:root {
  --font-sans:
    "IBM Plex Sans", "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont,
    sans-serif;
  --font-mono: "IBM Plex Mono", Consolas, "Liberation Mono", monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-md: 1rem;
  --text-lg: 1.25rem;
  --text-xl: clamp(1.8rem, 3vw, 2.65rem);
  --text-financial: clamp(1.8rem, 2.4vw, 2.6rem);

  --font-weight-label: 650;
  --font-weight-emphasis: 700;
  --font-weight-strong: 750;
  --tracking-brand: -0.02em;
  --tracking-mark: -0.08em;
  --tracking-display: -0.045em;
  --tracking-heading: -0.025em;
  --tracking-eyebrow: 0.11em;
  --transform-eyebrow: uppercase;
  --line-body: 1.5;
  --line-label: 1.25;
  --line-display: 1.08;
  --line-heading: 1.2;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;

  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-pill: 999px;

  --border-width: 1px;
  --sidebar-width: 17rem;
  --content-max-width: 76rem;
  --mobile-navigation-height: 6.75rem;
  --z-skip-link: 100;
  --z-mobile-navigation: 40;
  --z-navigation-panel: 50;
  --transition-fast: 150ms ease;
  --transition-normal: 220ms ease;

  --color-ink-950: #172126;
  --color-ink-800: #2c3a40;
  --color-ink-600: #5b6b72;
  --color-ink-400: #8c9aa0;
  --color-paper-25: #fbfcfc;
  --color-paper-100: #f2f5f5;
  --color-paper-200: #e6ecec;
  --color-paper-300: #d2dcdc;
  --color-teal-700: #0d5c63;
  --color-teal-300: #75c8c4;
  --color-teal-500: #16848a;
  --color-teal-100: #dff3f1;
  --color-amber-100: #fff1cc;
  --color-amber-700: #805d00;
  --color-red-100: #ffe5e2;
  --color-red-700: #a33b35;
  --color-night-950: #11191d;
  --color-night-900: #172328;
  --color-night-800: #213238;
  --color-night-700: #30454c;
  --color-mist-100: #e8f0f0;
  --color-mist-300: #b6c8ca;
  --color-mist-500: #8da5a8;
  --color-white: #ffffff;

  --shadow-card: 0 1rem 2.5rem rgb(31 55 60 / 0.08);
  --shadow-focus: 0 0 0 0.25rem rgb(22 132 138 / 0.22);
}

/* Tokens of the redesign (`--c-*`); legacy roles alias them so older surfaces follow. */
:root,
[data-theme="system"],
[data-theme="light"] {
  color-scheme: light;
  --c-canvas: #f3f5f5;
  --c-rail: #fbfcfc;
  --c-card: #ffffff;
  --c-muted: #e9eeee;
  --c-ink: #172126;
  --c-ink2: #5b6b72;
  --c-ink3: #7f8d93;
  --c-line: #d8e0e0;
  --c-line2: #c3cfcf;
  --c-accent: #0d5c63;
  --c-accent-soft: #dff3f1;
  --c-on-accent: #ffffff;
  --c-pos: #0f7a73;
  --c-neg: #a33b35;
  --c-neg-soft: #ffe5e2;
  --c-warn: #805d00;
  --c-warn-soft: #fff1cc;
  /* High impact of an economic announcement: burnt orange, never a loss. */
  --c-hi: #b4501e;
  --c-shadow: 0 1px 2px rgb(23 33 38 / 0.06), 0 8px 24px rgb(23 33 38 / 0.05);
  --c-shadow-pop: 0 12px 32px rgb(0 0 0 / 0.14);
  --c-scrim: rgb(23 33 38 / 0.45);
}

[data-theme="dark"] {
  color-scheme: dark;
  --c-canvas: #0f1619;
  --c-rail: #141d21;
  --c-card: #172328;
  --c-muted: #213238;
  --c-ink: #e8f0f0;
  --c-ink2: #b6c8ca;
  --c-ink3: #8da5a8;
  --c-line: #2a3b41;
  --c-line2: #3a4f56;
  --c-accent: #75c8c4;
  --c-accent-soft: #1e3338;
  --c-on-accent: #0f1619;
  --c-pos: #7fd3cd;
  --c-neg: #f0a59e;
  --c-neg-soft: #3a2426;
  --c-warn: #e6c76a;
  --c-warn-soft: #3a3320;
  --c-hi: #f0a067;
  --c-shadow: 0 1px 2px rgb(0 0 0 / 0.4);
  --c-shadow-pop: 0 12px 32px rgb(0 0 0 / 0.5);
  --c-scrim: rgb(0 0 0 / 0.6);
}

