:root {
  color-scheme: light;
  --ink: #17191f;
  --text: #343842;
  --muted: #687080;
  --line: #d8dde6;
  --paper: #f8f7f3;
  --white: #ffffff;
  --teal: #087f7a;
  --coral: #c84f3f;
  --amber: #b98217;
  --blue: #285a9f;
  --rose: #b73d6b;
  --green: #4c8b3f;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(23, 25, 31, 0.04) 1px, transparent 1px),
    linear-gradient(180deg, rgba(23, 25, 31, 0.04) 1px, transparent 1px),
    var(--paper);
  background-size: 34px 34px;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid rgba(23, 25, 31, 0.12);
  background: rgba(248, 247, 243, 0.94);
  backdrop-filter: blur(12px);
}

.brand {
  font-weight: 800;
  font-size: 18px;
}

nav {
  display: flex;
  gap: clamp(12px, 3vw, 28px);
  color: var(--muted);
  font-size: 14px;
}

nav a:hover {
  color: var(--teal);
}

.hero {
  min-height: calc(100vh - 64px);
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: clamp(32px, 7vw, 88px);
  align-items: center;
  padding: clamp(44px, 7vw, 84px) clamp(20px, 5vw, 72px) 56px;
}

.hero-copy {
  max-width: 760px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  letter-spacing: 0;
  line-height: 1.04;
}

h1 {
  font-size: clamp(58px, 10vw, 132px);
  text-shadow: 0 8px 0 rgba(8, 127, 122, 0.12);
}

h2 {
  max-width: 900px;
  font-size: clamp(30px, 5vw, 64px);
}

.lead {
  max-width: 720px;
  margin: 22px 0 0;
  color: var(--text);
  font-size: clamp(18px, 2.4vw, 26px);
  line-height: 1.42;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.actions a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--white);
  font-weight: 700;
}

.actions a:nth-child(2) {
  background: var(--white);
  color: var(--ink);
}

.actions a:nth-child(3) {
  border-color: var(--teal);
  background: var(--teal);
}

.hero-figure,
.wide-figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(23, 25, 31, 0.14);
  background: var(--white);
  box-shadow: 12px 12px 0 rgba(23, 25, 31, 0.08);
}

.hero-figure {
  align-self: center;
}

.hero-figure img,
.wide-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.wide-figure {
  margin-top: clamp(28px, 5vw, 54px);
}

.emotion-board {
  min-height: 520px;
  display: grid;
  grid-template-columns: repeat(2, minmax(140px, 1fr));
  gap: 16px;
  align-content: center;
}

.emotion-card,
.signal-card {
  min-height: 164px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 22px;
  border: 1px solid rgba(23, 25, 31, 0.13);
  background: var(--white);
  box-shadow: 10px 10px 0 rgba(23, 25, 31, 0.08);
  transform: rotate(-1deg);
}

.emotion-card:nth-child(even) {
  transform: rotate(1deg);
}

.emotion-card span,
.signal-card span {
  font-size: 42px;
}

.emotion-card strong,
.signal-card strong {
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.04;
}

.emotion-card p {
  margin: 0;
  color: var(--text);
  font-weight: 700;
}

.emotion-card.joy {
  border-top: 10px solid var(--amber);
}

.dataset-release {
  max-width: 920px;
  margin: 28px 0 0;
  color: var(--text);
  font-size: 17px;
  line-height: 1.7;
}

.dataset-release a {
  color: var(--teal);
  font-weight: 800;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.emotion-card.awe {
  border-top: 10px solid var(--blue);
}

.emotion-card.fear {
  border-top: 10px solid var(--coral);
}

.emotion-card.calm {
  border-top: 10px solid var(--green);
}

.signal-card {
  grid-column: 1 / -1;
  min-height: 130px;
  background: var(--ink);
  color: var(--white);
  transform: rotate(0deg);
}

.band,
.split,
.citation {
  padding: clamp(56px, 9vw, 110px) clamp(20px, 5vw, 72px);
}

.band {
  background: var(--white);
}

.band.muted {
  background: #eef2ef;
}

.section-heading {
  display: grid;
  gap: 8px;
  margin-bottom: clamp(28px, 5vw, 54px);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.stat-grid article {
  min-height: 178px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 24px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.stat-grid article:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 34px rgba(23, 25, 31, 0.10);
}

.stat-grid strong {
  font-size: clamp(34px, 5vw, 70px);
  line-height: 1;
}

.stat-grid span {
  color: var(--muted);
  font-weight: 700;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: clamp(28px, 6vw, 72px);
  align-items: start;
}

pre {
  max-width: 100%;
  overflow-x: auto;
  margin: 0;
  padding: 24px;
  border: 1px solid var(--line);
  background: var(--ink);
  color: #f4f7fb;
  font-size: 14px;
  line-height: 1.7;
}

.pipeline {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
}

.pipeline li {
  min-height: 180px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 20px;
  padding: 22px;
  background: var(--white);
  color: var(--text);
  font-weight: 800;
  border-top: 8px solid var(--teal);
}

.pipeline li:nth-child(2) {
  border-top-color: var(--amber);
}

.pipeline li:nth-child(3) {
  border-top-color: var(--blue);
}

.pipeline li:nth-child(4) {
  border-top-color: var(--rose);
}

.pipeline li:nth-child(5) {
  border-top-color: var(--green);
}

.pipeline span {
  color: var(--coral);
  font-size: 13px;
}

.citation {
  background: var(--ink);
  color: var(--white);
}

.citation .eyebrow {
  color: #65c7bd;
}

.citation pre {
  border-color: rgba(255, 255, 255, 0.18);
  background: #0f1116;
}

@media (max-width: 880px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .hero,
  .split {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .emotion-board {
    min-height: 360px;
  }

  .stat-grid,
  .pipeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  h1 {
    font-size: 56px;
  }

  .actions a {
    width: 100%;
  }

  .emotion-board,
  .stat-grid,
  .pipeline {
    grid-template-columns: 1fr;
  }
}