--space-xs) var(--space-lg);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  background: transparent;
  border-radius: 0;
  border: none;
}

.breadcrumbs ol {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumbs li + li::before {
  content: '/';
  margin: 0 0.1rem;
  color: var(--color-border);
  font-weight: var(--font-weight-semibold);
}

.breadcrumbs a {
  color: #475569; /* darker than --color-text-muted to clear WCAG AA on the light bg */
  text-decoration: none;
  padding: 0.2rem 0.6rem;
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

[data-theme='dark'] .breadcrumbs a {
  color: var(--color-text-muted);
}

.breadcrumbs a:hover {
  color: var(--color-primary);
  background: var(--color-primary-light);
  text-decoration: none;
  border-color: #bfdbfe;
}

.breadcrumbs span {
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-weight: var(--font-weight-semibold);
  border: 1px solid #bfdbfe;
}

/* ===== Site Footer ===== */
.site-footer {
  background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
  color: var(--color-footer-text);
  margin-top: auto;
  padding: var(--space-3xl) var(--space-lg) var(--space-xl);
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  inset-inline-start: 0;
  inset-inline-end: 0;
  height: 3px;
  background: linear-gradient(90deg, #2563eb, #f97316, #2563eb);
}

.site-footer::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 80%, rgba(37, 99, 235, 0.06) 0%, transparent 50%),
              radial-gradient(circle at 80% 20%, rgba(249, 115, 22, 0.04) 0%, transparent 40%);
  pointer-events: none;
}

.site-footer__inner {
  max-width: var(--container-max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl) var(--space-3xl);
  align-items: start;
}

.site-footer__nav {
  grid-column: 1 / -1;
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md) var(--space-xl);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer__links a {
  color: var(--color-footer-text);
  font-size: var(--font-size-sm);
  text-decoration: none;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
}

.site-footer__links a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
  text-decoration: none;
}

.site-footer__support {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-lg);
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--border-radius);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.site-footer__support p {
  margin: 0;
  font-size: var(--font-size-sm);
  text-align: center;
}

.site-footer__support p:first-child {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.72);
}

.site-footer__support img {
  height: 56px;
  width: auto;
  transition: opacity var(--transition-fast);
}

.site-footer__support img:hover {
  opacity: 0.85;
}

.site-footer__contact {
  font-size: var(--font-size-sm);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--border-radius);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.07);
}

.site-footer__contact a {
  color: rgba(255, 255, 255, 0.8);
}

.site-footer__contact a:hover {
  color: #fff;
}

[data-theme='dark'] a {
  color: #7cc0ff;
}

[data-theme='dark'] a:hover {
  color: #bfdbfe;
}

[data-theme='dark'] .topnav__lang-menu a {
  color: #1e293b;
}

.site-footer__disclaimer {
  grid-column: 1 / -1;
  font-size: var(--font-size-base);
  color: #fff;
  border-block-start: 1px solid rgba(255, 255, 255, 0.08);
  padding-block-start: var(--space-lg);
  width: 100%;
  text-align: center;
  margin: 0;
}

/* ===== Accordion ===== */
summary {
  list-style: none;
}

summary::-webkit-details-marker {
  display: none;
}

.accordion-title {
  font-size: var(--font-size-h2);
  font-weight: bold;
  color: var(--color-primary);
  padding-inline-start: var(--space-lg);
  position: relative;
  cursor: pointer;
  margin-block-end: var(--space-md);
}

.accordion-title::before {
  content: '\25B6';
  position: absolute;
  inset-inline-start: 0;
  inset-block-start: 0.1rem;
  font-size: 1.2rem;
  transition: transform var(--transition-fast);
}

details[open] .accordion-title::before {
  transform: rotate(90deg);
}

/* ===== FAQ Items ===== */
.faq-item {
  margin-block-end: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  overflow: hidden;
  margin-block: var(--space-sm);
  background: var(--color-surface);
  transition: all var(--transition-base);
}

.faq-item:hover {
  border-color: var(--color-primary);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.1);
}

.faq-item summary {
  font-weight: 600;
  cursor: pointer;
  padding: var(--space-md) var(--space-lg);
  padding-inline-start: var(--space-2xl);
  position: relative;
  color: var(--color-text);
  background: var(--color-surface);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.faq-item summary:hover {
  background: var(--color-primary-light);
}

.faq-item summary::before {
  content: '+';
  position: absolute;
  inset-inline-start: var(--space-md);
  font-size: 1.25rem;
  font-weight: 400;
  transition: transform var(--transition-fast);
  color: var(--color-primary);
  top: 50%;
  transform: translateY(-50%);
  line-height: 1;
}

