/*
  The one-page layout (hero, stats row, sections, timeline, FAQ) follows
  generatorresidency.org. The palette is watercolor paper and ink: a warm
  cream ground, slate-blue text, and a terracotta accent.
*/

:root {
  --bg: #f7f0e6;
  --text: #22313d;
  --text-2: #33424e;
  --text-3: #52606b;
  --text-4: #7f8a91;
  --rule: #e6dccd;
  --line: #c9bba7;
  --line-2: #d9ccb9;
  --note-bg: #fbf7f1;
  --accent: #a9532f;
  --accent-soft: #f1dccd;
  --art-opacity: 1;
  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #161b21;
  --text: #ebe6dd;
  --text-2: #d4cec4;
  --text-3: #aea9a0;
  --text-4: #868c92;
  --rule: #29303a;
  --line: #4b535d;
  --line-2: #39414b;
  --note-bg: #1d232b;
  --accent: #e39a74;
  --accent-soft: #3a2a24;
  --art-opacity: 0.75;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 4.5rem;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}

a:hover {
  border-bottom-color: var(--text);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 2px;
}

.wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 2rem;
}

.skip {
  position: absolute;
  left: -9999px;
}

.skip:focus {
  left: 1rem;
  top: 1rem;
  z-index: 20;
  background: var(--bg);
  padding: 0.4rem 0.6rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
}

.header-row {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  height: 3.5rem;
}

.wordmark {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  border-bottom: none;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  margin-left: auto;
  font-size: 0.9rem;
}

.nav a {
  color: var(--text-3);
  border-bottom: none;
}

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

.nav .nav-cta {
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.25rem 0.7rem;
}

.nav .nav-cta:hover {
  border-color: var(--text);
}

.theme-toggle {
  background: none;
  border: 0;
  padding: 0.4rem;
  border-radius: 6px;
  color: var(--text-4);
  cursor: pointer;
  line-height: 0;
}

.theme-toggle:hover {
  color: var(--text);
}

.theme-toggle .icon-sun {
  display: none;
}

:root[data-theme="dark"] .theme-toggle .icon-moon {
  display: none;
}

:root[data-theme="dark"] .theme-toggle .icon-sun {
  display: inline;
}

/* Hero: the painting sits behind the content and fades into the paper */
.hero-band {
  position: relative;
  overflow: hidden;
}

.hero-art-frame,
.hero-art-blur {
  position: absolute;
  top: 0;
  right: 0;
  width: 64%;
  height: 100%;
  pointer-events: none;
}

/* A soft-edged panel that bleeds off the right of the page. The frame fades the
   top and bottom and the image fades the left; nesting avoids mask-composite. */
.hero-art-frame {
  -webkit-mask-image: linear-gradient(to bottom, transparent, #000 14%, #000 84%, transparent);
  mask-image: linear-gradient(to bottom, transparent, #000 14%, #000 84%, transparent);
}

.hero-art {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 55%;
  opacity: var(--art-opacity);
  -webkit-mask-image: linear-gradient(to right, transparent 6%, #000 40%);
  mask-image: linear-gradient(to right, transparent 6%, #000 40%);
}

/* Blur only the fading edges (left, top, bottom), so they go soft as they fade */
.hero-art-blur {
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  -webkit-mask-image:
    linear-gradient(to right, transparent, #000 8%, transparent 34%),
    linear-gradient(to bottom, transparent, #000 6%, transparent 18%, transparent 80%, #000 93%, transparent);
  -webkit-mask-composite: source-over;
  mask-image:
    linear-gradient(to right, transparent, #000 8%, transparent 34%),
    linear-gradient(to bottom, transparent, #000 6%, transparent 18%, transparent 80%, #000 93%, transparent);
  mask-composite: add;
}

.hero-band .hero {
  z-index: 1;
}

:root[data-theme="dark"] .hero-art {
  filter: brightness(0.75);
}

/* Paper grain over the whole page */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 100;
  pointer-events: none;
  opacity: 0.05;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

.hero {
  position: relative;
  min-height: 30rem;
  padding-top: 7rem;
  padding-bottom: 6rem;
}

.eyebrow {
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 0.75rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: 3.2rem;
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.02em;
  max-width: 14ch;
}

.lede {
  margin-top: 1rem;
  font-size: 1.15rem;
  color: var(--text-2);
  /* Wrap before the painting begins */
  max-width: 23rem;
  text-wrap: balance;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-top: 1.75rem;
}

.button {
  display: inline-block;
  background: var(--text);
  color: var(--bg);
  border: none;
  border-radius: 6px;
  padding: 0.55rem 1.1rem;
  font-size: 0.95rem;
  font-weight: 500;
}

