/* Kunely — tokens from the Vellum Design System (src/shared/theme/colors.ts).
   Reading Chair (light) and Butaca (dark). No greys anywhere: muted text and
   borders are low-opacity tints of the palette's own ink or blush. */

:root {
  --linen: #f6ede8;
  --linen-surface: #fff8f4;
  --ink: #402a2a;
  --terracotta: #b4553f;
  --olive: #7c8b56;
  --amber: #b07a2b;

  color-scheme: light;
  --bg: var(--linen);
  --surface: var(--linen-surface);
  --text: var(--ink);
  --text-secondary: rgba(64, 42, 42, 0.68);
  --text-muted: rgba(64, 42, 42, 0.45);
  --border: rgba(64, 42, 42, 0.1);
  --accent: var(--terracotta);
  --brand-light-display: block;
  --brand-dark-display: none;
  --shadow: 0 10px 30px rgba(64, 42, 42, 0.08);
  --scroll-thumb: rgba(64, 42, 42, 0.22);
  --scroll-thumb-hover: rgba(180, 85, 63, 0.55);

  --max: 68rem;
  --step: clamp(1rem, 0.6rem + 1.6vw, 1.75rem);
}

/* Butaca (dark) is declared twice on purpose. The media query is what keeps
   dark mode working when JavaScript is off or blocked; the attribute is what
   the in-page switch sets. The :not() is what lets a reader force light on a
   system that asks for dark. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    color-scheme: dark;
    --bg: #1e1516;
    --surface: #2a1e1f;
    --text: #f2e2dc;
    --text-secondary: rgba(242, 226, 220, 0.7);
    --text-muted: rgba(242, 226, 220, 0.45);
    --border: rgba(242, 226, 220, 0.12);
    --accent: #d2705a;
    --brand-light-display: none;
    --brand-dark-display: block;
    --olive: #9baf72;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    --scroll-thumb: rgba(242, 226, 220, 0.2);
    --scroll-thumb-hover: rgba(210, 112, 90, 0.65);
  }
}

:root[data-theme='dark'] {
  color-scheme: dark;
  --bg: #1e1516;
  --surface: #2a1e1f;
  --text: #f2e2dc;
  --text-secondary: rgba(242, 226, 220, 0.7);
  --text-muted: rgba(242, 226, 220, 0.45);
  --border: rgba(242, 226, 220, 0.12);
  --accent: #d2705a;
  --brand-light-display: none;
  --brand-dark-display: block;
  --olive: #9baf72;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --scroll-thumb: rgba(242, 226, 220, 0.2);
  --scroll-thumb-hover: rgba(210, 112, 90, 0.65);
}

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

html {
  scroll-behavior: smooth;
  /* Firefox, and Chromium since 121. WebKit still needs the block below. */
  scrollbar-color: var(--scroll-thumb) var(--bg);
  scrollbar-width: thin;
}

::-webkit-scrollbar {
  width: 11px;
  height: 11px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--scroll-thumb);
  border-radius: 999px;
  /* A transparent border with a background clip is what keeps the thumb from
     touching the track edges; padding does not apply to a scrollbar part. */
  border: 3px solid transparent;
  background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--scroll-thumb-hover);
  background-clip: padding-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

/* Horizontal only. `section` owns the vertical rhythm, and an element carrying
   both selectors must not have the class clobber it on specificity. */
.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding-inline: var(--step);
}

/* Navigation ------------------------------------------------------------- */

nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.85rem var(--step);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
}

.nav-brand img.mark {
  width: 30px;
  height: 30px;
}

.nav-brand img.wordmark {
  height: 15px;
  width: auto;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Both colour variants of every brand asset ship, and CSS shows one. A
   <picture> media query cannot do this job: it only ever reads the OS setting
   and would ignore the in-page switch. A CSS mask could, but Chrome treats an
   external mask as cross-origin and drops it over file://, which is a
   documented way to open this page. */
.brand-light {
  display: var(--brand-light-display);
}

.brand-dark {
  display: var(--brand-dark-display);
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: transparent;
  color: var(--text-secondary);
  font: inherit;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  color: var(--accent);
  border-color: var(--accent);
}

/* Hero ------------------------------------------------------------------- */

.hero {
  text-align: center;
  padding: clamp(3.5rem, 9vw, 7rem) var(--step) clamp(2.5rem, 6vw, 4.5rem);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: clamp(2rem, 6vw, 4rem);
  left: 50%;
  width: min(420px, 78vw);
  aspect-ratio: 1;
  transform: translateX(-50%);
  background: radial-gradient(
    circle,
    color-mix(in srgb, var(--accent) 16%, transparent) 0%,
    transparent 68%
  );
  pointer-events: none;
}

.hero-mark {
  width: clamp(96px, 18vw, 136px);
  height: auto;
  margin: 0 auto 1.5rem;
  position: relative;
}

.hero-wordmark {
  width: clamp(180px, 34vw, 260px);
  height: auto;
  margin: 0 auto 1.25rem;
  position: relative;
}

.tagline {
  font-size: clamp(1.25rem, 1rem + 1.4vw, 1.9rem);
  font-weight: 600;
  line-height: 1.3;
  margin: 0 auto 1rem;
  max-width: 22ch;
  position: relative;
}

.hero-lede {
  color: var(--text-secondary);
  max-width: 46ch;
  margin: 0 auto 2rem;
  position: relative;
}

.hairline {
  width: 72px;
  height: 2px;
  border-radius: 1px;
  background: var(--accent);
  margin: 0 auto;
  position: relative;
}

/* Sections --------------------------------------------------------------- */

section {
  padding-block: clamp(2.75rem, 7vw, 5rem);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  margin: 0 0 0.65rem;
}

h2 {
  font-size: clamp(1.4rem, 1.1rem + 1.1vw, 2rem);
  line-height: 1.25;
  margin: 0 0 1.75rem;
  font-weight: 600;
}

h3 {
  font-size: 1.08rem;
  margin: 0 0 0.5rem;
  font-weight: 600;
}

.cards {
  display: grid;
  gap: 1.1rem;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.6rem 1.4rem;
  box-shadow: var(--shadow);
}

.card p {
  color: var(--text-secondary);
  margin: 0;
  font-size: 0.97rem;
}

.card .icon {
  color: var(--accent);
  font-size: 1.2rem;
  margin-bottom: 0.85rem;
  display: block;
}

/* The one rule ----------------------------------------------------------- */

.rule {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 14px;
  padding: clamp(1.6rem, 4vw, 2.4rem);
}

.rule p {
  margin: 0 0 1rem;
  font-size: 1.05rem;
}

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

.rule strong {
  color: var(--accent);
}

/* Status ----------------------------------------------------------------- */

.facts {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  display: grid;
  gap: 0.6rem;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
}

.facts li {
  border-top: 1px solid var(--border);
  padding-top: 0.8rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.facts strong {
  display: block;
  color: var(--text);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.25rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.8rem 1.4rem;
  border-radius: 999px;
  background: var(--accent);
  color: var(--linen);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: opacity 0.2s, transform 0.2s;
}

.cta-button:hover,
.cta-button:focus-visible {
  opacity: 0.9;
  transform: translateY(-1px);
}

.cta-button.ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.cta-button.ghost:hover,
.cta-button.ghost:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

/* Footer ----------------------------------------------------------------- */

footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0 3rem;
  color: var(--text-muted);
  font-size: 0.87rem;
}

footer a {
  color: var(--text-secondary);
  text-decoration: none;
}

footer a:hover,
footer a:focus-visible {
  color: var(--accent);
}

/* Respect the reader's motion preference — the same rule the app follows. */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}