.faq-item[open] summary::before {
  content: '\2212';
  transform: translateY(-50%) rotate(180deg);
}

.faq-item p {
  padding: var(--space-md) var(--space-lg);
  padding-inline-start: var(--space-2xl);
  margin-block-start: 0;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  border-inline-start: 3px solid transparent;
  animation: faqReveal var(--transition-slow) both;
}

.faq-item[open] {
  border-color: #93c5fd;
  box-shadow: 0 2px 12px rgba(37, 99, 235, 0.08);
}

.faq-item[open] p {
  border-inline-start-color: var(--color-primary);
}

.faq-item[open] summary {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

@keyframes faqReveal {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.search-result {
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-lg);
  margin: var(--space-md) 0;
  background-color: var(--color-surface);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.search-result:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.search-result h3 {
  margin: 0;
  font-size: calc(var(--font-size-base) + 0.125rem);
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}

.search-result h3 a {
  text-decoration: none;
}

.search-result h3 a:hover {
  text-decoration: underline;
}

.search-result p {
  margin-top: var(--space-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.search-empty,
.search-error {
  margin: var(--space-lg) 0;
  padding: var(--space-lg);
  border-radius: var(--border-radius);
  border: 1px solid var(--color-border);
  background: linear-gradient(135deg, var(--color-surface), var(--color-bg));
  color: var(--color-text-muted);
  text-align: center;
}

.search-empty::before {
  content: '🔎';
  display: block;
  font-size: 1.45rem;
  margin-bottom: 0.35rem;
}

.search-error::before {
  content: '⚠️';
  display: block;
  font-size: 1.35rem;
  margin-bottom: 0.35rem;
}

.search-suggestions {
  margin-top: var(--space-2xl);
  text-align: center;
  color: var(--color-text-muted);
}

.search-suggestions__title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin: 0 0 var(--space-md);
  border: none;
  padding: 0;
}

.search-suggestions__title::after {
  display: none;
}

.search-suggestions__tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
  list-style: none;
  margin: 0;
  padding: 0;
}

.search-suggestions__tags a {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.search-suggestions__tags a:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
  color: var(--color-primary);
  text-decoration: none;
}

/* ===== Alert & Example Boxes ===== */
.alert {
  background: linear-gradient(135deg, var(--color-alert-bg) 0%, #fefce8 100%);
  color: var(--color-alert-text);
  border: 1px solid var(--color-alert-border);
  padding: var(--space-lg);
  border-radius: var(--border-radius);
  margin-top: var(--space-xl);
  position: relative;
  padding-inline-start: 3.5rem;
}

.alert::before {
  content: '';
  position: absolute;
  inset-inline-start: var(--space-md);
  top: var(--space-lg);
  width: 1.25rem;
  height: 1.25rem;
  background: currentColor;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='currentColor'%3E%3Cpath fill-rule='evenodd' d='M18 10a8 8 0 11-16 0 8 8 0 0116 0zm-7-4a1 1 0 11-2 0 1 1 0 012 0zM9 9a.75.75 0 000 1.5h.253a.25.25 0 01.244.304l-.459 2.066A1.75 1.75 0 0010.747 15H11a.75.75 0 000-1.5h-.253a.25.25 0 01-.244-.304l.459-2.066A1.75 1.75 0 009.253 9H9z' clip-rule='evenodd'/%3E%3C/svg%3E") center / contain no-repeat;
}

.alert strong {
  display: block;
  margin-bottom: var(--space-xs);
}

.alert--warning,
.alert[data-type='warning'] {
  background: linear-gradient(135deg, #fff7ed 0%, #ffedd5 100%);
  border-color: #fdba74;
  color: #9a3412;
}

.alert--warning::before,
.alert[data-type='warning']::before {
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='currentColor'%3E%3Cpath fill-rule='evenodd' d='M8.485 2.495c.673-1.167 2.357-1.167 3.03 0l6.28 10.875c.673 1.167-.17 2.625-1.516 2.625H3.72c-1.347 0-2.189-1.458-1.515-2.625L8.485 2.495zM10 5a.75.75 0 01.75.75v3.5a.75.75 0 01-1.5 0v-3.5A.75.75 0 0110 5zm0 9a1 1 0 100-2 1 1 0 000 2z' clip-rule='evenodd'/%3E%3C/svg%3E");
}

.alert--success,
.alert[data-type='success'] {
  background: linear-gradient(135deg, #ecfdf5 0%, #dcfce7 100%);
  border-color: #86efac;
  color: #166534;
}

