:root {
  --color-bg: oklch(98% 0 0);
  --color-ink: oklch(18% 0 0);
  --color-muted: oklch(48% 0 0);
  --color-faint: oklch(82% 0 0);
  --color-accent: oklch(62% 0.20 35);
  --color-panel: oklch(99% 0 0);

  --serif: "Iowan Old Style", "Apple Garamond", "Baskerville", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Inter", "Helvetica Neue", Arial, sans-serif;

  --text-eyebrow: 0.78rem;
  --text-nav-trigger: 0.72rem;
  --text-lede: clamp(1rem, 0.94rem + 0.3vw, 1.125rem);
  --text-hero: clamp(4rem, 2rem + 8vw, 9rem);
  --text-nav-title: 1.25rem;

  --space-gap: clamp(1.5rem, 1rem + 1.5vw, 2.5rem);
  --space-edge: clamp(1.25rem, 1rem + 0.75vw, 2rem);

  --duration-normal: 320ms;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: var(--space-gap);
}

main {
  width: min(640px, 100%);
  display: grid;
  gap: clamp(3rem, 2rem + 4vw, 5rem);
}

.eyebrow {
  margin: 0;
  font-size: var(--text-eyebrow);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-muted);
}

h1 {
  margin: 0.5rem 0 1.25rem;
  font-family: var(--serif);
  font-size: var(--text-hero);
  font-weight: 400;
  line-height: 0.95;
  letter-spacing: -0.04em;
  color: var(--color-ink);
}

h1::first-letter {
  color: var(--color-accent);
}

.lede {
  margin: 0;
  font-size: var(--text-lede);
  line-height: 1.55;
  color: var(--color-muted);
  max-width: 32ch;
}

footer p {
  margin: 0;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  color: var(--color-muted);
}

/* ──────────────────────────────────────────────────────────────────
   Discrete top-left nav expander.
   Trigger = a small typographic mark + label, sits in page rhythm.
   Panel = slides in from the left, holds a vertical list of links.
   ────────────────────────────────────────────────────────────────── */

.navx {
  position: fixed;
  top: var(--space-edge);
  left: var(--space-edge);
  z-index: 10;
}

.navx__trigger {
  position: relative;
  z-index: 11; /* stays above the panel so it remains clickable when open */
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.35rem 0.5rem;
  margin: -0.35rem -0.5rem; /* preserve hit-area without visible padding */
  background: transparent;
  border: 0;
  border-radius: 4px;
  font-family: var(--sans);
  font-size: var(--text-nav-trigger);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-muted);
  cursor: pointer;
  transition:
    color var(--duration-normal) var(--ease-out-expo),
    background-color var(--duration-normal) var(--ease-out-expo);
}

.navx__trigger-mark {
  width: 18px;
  height: 1.5px;
  background: currentColor;
  border-radius: 999px;
  transition: width var(--duration-normal) var(--ease-out-expo);
}

.navx__trigger:hover,
.navx__trigger:focus-visible {
  color: var(--color-ink);
  outline: none;
}

.navx__trigger:hover .navx__trigger-mark,
.navx__trigger:focus-visible .navx__trigger-mark {
  width: 28px;
}

.navx__trigger[aria-expanded="true"] {
  color: var(--color-ink);
}

.navx__trigger[aria-expanded="true"] .navx__trigger-mark {
  width: 28px;
  background: var(--color-accent);
}

.navx__panel {
  position: fixed;
  top: 0;
  left: 0;
  height: 100dvh;
  width: min(360px, 86vw);
  padding: calc(var(--space-edge) + 2.5rem) var(--space-edge) var(--space-edge);
  background: var(--color-panel);
  border-right: 1px solid var(--color-faint);
  box-shadow: 12px 0 40px -20px oklch(0% 0 0 / 0.18);
  transform: translateX(-100%);
  transition: transform var(--duration-normal) var(--ease-out-expo);
  z-index: 9; /* behind trigger so it stays clickable */
}

.navx__panel.is-open {
  transform: translateX(0);
}

.navx__eyebrow {
  margin: 0 0 1.5rem;
  font-size: var(--text-eyebrow);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.navx__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.navx__list a {
  display: block;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--color-faint);
  color: var(--color-ink);
  text-decoration: none;
  transition: color var(--duration-normal) var(--ease-out-expo);
}

.navx__list li:last-child a {
  border-bottom: 0;
}

.navx__list a:hover .navx__link-title,
.navx__list a:focus-visible .navx__link-title {
  color: var(--color-accent);
}

.navx__list a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 6px;
  border-radius: 2px;
}

.navx__link-title {
  display: block;
  font-family: var(--serif);
  font-size: var(--text-nav-title);
  font-weight: 400;
  letter-spacing: -0.01em;
  transition: color var(--duration-normal) var(--ease-out-expo);
}

.navx__link-desc {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.82rem;
  color: var(--color-muted);
}

/* Respect reduced-motion */
@media (prefers-reduced-motion: reduce) {
  .navx__trigger,
  .navx__trigger-mark,
  .navx__panel,
  .navx__list a,
  .navx__link-title {
    transition: none !important;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: oklch(14% 0 0);
    --color-ink: oklch(94% 0 0);
    --color-muted: oklch(60% 0 0);
    --color-faint: oklch(28% 0 0);
    --color-accent: oklch(68% 0.18 35);
    --color-panel: oklch(17% 0 0);
  }
  .navx__panel {
    box-shadow: 12px 0 40px -20px oklch(0% 0 0 / 0.5);
  }
}