@media (prefers-color-scheme: dark) {
  [data-theme="system"] {
    color-scheme: dark;
    --c-canvas: #0f1619;
    --c-rail: #141d21;
    --c-card: #172328;
    --c-muted: #213238;
    --c-ink: #e8f0f0;
    --c-ink2: #b6c8ca;
    --c-ink3: #8da5a8;
    --c-line: #2a3b41;
    --c-line2: #3a4f56;
    --c-accent: #75c8c4;
    --c-accent-soft: #1e3338;
    --c-on-accent: #0f1619;
    --c-pos: #7fd3cd;
    --c-neg: #f0a59e;
    --c-neg-soft: #3a2426;
    --c-warn: #e6c76a;
    --c-warn-soft: #3a3320;
    --c-hi: #f0a067;
    --c-shadow: 0 1px 2px rgb(0 0 0 / 0.4);
    --c-shadow-pop: 0 12px 32px rgb(0 0 0 / 0.5);
    --c-scrim: rgb(0 0 0 / 0.6);
  }
}

:root,
[data-theme] {
  --surface-canvas: var(--c-canvas);
  --surface-rail: var(--c-rail);
  --surface-card: var(--c-card);
  --surface-muted: var(--c-muted);
  --text-primary: var(--c-ink);
  --text-secondary: var(--c-ink2);
  --text-informative: var(--c-ink2);
  --text-muted: var(--c-ink3);
  --border-subtle: var(--c-line);
  --border-strong: var(--c-ink3);
  --accent-primary: var(--c-accent);
  --accent-soft: var(--c-accent-soft);
  --auth-action-bg: var(--c-accent);
  --auth-action-text: var(--c-on-accent);
  --auth-link: var(--c-accent);
  --status-ready: var(--c-pos);
  --status-ready-surface: var(--c-accent-soft);
  --status-neutral: var(--c-ink2);
  --status-neutral-surface: var(--c-muted);
  --status-error: var(--c-neg);
  --status-error-surface: var(--c-neg-soft);
  --status-warning: var(--c-warn);
  --status-warning-surface: var(--c-warn-soft);
  --status-info: var(--c-accent);
  --status-info-surface: var(--c-accent-soft);
  --focus-ring: var(--color-teal-500);
  --shadow-card: var(--c-shadow);
}

/* Brand site layout; colours and type come from src/styles/tokens.css and theme.css. */
@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("/fonts/ibm-plex-sans-latin-400-normal.woff2") format("woff2");
}
@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("/fonts/ibm-plex-sans-latin-600-normal.woff2") format("woff2");
}
@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("/fonts/ibm-plex-sans-latin-700-normal.woff2") format("woff2");
}

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

body {
  margin: 0;
  background: var(--surface-canvas);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: var(--text-md);
  line-height: var(--line-body);
}

a {
  color: var(--accent-primary);
}

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

h1,
h2,
h3 {
  line-height: var(--line-heading);
  letter-spacing: var(--tracking-heading);
}

h1 {
  font-size: var(--text-xl);
  line-height: var(--line-display);
  letter-spacing: var(--tracking-display);
  margin: 0 0 var(--space-4);
}

.wrap {
  width: min(100% - 2 * var(--space-5), var(--content-max-width));
  margin-inline: auto;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -4rem;
  z-index: var(--z-skip-link);
  padding: var(--space-2) var(--space-4);
  background: var(--surface-card);
  border-radius: var(--radius-sm);
}

.skip-link:focus {
  top: var(--space-4);
}

main:focus {
  outline: none;
}

.site-header {
  background: var(--surface-rail);
  border-bottom: var(--border-width) solid var(--border-subtle);
}

.site-header__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-6);
  padding-block: var(--space-3);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-primary);
  font-weight: var(--font-weight-emphasis);
  font-size: var(--text-lg);
  letter-spacing: var(--tracking-brand);
  text-decoration: none;
  margin-right: auto;
}

.site-nav,
.site-languages {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-2);
}

.site-nav a,
.site-languages a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding-inline: var(--space-2);
  color: var(--text-primary);
  text-decoration: none;
  border-radius: var(--radius-sm);
}

.site-nav a:hover,
.site-languages a:hover,
.site-nav a[aria-current],
.site-languages a[aria-current] {
  background: var(--surface-muted);
}

.site-nav a[aria-current],
.site-languages a[aria-current] {
  font-weight: var(--font-weight-emphasis);
}

.hero,
.page-head {
  padding-block: var(--space-12) var(--space-8);
}

.hero h1 {
  max-width: 20ch;
}

.eyebrow {
  color: var(--accent-primary);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-label);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: var(--transform-eyebrow);
  margin: 0 0 var(--space-2);
}