.alert--success::before,
.alert[data-type='success']::before {
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='currentColor'%3E%3Cpath fill-rule='evenodd' d='M10 18a8 8 0 100-16 8 8 0 000 16zm3.857-9.809a.75.75 0 00-1.214-.882l-3.483 4.79-1.88-1.88a.75.75 0 10-1.06 1.061l2.5 2.5a.75.75 0 001.137-.089l4-5.5z' clip-rule='evenodd'/%3E%3C/svg%3E");
}

.alert--tip,
.alert[data-type='tip'] {
  background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
  border-color: #93c5fd;
  color: #1e3a8a;
}

.alert--tip::before,
.alert[data-type='tip']::before {
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='currentColor'%3E%3Cpath d='M10 1a6 6 0 00-3.815 10.631C7.237 12.5 8 13.443 8 14.456v.044a2 2 0 004 0v-.044c0-1.013.762-1.957 1.815-2.825A6 6 0 0010 1zM8.5 18a1.5 1.5 0 003 0h-3z'/%3E%3C/svg%3E");
}

[data-theme='dark'] .alert {
  background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
  border-color: #374151;
  color: #e5e7eb;
}

[data-theme='dark'] .alert--warning,
[data-theme='dark'] .alert[data-type='warning'] {
  background: linear-gradient(135deg, #3a2b12 0%, #2a1f0d 100%);
  border-color: #92400e;
  color: #fcd34d;
}

[data-theme='dark'] .alert--success,
[data-theme='dark'] .alert[data-type='success'] {
  background: linear-gradient(135deg, #10281a 0%, #0b1f13 100%);
  border-color: #166534;
  color: #86efac;
}

[data-theme='dark'] .alert--tip,
[data-theme='dark'] .alert[data-type='tip'] {
  background: linear-gradient(135deg, #12263f 0%, #0d1c30 100%);
  border-color: #1d4ed8;
  color: #bfdbfe;
}

.example-box {
  background: linear-gradient(135deg, var(--color-example-bg) 0%, #f0fdf4 100%);
  color: var(--color-example-text);
  border: 1px solid var(--color-example-border);
  padding: var(--space-lg);
  border-radius: var(--border-radius);
  margin-top: var(--space-md);
  position: relative;
  padding-inline-start: 3.5rem;
}

[data-theme='dark'] .example-box {
  background: linear-gradient(135deg, var(--color-example-bg) 0%, #0b1f13 100%);
}

.example-box::before {
  content: '💡';
  position: absolute;
  inset-inline-start: var(--space-md);
  top: var(--space-lg);
  font-size: 1.25rem;
}

/* ===== Figure Inline ===== */
.figure-inline {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  margin: var(--space-xl) 0;
}
.figure-inline__media {
  max-width: 30%;
  flex-shrink: 0;
}
.figure-inline__media img {
  width: 100%;
  height: auto;
}
.figure-inline__caption {
  flex: 1;
  text-align: start;
}

/* ===== Scroll-to-Top ===== */
.scroll-top {
  position: fixed;
  inset-block-end: var(--space-xl);
  inset-inline-end: var(--space-xl);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  color: #fff;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.4);
  z-index: 90;
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
}

.scroll-top:hover {
  background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.5);
}

.scroll-top[hidden] {
  display: none;
}

/* ===== Reading Progress ===== */
.reading-progress {
  position: fixed;
  inset-block-start: 0;
  inset-inline-start: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  z-index: 101;
  width: 0;
  transition: none;
  box-shadow: 0 0 8px rgba(37, 99, 235, 0.4);
}

/* Scroll-driven fill only where supported; otherwise JS sets width on scroll.
   (Without this guard the duration-less animation instantly fills the bar.) */
@supports (animation-timeline: scroll()) {
  .reading-progress {
    animation: reading-progress-fill linear forwards;
    animation-timeline: scroll();
  }
}

@keyframes reading-progress-fill {
  from {
    width: 0;
  }
  to {
    width: 100%;
  }
}

/* ===== Reading Time ===== */
.reading-time {
  display: inline-block;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  background: var(--color-bg);
  padding: 0.15em 0.6em;
  border-radius: 999px;
  margin-block-end: var(--space-md);
  border: 1px solid var(--color-border);
  padding-inline-start: 1.5em;
  position: relative;
}

.reading-time::before {
  content: '⏱';
  position: absolute;
  left: 0.5em;
  top: 50%;
  transform: translateY(-50%);
}

/* ===== Table of Contents ===== */
.toc {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--space-md);
  margin-block-end: var(--space-xl);
  box-shadow: var(--shadow-sm);
}

.toc__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  padding: 0;
}

.toc__title::-webkit-details-marker {
  display: none;
}

.toc__list,
.toc__sublist {
  margin: var(--space-sm) 0 0;
  padding-inline-start: var(--space-lg);
  list-style: decimal;
}

