:root {
  color-scheme: light;
  --ink: #17202a;
  --muted: #5e6a75;
  --line: #d8dde3;
  --paper: #fbfaf7;
  --soft: #eef5f1;
  --blue: #1f6feb;
  --green: #167c5b;
  --red: #b13d3d;
  --gold: #bc7a20;
  --dark: #102032;
  --shadow: 0 24px 70px rgba(16, 32, 50, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

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

button,
input {
  font: inherit;
}

.hero {
  min-height: 92vh;
  padding: 24px clamp(20px, 5vw, 72px) 54px;
  background:
    linear-gradient(120deg, rgba(16, 32, 50, 0.94), rgba(23, 42, 56, 0.84)),
    url("https://images.unsplash.com/photo-1558494949-ef010cbdcc31?auto=format&fit=crop&w=2200&q=80") center / cover;
  color: #fff;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  max-width: 1180px;
  margin: 0 auto;
}

.brand,
.nav-links {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 760;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 8px;
  background: #fff;
  color: var(--dark);
}

.nav-links {
  gap: 18px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.95rem;
}

.nav-links a:hover {
  color: #fff;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.72fr);
  gap: clamp(28px, 5vw, 76px);
  align-items: center;
  max-width: 1180px;
  min-height: calc(92vh - 84px);
  margin: 0 auto;
}

.eyebrow,
.kicker {
  margin: 0 0 10px;
  color: #277f65;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #91e8cf;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 860px;
  margin-bottom: 24px;
  font-size: clamp(2.5rem, 6vw, 5.7rem);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 12px;
  font-size: clamp(1.9rem, 3.5vw, 3.25rem);
  line-height: 1.05;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.45rem;
  line-height: 1.1;
  letter-spacing: 0;
}

.lead {
  max-width: 750px;
  color: rgba(255, 255, 255, 0.82);
  font-size: clamp(1.05rem, 1.5vw, 1.24rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button,
.repo-link,
.copy-button,
.tab,
.question-chips button,
#askButton {
  border: 1px solid transparent;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 760;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.button {
  padding: 13px 18px;
}

.button:hover,
.repo-link:hover,
.copy-button:hover,
.tab:hover,
.question-chips button:hover,
#askButton:hover {
  transform: translateY(-1px);
}

.primary {
  background: #fff;
  color: var(--dark);
}

.secondary {
  border-color: rgba(255, 255, 255, 0.35);
  color: #fff;
}

.hero-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.impact-card {
  min-height: 150px;
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(12px);
}

.impact-card.large {
  grid-column: 1 / -1;
  min-height: 190px;
}

.metric {
  display: block;
  color: #fff;
  font-size: clamp(2.1rem, 5vw, 4.25rem);
  font-weight: 850;
  line-height: 1;
}

.label {
  display: block;
  max-width: 260px;
  margin-top: 14px;
  color: rgba(255, 255, 255, 0.78);
}

.section {
  max-width: 1180px;
  margin: 0 auto;
  padding: 82px clamp(20px, 5vw, 72px);
}

.narrative {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  border-bottom: 1px solid var(--line);
}

.narrative-text {
  color: var(--muted);
  font-size: 1.15rem;
}

.section-head {
  max-width: 790px;
  margin-bottom: 34px;
}

.toolkit-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.toolkit-card {
  min-height: 560px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 10px 34px rgba(16, 32, 50, 0.06);
}

.toolkit-card[data-toolkit="pyod"] {
  border-top: 5px solid var(--blue);
}

.toolkit-card[data-toolkit="pygdebias"] {
  border-top: 5px solid var(--green);
}

.toolkit-card[data-toolkit="pygip"] {
  border-top: 5px solid var(--red);
}

.card-top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
}

.repo-link {
  height: 36px;
  padding: 8px 11px;
  border-color: var(--line);
  color: var(--dark);
  font-size: 0.86rem;
}

.card-copy {
  min-height: 112px;
  color: var(--muted);
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  min-height: 96px;
  margin: 18px 0 20px;
  align-items: flex-start;
}

.badge-row img {
  height: 28px;
  max-width: 100%;
}

.feature-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding-left: 18px;
  color: #384654;
}

.platform {
  max-width: none;
  background: #f0f5f2;
}

.platform > * {
  max-width: 1180px;
  margin-left: auto;
  margin-right: auto;
}

.pipeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid #cfd9d2;
  border-radius: 8px;
  background: #cfd9d2;
}

.pipe-step {
  min-height: 260px;
  padding: 24px;
  background: #fff;
}

.pipe-step span {
  display: block;
  margin-bottom: 42px;
  color: var(--green);
  font-weight: 850;
}

.pipe-step p {
  color: var(--muted);
}

.assistant-section {
  display: grid;
  grid-template-columns: 0.86fr 1.14fr;
  gap: 42px;
  align-items: start;
}

.assistant-copy p:not(.eyebrow) {
  color: var(--muted);
}

.question-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.question-chips button,
.tab {
  padding: 10px 12px;
  border-color: var(--line);
  background: #fff;
  color: var(--dark);
}

.assistant-panel {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.assistant-panel label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 760;
}

.ask-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

#questionInput {
  width: 100%;
  min-width: 0;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  outline: none;
}

#questionInput:focus {
  border-color: var(--blue);
}

#askButton,
.copy-button {
  padding: 12px 16px;
  background: var(--dark);
  color: #fff;
}

.answer-box {
  min-height: 220px;
  margin-top: 18px;
  padding: 18px;
  border: 1px solid #d7e4dd;
  border-radius: 8px;
  background: #f7fbf9;
  color: #293746;
  white-space: pre-wrap;
}

.install {
  border-top: 1px solid var(--line);
}

.install-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}

.tab.is-active {
  border-color: var(--green);
  background: var(--green);
  color: #fff;
}

.code-shell {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  background: #101820;
  box-shadow: var(--shadow);
}

.code-panel {
  display: none;
  min-height: 238px;
  margin: 0;
  padding: 28px;
  overflow-x: auto;
  color: #d7efe5;
  font-size: 0.98rem;
}

.code-panel.is-active {
  display: block;
}

.copy-button {
  position: absolute;
  top: 16px;
  right: 16px;
  border-color: rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.12);
}

.sources {
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.sources h2 {
  font-size: 1.2rem;
}

.source-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.source-links a {
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 960px) {
  .hero-grid,
  .narrative,
  .assistant-section {
    grid-template-columns: 1fr;
  }

  .toolkit-grid,
  .pipeline {
    grid-template-columns: 1fr 1fr;
  }

  .hero-grid {
    padding-top: 70px;
  }
}

@media (max-width: 680px) {
  .hero {
    min-height: auto;
    padding-bottom: 38px;
  }

  .nav {
    align-items: flex-start;
  }

  .nav-links {
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 10px;
    font-size: 0.86rem;
  }

  .hero-panel,
  .toolkit-grid,
  .pipeline {
    grid-template-columns: 1fr;
  }

  .impact-card.large {
    min-height: 160px;
  }

  .ask-row {
    grid-template-columns: 1fr;
  }

  .copy-button {
    position: static;
    width: calc(100% - 32px);
    margin: 0 16px 16px;
  }

  .code-panel {
    padding: 22px 18px;
    font-size: 0.9rem;
  }
}