/**
 * Site styles. All values come from the design tokens in docs/design/tokens/,
 * served as /css/tokens.css. No literal design values belong in this file.
 */

/* Fonts: self-hosted, no third-party requests. See docs/design/03-typography.md */

@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 100 700;
  font-display: swap;
  src: url("/fonts/ibm-plex-sans-latin-wght-normal.woff2") format("woff2");
}

@font-face {
  font-family: "JetBrains Mono";
  font-style: normal;
  font-weight: 100 800;
  font-display: swap;
  src: url("/fonts/jetbrains-mono-latin-wght-normal.woff2") format("woff2");
}

/* Base */

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

body {
  margin: 0;
  font: var(--type-body-01);
  color: var(--text-primary);
  background: var(--background);
}

html.custom-scrollbar,
html.custom-scrollbar body {
  scrollbar-width: none;
}

html.custom-scrollbar::-webkit-scrollbar,
html.custom-scrollbar body::-webkit-scrollbar {
  display: none;
}

code,
kbd,
samp,
pre {
  font-family: var(--font-family-mono);
}

:focus-visible {
  outline: var(--border-width-focus) solid var(--focus);
  outline-offset: var(--spacing-01);
}

.container {
  width: min(
    var(--content-max-width),
    calc(100% - 2 * var(--grid-margin-md))
  );
  margin-inline: auto;
}

/* Skip link: first focusable element, visible only when focused */

.skip-link {
  position: absolute;
  z-index: 1;
  margin: var(--spacing-03);
  padding: var(--spacing-03) var(--spacing-05);
  border: var(--border-width-focus) solid var(--focus);
  border-radius: var(--radius-sm);
  background: var(--background);
  color: var(--link);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
}

.skip-link:not(:focus) {
  clip-path: inset(50%);
  block-size: 1px;
  inline-size: 1px;
  overflow: hidden;
  white-space: nowrap;
}

/* Header */

.site-header {
  position: sticky;
  z-index: var(--z-index-site-header);
  inset-block-start: 0;
  border-block-end: var(--border-width) solid var(--border-subtle);
  background: var(--background);
}

.site-header .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-03) var(--spacing-05);
  padding-block: var(--spacing-03);
}

.site-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-03);
  min-height: var(--size-6x);
  color: var(--brand-mark);
  font-family: var(--font-family-display);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
}

.site-logo-mark {
  width: var(--size-6x);
  height: var(--size-6x);
  flex-shrink: 0;
  color: var(--brand-mark);
}

.header-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: var(--spacing-03);
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0 var(--spacing-02);
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-list a {
  display: inline-flex;
  align-items: center;
  min-height: var(--size-6x);
  padding-inline: var(--spacing-03);
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--duration-fast-02) var(--ease-standard);
}

.nav-list a:hover,
.nav-list a[aria-current="page"] {
  color: var(--text-primary);
}

/* Content */

main {
  padding-block: var(--spacing-09) var(--spacing-10);
}

main a:not(.button):not(.button-secondary) {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: var(--spacing-01);
}

main a:not(.button):not(.button-secondary):hover {
  color: var(--link-hover);
  text-decoration-thickness: var(--border-width-focus);
}

.hero {
  max-width: var(--measure-display);
}

.hero h1 {
  margin-block: 0 var(--spacing-05);
  font: var(--type-heading-expressive-02);
  font-size: clamp(var(--type-scale-08), 5vw, var(--type-scale-11));
}

.lead {
  margin-block: 0 var(--spacing-06);
  font-size: var(--type-scale-04);
  color: var(--text-secondary);
}

.section {
  margin-block-start: var(--spacing-10);
}

.section h2 {
  margin-block: 0 var(--spacing-05);
  font: var(--type-heading-02);
  font-size: clamp(var(--type-scale-06), 2.5vw, var(--type-scale-07));
}

.section h3 {
  margin-block: var(--spacing-07) var(--spacing-03);
  font-family: var(--font-family-display);
  font-size: var(--type-scale-05);
  font-weight: var(--font-weight-semibold);
}

.prose {
  max-width: var(--measure-prose);
}

.section p {
  margin-block: 0 var(--spacing-05);
}

.section ul {
  max-width: var(--measure-prose);
  margin-block: 0 var(--spacing-05);
  padding-inline-start: var(--spacing-06);
}

.section li {
  margin-block-end: var(--spacing-02);
}

.symptom-list {
  font-size: var(--type-scale-04);
}

.steps {
  max-width: var(--measure-prose);
  margin: 0;
}

.steps dt {
  margin-block-start: var(--spacing-06);
  font-weight: var(--font-weight-semibold);
}

.steps dt:first-of-type {
  margin-block-start: 0;
}

.steps dd {
  margin: var(--spacing-02) 0 0;
  color: var(--text-secondary);
}

.meta {
  margin-block: 0 var(--spacing-07);
  font-size: var(--type-scale-02);
  color: var(--text-secondary);
}

/* Calls to action */

.cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-04);
  margin-block: 0;
}

.button,
.button-secondary {
  display: inline-flex;
  align-items: center;
  min-height: var(--size-6x);
  padding: var(--spacing-04) var(--spacing-06);
  border: var(--border-width) solid transparent;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: inherit;
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
  transition:
    background var(--duration-fast-02) var(--ease-standard),
    border-color var(--duration-fast-02) var(--ease-standard);
}

.button {
  background: var(--interactive);
  color: var(--text-on-color);
}

.button:hover {
  background: var(--interactive-hover);
}

.button-secondary {
  border-color: var(--border-strong);
  color: var(--text-primary);
}

.button-secondary:hover {
  border-color: var(--interactive);
  background: var(--background-hover);
}

.login-button,
.login-button:hover {
  min-height: var(--spacing-08);
  padding-block: var(--spacing-02);
  border-color: var(--border-subtle);
  background: var(--background);
  color: var(--text-disabled);
  cursor: not-allowed;
}

.cta-pending {
  visibility: hidden;
}

.cta-ready {
  visibility: visible;
}

/* Footer */

.site-footer {
  margin-block-start: var(--spacing-10);
  border-block-start: var(--border-width) solid var(--border-subtle);
  padding-block: var(--spacing-06) var(--spacing-07);
  font-size: var(--type-scale-02);
  color: var(--text-secondary);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0 var(--spacing-06);
  margin: 0 0 var(--spacing-03);
  padding: 0;
  list-style: none;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: var(--size-6x);
  color: var(--text-secondary);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--text-primary);
  text-decoration: underline;
}

.site-footer p {
  margin: 0;
}

/* Persistent document scrollbar */

.site-scrollbar {
  position: fixed;
  z-index: var(--z-index-scrollbar);
  inset-block-start: calc(var(--site-header-bottom, 0px) + var(--spacing-03));
  inset-block-end: calc(var(--site-footer-offset, 0px) + var(--spacing-03));
  inset-inline-end: var(--spacing-03);
  width: var(--scrollbar-width);
  overflow: hidden;
  border: var(--border-width) solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background: var(--layer-01);
  cursor: pointer;
  touch-action: none;
}

.site-scrollbar-thumb {
  position: absolute;
  inset-block-start: 0;
  inset-inline: 0;
  min-height: var(--scrollbar-min-thumb-size);
  border-radius: var(--radius-sm);
  background: var(--brand-terracotta-50);
  cursor: grab;
}

.site-scrollbar-thumb:hover {
  background: var(--brand-terracotta-60);
}

.site-scrollbar-thumb.is-dragging {
  background: var(--brand-terracotta-70);
  cursor: grabbing;
}

@media print {
  .site-scrollbar {
    display: none;
  }
}