.toc__sublist {
  list-style: lower-alpha;
  margin-block-start: var(--space-xs);
}

.toc__link {
  color: var(--color-text);
  text-decoration: none;
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  transition: color var(--transition-fast);
}

.toc__link:hover {
  color: var(--color-primary);
  text-decoration: none;
  background: var(--color-primary-light);
  border-radius: var(--border-radius-sm);
  padding-inline: var(--space-xs);
}

.toc__link.active {
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}

/* Desktop: sidebar TOC */
@media (min-width: 1024px) {
  .container.has-toc {
    display: grid;
    grid-template-columns: 1fr 240px;
    column-gap: var(--space-xl);
    row-gap: 0;
  }

  .container.has-toc > h1 {
    grid-column: 1 / -1;
  }

  .container.has-toc > *:not(.toc) {
    grid-column: 1;
  }

  .toc {
    position: sticky;
    inset-block-start: 72px;
    align-self: start;
    max-height: calc(100vh - 100px);
    overflow-y: auto;
    grid-column: 2;
    grid-row: 2 / 20;
  }
}

/* ===== Scroll Animations ===== */
.animate-ready {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 0.5s ease,
    transform 0.5s ease;
}

.animate-in {
  opacity: 1;
  transform: translateY(0);
}

/* ===== View Transitions ===== */
@view-transition {
  navigation: auto;
}

/* ===== Search Highlighting ===== */
mark {
  background: var(--color-alert-bg);
  color: var(--color-alert-text);
  padding: 0 2px;
  border-radius: 2px;
}

/* ===== Live Search Dropdown ===== */
.search-dropdown {
  position: absolute;
  inset-block-start: 100%;
  inset-inline-start: 0;
  inset-inline-end: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  max-height: 320px;
  overflow-y: auto;
  z-index: 200;
  margin-block-start: var(--space-xs);
}

.search-dropdown[hidden] {
  display: none;
}

.search-dropdown__item {
  padding: var(--space-sm) var(--space-md);
  border-block-end: 1px solid var(--color-border);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.search-dropdown__item:last-child {
  border-block-end: none;
}

.search-dropdown__item:hover,
.search-dropdown__item--active {
  background: var(--color-primary-light);
}

.search-dropdown__item a {
  color: var(--color-text);
  text-decoration: none;
  display: block;
}

/* ===== Media Queries ===== */
@media (min-width: 1200px) {
  body {
    font-size: clamp(1.08rem, 1rem + 0.2vw, 1.22rem);
  }

  p,
  li {
    line-height: 1.82;
  }
}

@media (max-width: 1024px) {
  /* TopNav mobile */
  .topnav {
    flex-wrap: wrap;
    padding: 0 var(--space-md);
    gap: 0;
  }

  .topnav__toggle {
    display: block;
  }

  .topnav__menu {
    display: none;
    flex-direction: column;
    width: 100%;
    padding-bottom: var(--space-sm);
    align-items: stretch;
    background: rgba(15, 23, 42, 0.88);
    border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg);
    box-shadow: 0 16px 24px -16px rgba(15, 23, 42, 0.6);
  }

  .topnav__menu.show {
    display: flex;
  }

  .topnav__links {
    flex-direction: column;
    gap: 0;
  }

  .topnav__links a {
    padding: var(--space-sm) var(--space-md);
  }

  .topnav__actions {
    justify-content: center;
    padding: var(--space-sm) 0;
    border-block-start: 1px solid rgba(255, 255, 255, 0.1);
  }

  .topnav__lang-menu {
    right: auto;
    left: 50%;
    transform: translateX(-50%);
  }

  /* Disable card lift on touch devices */
  .card:hover {
    transform: none;
  }

  .card:active {
    transform: scale(0.98);
  }

  /* Hero mobile */
  .hero {
    padding: var(--space-3xl) var(--space-md);
  }

  /* Card grid on tablet/phone: collapse naturally so narrow screens don't
     get two cramped columns (auto-fill drops to 1 column below ~500px). */
  .card-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  }

  /* Search box mobile */
  .search-box {
    flex-direction: column;
  }

  /* Figure inline mobile */
  .figure-inline {
    flex-direction: column;
  }
  .figure-inline__media {
    max-width: 100%;
  }

}

/* ===== Table Overflow (mobile) ===== */
@media (max-width: 768px) {
  .comparison-table,
  .quick-ref {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: var(--border-radius-lg);
    box-shadow: inset -12px 0 14px -14px rgba(15, 23, 42, 0.35);
    position: relative;
  }