.button:hover {
  opacity: 0.85;
}

.text-link {
  font-size: 0.9rem;
  color: var(--text-3);
  border-bottom: 1px solid var(--line-2);
}

.text-link:hover {
  color: var(--text);
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line-2);
}

.stats dt {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.stats dd {
  font-size: 0.85rem;
  color: var(--text-3);
  margin-top: 0.2rem;
}

/* Intro */
.intro p {
  font-size: 1.15rem;
  line-height: 1.6;
  color: var(--text-2);
  padding: 2rem 0 1rem;
  max-width: 44rem;
}

.intro strong {
  color: var(--text);
  font-weight: 600;
}

/* Sections */
.section {
  padding-top: 3.5rem;
  padding-bottom: 1rem;
}

.section h2 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
}

.section h2::before {
  content: "— ";
  color: var(--accent);
  font-weight: 400;
}

.section > p {
  font-size: 0.95rem;
  color: var(--text-2);
  margin-bottom: 0.9rem;
  max-width: 44rem;
}

.section > p.section-lede {
  color: var(--text-3);
  margin-bottom: 1.5rem;
}

.section h3 {
  font-size: 1rem;
  font-weight: 600;
}

.sub-h {
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
}

/* Problem rows */
.rows .row {
  display: grid;
  grid-template-columns: 13rem 1fr;
  gap: 2rem;
  padding: 1rem 0;
  border-top: 1px solid var(--rule);
}

.rows .row:last-child {
  border-bottom: 1px solid var(--rule);
}

.rows p {
  font-size: 0.92rem;
  color: var(--text-3);
}

/* Cards */
.cards {
  display: grid;
  gap: 1rem;
}

.cards.two {
  grid-template-columns: repeat(2, 1fr);
}

.cards.four {
  grid-template-columns: repeat(2, 1fr);
}

.card {
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 1.25rem;
  background: var(--note-bg);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.card p {
  font-size: 0.9rem;
  color: var(--text-3);
}

.card .card-sub {
  color: var(--text-4);
  font-size: 0.85rem;
  margin-top: -0.35rem;
}

.card .text-link {
  margin-top: auto;
  align-self: flex-start;
}

/* Offer list */
.offer {
  list-style: none;
}

.offer li {
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--rule);
  font-size: 0.92rem;
  color: var(--text-3);
}

.offer li strong {
  color: var(--text);
  font-weight: 600;
}

/* Research questions */
.questions {
  list-style: none;
}

.questions li {
  display: grid;
  grid-template-columns: 9.5rem 1fr;
  gap: 1.5rem;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--rule);
  font-size: 0.92rem;
  color: var(--text-2);
}

.questions .tag {
  font-size: 0.8rem;
  color: var(--accent);
  padding-top: 0.1rem;
}

/* Timeline */
.timeline {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.timeline li {
  border-top: 2px solid var(--accent);
  padding-top: 0.9rem;
}

.timeline .phase {
  display: block;
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 0.25rem;
}

.timeline p {
  font-size: 0.9rem;
  color: var(--text-3);
  margin-top: 0.35rem;
}

/* FAQ */
.faq details {
  border-bottom: 1px solid var(--rule);
}

.faq details:first-child {
  border-top: 1px solid var(--rule);
}

.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 0.85rem 2rem 0.85rem 0;
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "+";
  position: absolute;
  right: 0.25rem;
  color: var(--text-4);
}

.faq details[open] summary::after {
  content: "−";
}

.faq details p {
  font-size: 0.92rem;
  color: var(--text-3);
  padding-bottom: 1rem;
  max-width: 44rem;
}

/* Footer */
.site-footer {
  margin-top: 5rem;
  border-top: 1px solid var(--rule);
  padding: 1.5rem 0 2.5rem;
  font-size: 0.85rem;
  color: var(--text-4);
}

.footer-row {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
}

.site-footer a {
  color: var(--text-3);
  border-bottom-color: var(--line-2);
}

/* Small screens */
@media (max-width: 720px) {
  .wrap {
    padding: 0 1rem;
  }

  .nav a:not(.nav-cta) {
    display: none;
  }

  .hero {
    padding-top: 3rem;
  }

  .hero-art-frame,
  .hero-art-blur {
    width: 100%;
  }

  .hero-art {
    opacity: calc(var(--art-opacity) * 0.3);
  }

  .hero h1 {
    font-size: 2.3rem;
  }

  .stats,
  .cards.two,
  .cards.four,
  .timeline {
    grid-template-columns: 1fr 1fr;
  }

  .cards.two,
  .cards.four,
  .timeline {
    grid-template-columns: 1fr;
  }

  .rows .row,
  .questions li {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
}