/* ==========================================================================
   Base: reset, typography, global utilities
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1 0 auto;
}

main:focus {
  outline: none;
}

h1,
h2,
h3,
h4 {
  margin: 0 0 var(--space-3);
  font-weight: 700;
  line-height: var(--leading-snug);
  letter-spacing: var(--tracking-tight);
  overflow-wrap: anywhere;
  hyphens: auto;
}

h1 {
  font-size: var(--text-2xl);
  line-height: var(--leading-tight);
}
h2 {
  font-size: var(--text-xl);
}
h3 {
  font-size: var(--text-lg);
}
h4 {
  font-size: var(--text-md);
}

p {
  margin: 0 0 var(--space-4);
  overflow-wrap: anywhere;
}
p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--color-accent-text);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
  transition: color var(--dur-fast) ease;
}
a:hover {
  color: var(--color-accent-hover);
}

ul,
ol {
  margin: 0 0 var(--space-4);
  padding-left: 1.25rem;
}

img,
svg,
video {
  max-width: 100%;
  height: auto;
  display: block;
}

svg {
  flex-shrink: 0;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
}

dl {
  margin: 0;
}
dd {
  margin: 0;
}

code,
kbd {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--color-surface-2);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

hr {
  border: 0;
  border-top: 1px solid var(--color-border);
  margin: var(--space-6) 0;
}

::selection {
  background: var(--color-accent);
  color: #fff;
}

/* Focus: always visible, never removed */
:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: 4px;
}

/* Utilities */
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 100;
  padding: var(--space-2) var(--space-4);
  background: var(--color-brand);
  color: var(--color-on-brand);
  border-radius: var(--radius-sm);
  font-weight: 600;
}
.skip-link:focus {
  top: var(--space-3);
  color: var(--color-on-brand);
}

.eyebrow {
  margin: 0 0 var(--space-3);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-accent-text);
}
.eyebrow--on-dark {
  color: var(--color-accent);
}

.lead {
  font-size: var(--text-md);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
}

.muted {
  color: var(--color-text-muted);
}

.mono {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

.link-arrow,
.link-plain {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-weight: 600;
  text-decoration: none;
}
.link-arrow svg {
  transition: transform var(--dur-fast) var(--ease-out);
}
.link-arrow:hover svg {
  transform: translateX(3px);
}
.link-plain {
  color: var(--color-text-muted);
}
.link-plain:hover {
  color: var(--color-text);
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--color-text-muted);
}
.status::before {
  flex-shrink: 0;
  content: '';
  width: 0.5em;
  height: 0.5em;
  border-radius: 50%;
  background: currentColor;
}
.status--live {
  color: var(--color-success);
}
.status--inDevelopment {
  color: var(--color-warning);
}
.status--validation {
  color: var(--accent-navy);
}

.tag-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.tag-list li {
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-text-muted);
  background: var(--color-surface);
  white-space: nowrap;
}
.tag-list--plain li {
  background: transparent;
  border-color: var(--color-border-strong);
}

/* Small utilities used instead of inline styles (CSP forbids style attributes) */
.text-xs {
  font-size: var(--text-xs);
}
.text-sm {
  font-size: var(--text-sm);
}
.mt-2 {
  margin-top: var(--space-2);
}
.mt-3 {
  margin-top: var(--space-3);
}
.subheading {
  font-size: var(--text-lg);
}
.subheading--spaced {
  margin-top: var(--space-8);
}
.spacer-7 {
  height: var(--space-7);
}
.spacer-section {
  height: var(--section-y);
}
.icon-flip {
  display: inline-flex;
  transform: scaleX(-1);
}
.link-arrow--back {
  flex-direction: row-reverse;
}
.link-arrow--back:hover svg {
  transform: translateX(-3px);
}

/* Reveal on scroll: opt-in, subtle, disabled when reduced motion is preferred */
[data-reveal-group] > * {
  opacity: 1;
  transform: none;
}
.js [data-reveal-group] > * {
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity 480ms var(--ease-out),
    transform 480ms var(--ease-out);
}
.js [data-reveal-group] > .is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .js [data-reveal-group] > * {
    opacity: 1;
    transform: none;
  }
}