  .comparison-table::after,
  .quick-ref::after {
    content: 'Swipe \2192';
    position: sticky;
    right: 0.5rem;
    float: right;
    margin-top: 0.35rem;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    background: var(--surface-backdrop);
    border: 1px solid var(--color-border);
    border-radius: 999px;
    padding: 0.1rem 0.45rem;
  }

  :lang(es) .comparison-table::after,
  :lang(es) .quick-ref::after {
    content: 'Deslizar \2192';
  }

  :lang(it) .comparison-table::after,
  :lang(it) .quick-ref::after {
    content: 'Scorri \2192';
  }

  :lang(fr) .comparison-table::after,
  :lang(fr) .quick-ref::after {
    content: 'Glisser \2192';
  }

  .comparison-table th,
  .comparison-table td,
  .quick-ref th,
  .quick-ref td {
    white-space: nowrap;
  }

  .comparison-table td:first-child,
  .quick-ref td:first-child {
    position: sticky;
    left: 0;
    background: var(--color-surface);
    z-index: 2;
    box-shadow: 8px 0 12px -10px rgba(15, 23, 42, 0.32);
  }
}

/* ===== Tablet / Small Screen (≤600px) ===== */
@media (max-width: 600px) {
  body {
    font-size: 1rem;
  }

  :is(p, ul) {
    text-align: start;
  }

  p,
  li {
    line-height: 1.66;
  }

  .container {
    padding: var(--space-lg) var(--space-md);
  }

  .container > h2:not(:first-of-type) {
    margin-top: 1.8rem;
  }

  h2 {
    margin-top: 1.7rem;
    padding-bottom: 0.35rem;
  }

  .hero {
    padding: var(--space-xl) var(--space-md);
  }

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

  .site-footer__inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .site-footer__support,
  .site-footer__contact {
    justify-self: center;
  }
}

/* ===== Print Styles ===== */
@media print {
  :is(
    nav,
    .topnav,
    .site-footer,
    .hero,
    .search-panel,
    .search-box,
    .theme-toggle,
    .skip-link,
    .scroll-top,
    .reading-progress,
    .reading-time,
    .print-bar,
    .toc,
    #navbar-placeholder,
    #footer-placeholder
  ) {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
    font-size: 12pt;
  }

  main > .container {
    max-width: 100%;
    box-shadow: none;
    border-radius: 0;
    background: none;
    margin: 0;
    padding: 0.5cm;
  }

  a[href]::after {
    content: ' (' attr(href) ')';
    font-size: 0.8em;
    color: #555;
  }

  a[href^='#']::after,
  a[href^='javascript']::after {
    content: '';
  }
}

@media (max-width: 480px) {
  .container {
    padding: var(--space-md) var(--space-sm);
  }

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

  .card {
    padding: var(--space-md);
  }

  .hero {
    padding: var(--space-xl) var(--space-sm);
  }

  .breadcrumbs {
    padding: 0 var(--space-sm);
  }

  .alert,
  .example-box {
    padding: var(--space-sm);
    padding-inline-start: var(--space-3xl);
  }

  .scroll-top {
    width: 44px;
    height: 44px;
    font-size: 1rem;
  }

  h1 {
    font-size: var(--font-size-h1);
  }

  p {
    font-size: var(--font-size-sm);
  }
}

/* ===== Last Updated ===== */
.last-updated {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-block-start: calc(-1 * var(--space-sm));
  margin-block-end: var(--space-sm);
  display: inline-flex;
  gap: 0.4rem;
  align-items: center;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0.28rem 0.65rem;
}

.last-updated::before {
  content: '🗓';
}

.last-updated time {
  font-weight: 500;
}

/* ===== Print Bar ===== */
.print-bar {
  position: static;
  margin-block-start: 0;
  margin-block-end: var(--space-lg);
  padding: 0;
  border: none;
  border-radius: 0;
  text-align: start;
  background: transparent;
  backdrop-filter: none;
  box-shadow: none;
  z-index: 30;
}

.print-bar .btn {
  font-size: var(--font-size-xs);
  padding: 0.3rem 0.75rem;
  background: var(--color-bg);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.print-bar .btn:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-color: #93c5fd;
}

.print-bar .btn::before {
  content: '🖨️';
  margin-right: 0.35rem;
}

/* ===== Related Resources ===== */
.related-resources {
  margin-top: var(--space-2xl);
  padding: var(--space-lg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  background: linear-gradient(180deg, var(--color-surface), var(--color-bg));
}

.related-resources__title {
  margin: 0 0 var(--space-sm);
  font-size: var(--font-size-lg);
  color: var(--color-text);
  border: none;
  padding: 0;
}

