/* Industry — the design-system tokens the landing page is built from.
   Ported from the styles.css in the Claude Design project's _ds directory;
   only the parts this page actually uses are kept, so the microsite CSS
   budget stays small. Retune here, never in the page. */

:root {
  /* The page is light by design, with dark bands as a deliberate alternation —
     not a theme. Without this, Chrome's auto-dark-theme inverts the whole thing
     and the bands stop reading as bands (seen 2026-08-21). */
  color-scheme: light;

  --color-bg: #f2f2f3;
  --color-surface: #e9e9ea;
  --color-text: #1d1f20;
  --color-accent: #5980a6;
  /* The filled-button blue only. #5980a6 behind #f2f2f3 text is 3.71:1 and
     fails WCAG AA for normal text; this is the nearest shade that clears 4.5
     (4.71) without shifting the palette everywhere else. */
  --color-accent-cta: #4a6f93;
  --color-divider: color-mix(in srgb, #1d1f20 16%, transparent);

  /* Tonal ramps — generated in OKLCH on one shared lightness scale, so the
     same step of any role matches the others in visual value. */
  --color-neutral-100: #f5f5f8;
  --color-neutral-200: #e7e7ea;
  --color-neutral-300: #d4d4d7;
  --color-neutral-800: #424244;

  --color-accent-100: #eef6ff;
  --color-accent-200: #d6ebff;
  --color-accent-300: #b5d9fd;
  --color-accent-400: #94bce3;
  --color-accent-600: #597ea3;
  --color-accent-700: #416180;
  --color-accent-800: #2c455d;
  --color-accent-900: #1d2d3d;

  --font-heading: "Barlow Condensed", system-ui, sans-serif;
  --font-heading-weight: 600;
  --font-body: "Barlow", system-ui, sans-serif;

  --space-1: 3.4px;
  --space-2: 6.8px;
  --space-3: 10.2px;
  --space-4: 13.6px;

  --radius-md: 4px;

  /* Fluid type: the design is drawn at 1180px; these keep its proportions
     while letting the page down to 320 without a horizontal scrollbar. */
  --text-hero: clamp(2.75rem, 1.2rem + 6.6vw, 5.25rem);
  --text-h2: clamp(2rem, 1.4rem + 2.4vw, 2.875rem);
  --text-pull: clamp(1.5rem, 1.1rem + 1.7vw, 2.375rem);
  --text-lead: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);

  --sec-pad: clamp(3.5rem, 2.2rem + 5vw, 6rem);
  --wrap: 1100px;
  --wrap-gutter: clamp(1.25rem, 0.5rem + 3vw, 2.5rem);
}

/* The dark bands. Scoped rather than a media query: these sections are dark
   by design in both themes — the page is deliberately light-first. */
.dark {
  --color-bg: #1d2d3d;
  --color-surface: #2c455d;
  --color-text: #f5f5f8;
  --color-divider: rgba(245, 245, 248, 0.22);
  --color-accent: #94bce3;
  --color-accent-100: rgba(148, 188, 227, 0.14);
  --color-accent-300: #416180;
  --color-accent-700: #b5d9fd;
  --color-accent-800: #d6ebff;
  --color-accent-900: #eef6ff;
  --color-neutral-200: rgba(245, 245, 248, 0.12);
  --color-neutral-300: rgba(245, 245, 248, 0.25);

  background: #1d2d3d;
  color: #f5f5f8;
}

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

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.55;
  text-wrap: pretty;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3 {
  font-family: var(--font-heading);
  font-weight: var(--font-heading-weight);
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 0;
}

p {
  margin: 0;
}

a {
  color: var(--color-accent-700);
  text-decoration: none;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--color-accent-800);
  text-decoration: underline;
}

.dark a {
  color: var(--color-accent-700);
}

.dark a:hover {
  color: var(--color-accent-800);
}

:focus {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

::selection {
  background: color-mix(in srgb, var(--color-accent) 30%, transparent);
}

/* Reachable by a screen reader, invisible on screen — the form labels. */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* — the blueprint frame: components are wireframe objects — square,
     transparent, hairline-bordered, with registration marks at the corners — */
.blueprint {
  position: relative;
  border: 1px solid var(--color-divider);
  border-radius: 0;
}

.blueprint > .corner {
  position: absolute;
  width: 11px;
  height: 11px;
  color: color-mix(in srgb, var(--color-text) 55%, transparent);
}

.blueprint > .corner::before,
.blueprint > .corner::after {
  content: "";
  position: absolute;
  background: currentColor;
}

.blueprint > .corner::before {
  left: 5px;
  top: 0;
  width: 1px;
  height: 100%;
}

.blueprint > .corner::after {
  top: 5px;
  left: 0;
  width: 100%;
  height: 1px;
}

.blueprint > .corner.tl { top: -6px; left: -6px; }
.blueprint > .corner.tr { top: -6px; right: -6px; }
.blueprint > .corner.bl { bottom: -6px; left: -6px; }
.blueprint > .corner.br { bottom: -6px; right: -6px; }

/* — buttons — */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  text-decoration: none;
  font-family: var(--font-heading);
  font-weight: var(--font-heading-weight);
  font-size: 14px;
  line-height: 1.2;
  color: var(--color-text);
  background: transparent;
  border: 1px solid var(--color-divider);
  border-radius: 0;
  padding: var(--space-2) calc(var(--space-3) * 1.2);
  transition: background-color 150ms cubic-bezier(0.16, 1, 0.3, 1);
}

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

.btn-primary {
  background: var(--color-accent-cta, var(--color-accent));
  color: #fff;
  border-color: var(--color-accent-cta, var(--color-accent));
}

.btn-primary:hover {
  /* accent-600 behind white is 4.25:1 — still short, so hover goes darker,
     which is the right direction for a filled button anyway. */
  background: var(--color-accent-700);
  color: #fff;
}

.btn-primary:active {
  background: var(--color-accent-800);
}

.dark .btn-primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #1d2d3d;
}

/* — forms — */
.input {
  width: 100%;
  min-height: 36px;
  padding: 6px 10px;
  font: inherit;
  font-size: 14px;
  color: var(--color-text);
  caret-color: var(--color-accent);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: 0;
}

.input:hover {
  border-color: color-mix(in srgb, var(--color-text) 45%, transparent);
}

.input:focus-visible {
  border-color: var(--color-accent);
  outline-offset: 0;
}

/* — tags — */
.tag {
  display: inline-flex;
  align-items: center;
  font-size: 11px;
  letter-spacing: 0.02em;
  padding: 3px 10px;
  border-radius: 0;
}

.tag-accent {
  background: var(--color-accent-100);
  color: var(--color-accent-800);
}

.tag-neutral {
  background: var(--color-neutral-100);
  color: var(--color-neutral-800);
}

.dark .tag-neutral {
  background: var(--color-neutral-200);
  color: var(--color-text);
}

.tag-outline {
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
}

@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;
  }
}