globals.css

@import 'tailwindcss';

:root {
  /* Surface and layout colors */
  --color-surface: #f7f7f5;
  --color-panel: #ffffff;
  --color-panel-solid: #ffffff;
  --color-panel-muted: #f1f3f5;
  --color-panel-contrast: #ffffff;
  --color-header-bg: rgba(255, 255, 255, 0.9);

  /* Typography and interactive colors */
  --color-ink: #111827;
  --color-muted: #374151;
  --color-line: #9ca3af;
  --color-accent: #0f766e;
  --focus-ring-color: rgba(15, 118, 110, 0.45);
  --focus-ring-width: 2px;
  --focus-ring-offset: 2px;
  --shadow-soft: 0 16px 40px rgba(17, 24, 39, 0.06);
  --duration-fast: 150ms;
  --duration-base: 250ms;
  --duration-slow: 400ms;
  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);
}


@theme inline {
  --color-background: var(--color-surface);
  --color-foreground: var(--color-ink);
  --color-status-success: var(--color-success);
  --color-status-success-soft: var(--color-success-soft);
  --color-status-warning: var(--color-warning);
  --color-status-warning-soft: var(--color-warning-soft);
  --color-status-danger: var(--color-danger);
  --color-status-danger-soft: var(--color-danger-soft);
  --color-status-info: var(--color-info);
  --color-status-info-soft: var(--color-info-soft);
  --font-sans: var(--font-space-grotesk);
  --font-mono: var(--font-ibm-plex-mono);

  /* Typography Scale Tokens */
  --text-display: 3rem;
  --text-h1: 2.25rem;
  --text-h2: 1.875rem;
  --text-h3: 1.5rem;
  --text-h4: 1.25rem;
  --text-body-lg: 1.125rem;
  --text-body: 1rem;
  --text-body-sm: 0.875rem;
  --text-caption: 0.75rem;
  --text-eyebrow: 0.78rem;

  --leading-display: 1.1;
  --leading-heading: 1.2;
  --leading-body: 1.6;
  --leading-tight: 1.3;

  --tracking-display: -0.025em;
  --tracking-heading: -0.02em;
  --tracking-eyebrow: 0.16em;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--color-surface);
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  color: var(--color-ink);
  font-family: var(--font-space-grotesk), sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

:where(a, button, [role="button"], input, select, textarea, summary):focus {
  outline: none;
}

:where(a, button, [role="button"], input, select, textarea, summary):focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 3px;
}

::selection {
  background: rgba(15, 118, 110, 0.18);
}

:focus-visible {
  outline: var(--focus-ring-width) solid var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
  border-radius: 2px;
}

.surface {
  border: 1px solid var(--color-line);
  background: var(--color-panel);
  box-shadow: var(--shadow-soft);
}

/* Typography utility classes backed by tokens */
.text-display {
  font-size: var(--text-display);
  line-height: var(--leading-display);
  letter-spacing: var(--tracking-display);
  font-weight: 700;
}

.text-h1 {
  font-size: var(--text-h1);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  font-weight: 600;
}

.text-h2 {
  font-size: var(--text-h2);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  font-weight: 600;
}

.text-h3 {
  font-size: var(--text-h3);
  line-height: var(--leading-heading);
  font-weight: 600;
}

.text-h4 {
  font-size: var(--text-h4);
  line-height: var(--leading-heading);
  font-weight: 600;
}

.text-body-lg {
  font-size: var(--text-body-lg);
  line-height: var(--leading-body);
}

.text-body {
  font-size: var(--text-body);
  line-height: var(--leading-body);
}

.text-body-sm {
  font-size: var(--text-body-sm);
  line-height: var(--leading-body);
}

.text-caption {
  font-size: var(--text-caption);
  line-height: var(--leading-body);
}

.eyebrow {
  font-family: var(--font-ibm-plex-mono), monospace;
  font-size: var(--text-eyebrow);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  line-height: var(--leading-tight);
}

/* Focus is the one state a keyboard user has. The scaffold styled :hover only,
   which leaves tab navigation invisible — so every interactive control gets a
   ring here rather than each component remembering to add one.

   :focus-visible, not :focus, so a mouse click does not leave a ring behind.
   The 2px offset keeps the ring off the control's own border, which matters on
   the pill links where the border is the only edge. */
:where(a, button, input, select, textarea, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: inherit;
}

/* Skip link: visually hidden until focused, then pinned to the top-left. Gives
   keyboard and screen-reader users a way past the header nav on every page,
   which is WCAG 2.4.1 (Bypass Blocks). */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
}

.skip-link:focus-visible {
  left: 0.5rem;
  top: 0.5rem;
  padding: 0.75rem 1rem;
  border-radius: 0.75rem;
  background: var(--color-ink);
  color: #fff;
}

/* A programmatically focused landmark should not also draw a ring — the point
   of focusing it is to move the reading position, not to highlight a control. */
main:focus {
  outline: none;
}