.related-resources__title::after {
  display: none;
}

.related-resources__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.45rem;
}

.related-resources__list a {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  text-decoration: none;
  color: var(--color-link);
  font-weight: var(--font-weight-medium);
}

.related-resources__list a::before {
  content: '→';
  color: var(--color-text-muted);
  font-weight: var(--font-weight-bold);
}

.related-resources__list a:hover {
  text-decoration: underline;
}

.related-resources__subtitle {
  margin-top: var(--space-md);
  margin-bottom: var(--space-xs);
  font-size: var(--font-size-base);
  border: none;
  padding: 0;
}

.related-resources__subtitle::after {
  display: none;
}

.related-resources__next {
  margin-top: var(--space-md);
  font-size: var(--font-size-sm);
}

.authority-sources,
.freshness-log,
.editorial-trust,
.guide-faq,
.search-intent {
  margin-top: var(--space-2xl);
  padding: var(--space-lg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  background: var(--color-surface);
}

.authority-sources {
  border-left: 4px solid #10b981;
  background: linear-gradient(135deg, var(--color-surface), rgba(16, 185, 129, 0.04));
}

.authority-sources h2::after { background: linear-gradient(90deg, #10b981, #34d399); }

.freshness-log {
  border-left: 4px solid #f59e0b;
  background: linear-gradient(135deg, var(--color-surface), rgba(245, 158, 11, 0.04));
}

.freshness-log h2::after { background: linear-gradient(90deg, #f59e0b, #fbbf24); }

.editorial-trust {
  border-left: 4px solid #6366f1;
  background: linear-gradient(135deg, var(--color-surface), rgba(99, 102, 241, 0.04));
}

.editorial-trust h2::after { background: linear-gradient(90deg, #6366f1, #818cf8); }

.search-intent {
  border-left: 4px solid #8b5cf6;
  background: linear-gradient(135deg, var(--color-surface), rgba(139, 92, 246, 0.04));
}

.search-intent h2::after { background: linear-gradient(90deg, #8b5cf6, #a78bfa); }

/* Rendered as a non-heading so the article <h1> stays first in the outline */
.search-intent__title {
  margin: 0 0 var(--space-sm);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
}

.guide-faq {
  border-left: 4px solid #0ea5e9;
  background: linear-gradient(135deg, var(--color-surface), rgba(14, 165, 233, 0.04));
}

.guide-faq h2::after { background: linear-gradient(90deg, #0ea5e9, #38bdf8); }

[data-theme='dark'] .authority-sources {
  border-left-color: #34d399;
  background: linear-gradient(135deg, var(--color-surface), rgba(16, 185, 129, 0.08));
}
[data-theme='dark'] .freshness-log {
  border-left-color: #fbbf24;
  background: linear-gradient(135deg, var(--color-surface), rgba(245, 158, 11, 0.08));
}
[data-theme='dark'] .editorial-trust {
  border-left-color: #818cf8;
  background: linear-gradient(135deg, var(--color-surface), rgba(99, 102, 241, 0.08));
}
[data-theme='dark'] .search-intent {
  border-left-color: #a78bfa;
  background: linear-gradient(135deg, var(--color-surface), rgba(139, 92, 246, 0.08));
}
[data-theme='dark'] .guide-faq {
  border-left-color: #38bdf8;
  background: linear-gradient(135deg, var(--color-surface), rgba(14, 165, 233, 0.08));
}

.authority-sources__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: var(--space-md);
}

.authority-sources h3 {
  margin-top: 0;
}

.freshness-log ul,
.editorial-trust ul {
  margin-bottom: 0;
}

.legal-disclaimer {
  margin-top: var(--space-md);
  font-size: var(--font-size-sm);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--border-radius-sm);
  background: #fff7ed;
  border: 1px solid #fdba74;
  color: #9a3412;
}

[data-theme='dark'] .legal-disclaimer {
  background: #431407;
  border-color: #9a3412;
  color: #fed7aa;
}

/* Optional quick answer box style for high-intent pages */
.quick-answer {
  margin-top: var(--space-md);
  margin-bottom: var(--space-xl);
  padding: var(--space-md) var(--space-lg);
  padding-inline-start: 3.2rem;
  border-radius: var(--border-radius);
  border: 1px solid #93c5fd;
  background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
  color: #1e293b;
  position: relative;
}

.quick-answer::before {
  content: '\1F4A1';
  position: absolute;
  inset-inline-start: var(--space-md);
  top: var(--space-md);
  font-size: 1.15rem;
}

.quick-answer strong {
  color: #1e3a8a;
}

[data-theme='dark'] .quick-answer {
  border-color: #1d4ed8;
  background: linear-gradient(135deg, #10243f 0%, #0f1f35 100%);
  color: #dbeafe;
}