.lead {
  max-width: 60ch;
  color: var(--text-secondary);
  font-size: var(--text-lg);
  margin: 0;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: var(--space-2) var(--space-5);
  border: 2px solid var(--auth-action-bg);
  border-radius: var(--radius-sm);
  background: var(--auth-action-bg);
  color: var(--auth-action-text);
  font-weight: var(--font-weight-label);
  text-decoration: none;
}

.button--ghost {
  background: transparent;
  color: var(--accent-primary);
}

.grid {
  display: grid;
  gap: var(--space-4);
  padding: 0;
  margin: 0;
  list-style: none;
}

@media (min-width: 48rem) {
  .grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card,
.plan,
.faq {
  background: var(--surface-card);
  border: var(--border-width) solid var(--border-subtle);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: var(--space-5);
}

.card h2,
.card h3 {
  font-size: var(--text-lg);
  margin: 0 0 var(--space-2);
}

.card p {
  margin: 0;
  color: var(--text-secondary);
}

section + section {
  margin-top: var(--space-10);
}

.band {
  padding: var(--space-8) var(--space-6);
  border-radius: var(--radius-lg);
  background: var(--accent-soft);
}

.checks {
  padding-left: var(--space-5);
}

.checks li + li {
  margin-top: var(--space-1);
}

.note {
  color: var(--text-secondary);
  margin-top: var(--space-4);
}

.closing {
  padding-bottom: var(--space-12);
}

.period {
  display: inline-flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  border: var(--border-width) solid var(--border-strong);
  border-radius: var(--radius-pill);
  padding: var(--space-1);
  margin: 0 0 var(--space-6);
}

.period legend {
  padding-inline: var(--space-2);
  font-weight: var(--font-weight-label);
}

.period input {
  position: absolute;
  opacity: 0;
}

.period label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 44px;
  padding-inline: var(--space-4);
  border-radius: var(--radius-pill);
  cursor: pointer;
}

.period input:checked + label {
  background: var(--auth-action-bg);
  color: var(--auth-action-text);
}

.period input:focus-visible + label {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
}

.offer {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-label);
}

.plans {
  display: grid;
  gap: var(--space-6) var(--space-4);
  padding: 0;
  margin: 0;
  list-style: none;
}

@media (min-width: 56rem) {
  .plans {
    grid-template-columns: repeat(3, 1fr);
    align-items: start;
  }
}

.plan {
  position: relative;
}

.plan h2 {
  margin: 0;
}

.plan .checks {
  margin: var(--space-5) 0 0;
}

.plan--featured {
  border: 2px solid var(--accent-primary);
}

/* Out of the flow so every card keeps its title and price at the same height. */
.plan__badge {
  position: absolute;
  top: 0;
  left: var(--space-5);
  transform: translateY(-50%);
  margin: 0;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  background: var(--accent-soft);
  color: var(--text-primary);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-label);
}

.price {
  margin: var(--space-4) 0 var(--space-3);
}

.price strong {
  font-size: var(--text-financial);
  font-variant-numeric: tabular-nums;
}

.price span {
  color: var(--text-secondary);
}

/* Yearly by default; the monthly radio swaps the visible prices and calls to action. */
[data-period="month"],
.pricing:has(#period-month:checked) [data-period="year"] {
  display: none;
}

.pricing:has(#period-month:checked) [data-period="month"] {
  display: block;
}

.faq + .faq {
  margin-top: var(--space-3);
}

.faq summary {
  min-height: 44px;
  cursor: pointer;
  font-weight: var(--font-weight-label);
}

.faq p {
  margin-bottom: 0;
  color: var(--text-secondary);
}

.site-footer {
  margin-top: var(--space-12);
  padding-block: var(--space-8);
  background: var(--surface-rail);
  border-top: var(--border-width) solid var(--border-subtle);
}

.site-footer__grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
}

.site-footer h2 {
  font-size: var(--text-md);
  margin: 0 0 var(--space-2);
}

.site-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-footer li a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

.site-footer__note {
  margin-top: var(--space-6);
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

/* Small screens: brand and languages share the first line, pages the second. */
@media (max-width: 40rem) {
  .site-header__inner {
    gap: 0 var(--space-2);
    padding-block: var(--space-2);
  }

  .site-languages {
    order: 1;
    gap: 0;
  }

  .site-nav {
    order: 2;
    flex-basis: 100%;
    flex-wrap: nowrap;
    gap: 0;
    margin-inline: calc(-1 * var(--space-2));
  }

  .site-nav a,
  .site-languages a {
    padding-inline: var(--space-2);
    font-size: var(--text-sm);
  }
}