:root {
  color-scheme: light;
  --ink: #111827;
  --ink-soft: #35415a;
  --paper: #fff8ef;
  --paper-warm: #f3e4d0;
  --paper-deep: #e7d0b1;
  --gold: #d69525;
  --blue: #123a59;
  --blue-soft: #d7e5ec;
  --midnight: #070b15;
  --line: rgba(17, 24, 39, 0.16);
  --font-display: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --font-body: Charter, "Iowan Old Style", "Sitka Text", Georgia, serif;
  --font-ui: Optima, "Avenir Next", Candara, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.62;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration-thickness: 0.07em;
  text-underline-offset: 0.22em;
}

.site-nav {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 24px clamp(20px, 5vw, 76px);
  color: #fff6e8;
  font-family: var(--font-ui);
}

.mark {
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 0.92rem;
}

.nav-links a {
  text-decoration: none;
  opacity: 0.88;
}

.nav-links a:hover {
  opacity: 1;
}

.hero {
  min-height: 58svh;
  display: grid;
  align-content: space-between;
  background:
    linear-gradient(90deg, rgba(5, 8, 16, 0.9), rgba(7, 15, 31, 0.66)),
    url("/assets/aippocampus-readme-hero.jpg") center / cover;
  color: #fff6e8;
}

.hero-copy {
  width: min(980px, calc(100% - 40px));
  margin: 0 auto;
  padding: clamp(52px, 8vw, 100px) 0 clamp(62px, 9vw, 112px);
}

.kicker {
  margin: 0 0 18px;
  color: #ffe4a6;
  font-family: var(--font-ui);
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0;
}

h1 {
  max-width: 980px;
  margin: 0;
  font-size: clamp(3.4rem, 8vw, 7.7rem);
  line-height: 0.9;
}

.lede {
  max-width: 740px;
  margin: 26px 0 0;
  color: #fff0cf;
  font-size: clamp(1.2rem, 2vw, 1.55rem);
  line-height: 1.38;
}

.band {
  padding: clamp(52px, 7vw, 92px) clamp(20px, 5vw, 76px);
}

.band.warm {
  background: var(--paper-warm);
}

.band.blue {
  background: var(--blue-soft);
}

.band.deep {
  background: var(--paper-deep);
}

.section-grid {
  width: min(1180px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(240px, 0.78fr) minmax(0, 1.22fr);
  gap: clamp(34px, 6vw, 86px);
  align-items: start;
}

h2 {
  margin: 0;
  font-size: clamp(2rem, 3.7vw, 4rem);
  line-height: 1;
}

h3 {
  margin: 0 0 8px;
  font-size: 1.35rem;
  line-height: 1.2;
}

p {
  margin: 0;
}

.stack {
  display: grid;
  gap: 18px;
}

.section-copy {
  color: var(--ink-soft);
  font-size: 1.08rem;
}

.item-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.item {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.46);
  padding: 18px;
}

.item p,
li {
  color: var(--ink-soft);
}

.number-list {
  margin: 0;
  padding-left: 1.25rem;
  display: grid;
  gap: 12px;
}

.plain-list {
  margin: 0;
  padding-left: 1.2rem;
  display: grid;
  gap: 10px;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.98rem;
}

th,
td {
  padding: 13px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.88em;
}

pre {
  margin: 0;
  overflow-x: auto;
  border: 1px solid rgba(17, 24, 39, 0.2);
  background: rgba(7, 11, 21, 0.92);
  color: #fff6e8;
  padding: 18px;
  line-height: 1.5;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 11px 17px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: #fff8ef;
  font-family: var(--font-ui);
  font-weight: 700;
  text-decoration: none;
}

.button.secondary {
  background: transparent;
  color: var(--ink);
}

.source-note {
  color: var(--ink-soft);
  font-family: var(--font-ui);
  font-size: 0.92rem;
}

.site-footer {
  padding: 34px clamp(20px, 5vw, 76px);
  background: var(--midnight);
  color: #fff6e8;
  font-family: var(--font-ui);
  font-size: 0.92rem;
}

.footer-inner {
  width: min(1180px, 100%);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 18px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

@media (max-width: 820px) {
  .site-nav,
  .footer-inner {
    display: grid;
  }

  .section-grid,
  .item-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: clamp(3rem, 16vw, 5.2rem);
  }
}