[data-theme='dark'] .quick-answer strong {
  color: #93c5fd;
}

/* ===== Hub Pathways ===== */
.hub-pathways {
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.hub-pathways__title {
  margin: 0 0 var(--space-sm);
  font-size: var(--font-size-lg);
  border: none;
  color: var(--color-text);
  padding: 0;
}

.hub-pathways__title::after {
  display: none;
}

.hub-pathways__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.hub-pathways__list a {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.65rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
  text-decoration: none;
  font-size: var(--font-size-sm);
}

.hub-pathways__list a:hover {
  background: var(--color-primary-light);
  border-color: #93c5fd;
}

/* ===== Cost Calculator Form ===== */
fieldset {
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--space-lg);
  background: var(--color-bg);
}

fieldset legend {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  padding: 0 var(--space-sm);
  font-size: var(--font-size-lg);
}

fieldset input:not([type='checkbox']):not([type='radio']),
fieldset select {
  width: 100%;
  padding: 0.75rem var(--space-md);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  box-sizing: border-box;
  appearance: none;
  -webkit-appearance: none;
}

fieldset select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M2 4l4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: var(--space-2xl);
}

fieldset input:focus,
fieldset select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15), 0 0 16px rgba(37, 99, 235, 0.08);
}

fieldset select {
  cursor: pointer;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

fieldset select:hover {
  border-color: var(--color-primary);
  background-color: var(--color-bg);
}

fieldset input::placeholder {
  color: var(--color-text-muted);
  opacity: 0.7;
}

@media (min-width: 900px) {
  .print-bar {
    position: sticky;
    bottom: 0.75rem;
  }
}

@media print {
  .print-bar {
    display: none;
  }
}

/* ===== Checklist & Timeline ===== */
.timeline__phase {
  position: relative;
  padding-inline-start: var(--space-xl);
  margin-block-end: var(--space-xl);
  border-inline-start: 3px solid var(--color-primary);
  background: linear-gradient(180deg, var(--color-primary-light), transparent);
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  padding-block: var(--space-sm);
  padding-inline-end: var(--space-sm);
}

.timeline__phase::before {
  content: '';
  position: absolute;
  inset-inline-start: -8px;
  inset-block-start: 0.5em;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--color-primary);
}

.timeline__heading {
  font-size: var(--font-size-lg);
  margin-block-end: var(--space-sm);
}

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

.checklist__item {
  padding: var(--space-xs) 0;
}

.checklist__item label {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  cursor: pointer;
}

.checklist__item input[type='checkbox'] {
  margin-block-start: 0.3em;
  accent-color: var(--color-primary);
  transition: transform 0.15s ease;
}

.checklist__item input[type='checkbox']:active {
  transform: scale(1.3);
}

.checklist__item input:checked + span {
  text-decoration: line-through;
  opacity: 0.6;
  transition: opacity 0.3s ease, text-decoration-color 0.3s ease;
}

.checklist-progress {
  margin-block: var(--space-lg);
}

.checklist-progress__bar {
  height: 8px;
  background: var(--color-surface);
  border-radius: var(--border-radius-sm);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.checklist-progress__fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: var(--border-radius-sm);
  transition: width 0.3s ease;
  width: 0%;
}

.checklist-progress__text {
  display: block;
  margin-block-start: var(--space-xs);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* ===== Calculator ===== */
.calculator-form fieldset {
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--space-lg);
  margin-block-end: var(--space-lg);
}

.calculator-form legend {
  font-weight: 600;
  font-size: var(--font-size-lg);
  padding: 0 var(--space-sm);
}

.calculator-form label {
  display: block;
  font-weight: 600;
  margin-block: var(--space-sm) var(--space-xs);
}

.calculator-form input:not([type='checkbox']):not([type='radio']),
.calculator-form select {
  width: 100%;
  padding: var(--space-md);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  font-size: var(--font-size-base);
  background: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-family);
  transition: all var(--transition-fast);
}

.calculator-form input:focus,
.calculator-form select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.15);
}

.calculator-form .hint {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-block-start: var(--space-xs);
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-block-start: var(--space-lg);
  font-weight: var(--font-weight-normal);
  cursor: pointer;
  line-height: var(--line-height-base);
}

.checkbox-label input[type='checkbox'] {
  width: 1.15rem;
  height: 1.15rem;
  margin: 0.15rem 0 0;
  flex: none;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.calculator-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-block-start: var(--space-lg);
}

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

.calculator-card--highlight {
  border-color: var(--color-primary);
  text-align: center;
}

.calculator-savings {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
}

.calculator-card dl {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-xs) var(--space-md);
}

.calculator-card dd {
  text-align: end;
  margin: 0;
}

/* ===== Code Blocks ===== */
pre {
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  border: 1px solid #334155;
  border-radius: var(--border-radius);
  padding: var(--space-lg);
  overflow-x: auto;
  font-size: var(--font-size-sm);
  line-height: 1.7;
  color: #e2e8f0;
  position: relative;
}

pre::before {
  content: '⋯';
  position: absolute;
  top: var(--space-xs);
  inset-inline-end: var(--space-md);
  color: #475569;
  font-size: var(--font-size-sm);
  letter-spacing: 2px;
}

code {
  font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  font-size: 0.9em;
}

:not(pre) > code {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  padding: 0.2em 0.5em;
  border-radius: 4px;
  font-weight: 500;
}

/* ===== Comparison Table ===== */
.comparison-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin-block: var(--space-lg);
  font-size: var(--font-size-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  overflow: hidden;
  table-layout: auto;
}

.comparison-table th,
.comparison-table td {
  padding: var(--space-md) var(--space-lg);
  border: none;
  border-block-end: 1px solid var(--color-border);
  text-align: start;
}

.comparison-table th {
  background: linear-gradient(135deg, #1e40af 0%, #2563eb 100%);
  color: #fff;
  font-weight: 600;
  font-size: var(--font-size-sm);
  position: sticky;
  top: var(--navbar-height);
  z-index: 1;
  border-inline-end: 1px solid rgba(255, 255, 255, 0.25);
}

.comparison-table th:last-child {
  border-inline-end: none;
}

.comparison-table tr:last-child td {
  border-block-end: none;
}

.comparison-table tr:nth-child(even) {
  background: var(--color-bg);
}

.comparison-table tr:hover {
  background: color-mix(in srgb, var(--page-accent) 8%, var(--color-surface));
}

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

.comparison-table td:first-child,
.quick-ref td:first-child {
  font-weight: var(--font-weight-semibold);
  width: 34%;
}

.comparison-table td:last-child,
.quick-ref td:last-child {
  text-align: end;
  font-variant-numeric: tabular-nums;
}

/* ===== Quick Reference Table ===== */
.quick-ref {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin-block: var(--space-lg);
  font-size: var(--font-size-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  overflow: hidden;
  table-layout: auto;
}

.quick-ref th,
.quick-ref td {
  padding: var(--space-md) var(--space-lg);
  border: none;
  border-block-end: 1px solid var(--color-border);
  text-align: start;
}

.quick-ref th {
  background: var(--color-bg);
  font-weight: 600;
  position: sticky;
  top: var(--navbar-height);
  z-index: 1;
  border-inline-end: 1px solid var(--color-border);
}

.quick-ref th:last-child {
  border-inline-end: none;
}

.quick-ref tr:last-child td {
  border-block-end: none;
}

.quick-ref tr {
  transition: background var(--transition-fast);
}

.quick-ref tr:hover {
  background: color-mix(in srgb, var(--page-accent) 8%, var(--color-surface));
}

.quick-ref code {
  font-size: 0.85em;
}

/* ===== Glossary ===== */
.glossary-controls {
  margin-block: var(--space-lg);
}

.glossary-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-block-start: var(--space-md);
}

.glossary-pill {
  padding: 0.35rem 0.9rem;
  border-radius: 9999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  transition: all var(--transition-base);
}

.glossary-pill:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.glossary-pill--active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

[data-theme='dark'] .glossary-pill--active {
  background: #2563eb;
  color: #fff;
  border-color: #2563eb;
}

.glossary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-block-start: var(--space-lg);
}

.glossary-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-lg);
  transition: box-shadow var(--transition-base);
}

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

.glossary-card__header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-block-end: var(--space-xs);
}

.glossary-card__icon {
  font-size: 1.5rem;
  line-height: 1;
}

.glossary-card__term {
  font-size: var(--font-size-lg);
  margin: 0;
  border: none;
  padding: 0;
}

.glossary-card__def {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin-block: var(--space-sm) 0;
}

.glossary-card__links {
  border-top: 1px solid var(--color-border);
  margin-block-start: var(--space-md);
  padding-block-start: var(--space-sm);
  font-size: var(--font-size-xs);
}

.glossary-card__links-label {
  color: var(--color-text-muted);
  margin-inline-end: var(--space-xs);
}

.glossary-no-results {
  text-align: center;
  color: var(--color-text-muted);
  padding: var(--space-xl);
  font-size: var(--font-size-sm);
}

@media (max-width: 480px) {
  .glossary-grid {
    grid-template-columns: 1fr;
  }
}