:root {
  color-scheme: light;
  --bg: #f8f6f0;
  --surface: #ffffff;
  --surface-soft: #f1f6f3;
  --ink: #222322;
  --muted: #666b62;
  --line: #ddd6c8;
  --accent: #0f766e;
  --accent-strong: #0a5d57;
  --warm: #b75d2a;
  --warm-soft: #f1dccb;
  --shadow: 0 18px 45px rgba(34, 35, 34, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  line-height: 1.6;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  padding: 0 40px;
  border-bottom: 1px solid rgba(221, 214, 200, 0.8);
  background: rgba(248, 246, 240, 0.9);
  backdrop-filter: blur(14px);
}

.brand {
  font-weight: 760;
  letter-spacing: 0;
}

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-size: 14px;
}

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

main {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
  gap: 56px;
  min-height: calc(100vh - 68px);
  align-items: center;
  padding: 72px 0 64px;
}

.hero-copy {
  max-width: 780px;
}

.eyebrow,
.card-kicker {
  margin: 0 0 12px;
  color: var(--warm);
  font-size: 12px;
  font-weight: 760;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  max-width: 820px;
  font-size: clamp(44px, 6.2vw, 78px);
  line-height: 1;
  letter-spacing: 0;
}

.intro {
  max-width: 680px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 19px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 14px;
  font-weight: 720;
}

.button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.button.primary:hover {
  background: var(--accent-strong);
}

.button.secondary {
  background: transparent;
}

.button.secondary:hover {
  border-color: var(--ink);
}

.hero-visual {
  position: relative;
  min-height: 520px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(241, 246, 243, 0.78)),
    repeating-linear-gradient(0deg, rgba(15, 118, 110, 0.06) 0, rgba(15, 118, 110, 0.06) 1px, transparent 1px, transparent 44px),
    repeating-linear-gradient(90deg, rgba(15, 118, 110, 0.05) 0, rgba(15, 118, 110, 0.05) 1px, transparent 1px, transparent 44px);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero-visual::before,
.hero-visual::after {
  position: absolute;
  content: "";
  border: 1px solid rgba(15, 118, 110, 0.16);
  pointer-events: none;
}

.hero-visual::before {
  inset: 78px 42px 118px;
  border-radius: 50%;
  transform: rotate(-12deg);
}

.hero-visual::after {
  inset: 130px 92px 88px 70px;
  border-radius: 42% 58% 52% 48%;
  transform: rotate(18deg);
}

.visual-topline {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  color: var(--muted);
  font-size: 13px;
}

.visual-topline strong {
  color: var(--ink);
}

.system-map {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: 330px;
  margin-top: 36px;
}

.map-node {
  position: absolute;
  width: min(178px, 44%);
  min-height: 94px;
  padding: 18px;
  border: 1px solid rgba(15, 118, 110, 0.24);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 12px 32px rgba(34, 35, 34, 0.08);
}

.map-node span {
  display: block;
  margin-bottom: 8px;
  color: var(--warm);
  font-size: 12px;
  font-weight: 760;
  text-transform: uppercase;
}

.map-node strong {
  display: block;
  font-size: 18px;
  line-height: 1.2;
}

.map-node.core {
  top: 50%;
  left: 50%;
  z-index: 2;
  width: min(210px, 54%);
  min-height: 116px;
  border-color: rgba(183, 93, 42, 0.42);
  transform: translate(-50%, -50%);
}

.map-node.input {
  top: 0;
  left: 0;
}

.map-node.output {
  right: 0;
  top: 34px;
}

.map-node.loop {
  bottom: 0;
  left: 12%;
  width: min(225px, 62%);
}

.signal-list {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 24px;
}

.signal-list p {
  min-height: 56px;
  margin: 0;
  padding: 10px 12px;
  border-top: 2px solid rgba(183, 93, 42, 0.4);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.35;
}

.section {
  padding: 88px 0;
  border-top: 1px solid var(--line);
}

.section.alt {
  width: 100vw;
  margin-left: calc(50% - 50vw);
  padding-left: max(20px, calc((100vw - 1120px) / 2));
  padding-right: max(20px, calc((100vw - 1120px) / 2));
  background: #edf3ef;
}

.section-heading {
  display: grid;
  grid-template-columns: 0.34fr 0.66fr;
  gap: 40px;
  align-items: end;
  margin-bottom: 34px;
}

h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.05;
  letter-spacing: 0;
}

h3 {
  margin: 0;
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: 0;
}

.thought-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: 18px;
}

.essay-preview,
.project-card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.essay-preview {
  min-height: 310px;
}

.essay-preview p:not(.card-kicker),
.project-card p:not(.card-kicker),
.note-grid p,
.build-item p {
  color: var(--muted);
}

.text-link {
  display: inline-flex;
  margin-top: 14px;
  color: var(--accent-strong);
  font-size: 14px;
  font-weight: 760;
}

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

.status-note {
  display: inline-flex;
  margin-top: auto;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.thesis-list {
  display: grid;
  gap: 12px;
}

.thesis-list div {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 18px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.thesis-list span {
  color: var(--warm);
  font-size: 13px;
  font-weight: 800;
}

.thesis-list p {
  margin: 0;
  color: var(--muted);
}

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

.project-card {
  display: flex;
  flex-direction: column;
  min-height: 300px;
}

.project-card .text-link {
  margin-top: auto;
}

.build-item {
  display: grid;
  grid-template-columns: 0.34fr 0.66fr;
  gap: 32px;
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.build-item.muted {
  opacity: 0.78;
}

.note-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 36px;
}

.note-grid article {
  padding-top: 18px;
  border-top: 2px solid rgba(15, 118, 110, 0.32);
}

.article-shell {
  width: min(880px, calc(100% - 40px));
}

.article-page {
  padding: 74px 0 96px;
}

.article-page h1 {
  max-width: 820px;
  font-size: clamp(40px, 6vw, 68px);
  line-height: 1.04;
}

.article-page h2 {
  margin-top: 58px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: clamp(26px, 3vw, 36px);
}

.article-page p,
.article-page li {
  color: var(--muted);
  font-size: 18px;
}

.article-page p {
  margin: 18px 0 0;
}

.article-lede {
  max-width: 760px;
  color: var(--ink) !important;
  font-size: 21px !important;
}

.article-page blockquote {
  margin: 26px 0;
  padding: 8px 0 8px 22px;
  border-left: 3px solid var(--warm);
}

.article-page blockquote p {
  color: var(--ink);
}

.article-page ul,
.article-page ol {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
  padding-left: 24px;
}

.article-page code {
  border: 1px solid rgba(15, 118, 110, 0.18);
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--accent-strong);
  font-size: 0.92em;
}

.article-page pre {
  margin: 22px 0 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #242824;
  overflow-x: auto;
}

.article-page pre code {
  border: 0;
  background: transparent;
  color: #f7f5ef;
  font-size: 14px;
  line-height: 1.7;
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 34px 0 44px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.footer p {
  margin: 0 0 4px;
  color: var(--ink);
}

.footer a {
  color: var(--accent-strong);
  font-weight: 700;
}

@media (max-width: 920px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 56px 0;
  }

  .hero-visual {
    min-height: 460px;
  }

  .project-grid,
  .note-grid {
    grid-template-columns: 1fr;
  }

  .project-card {
    min-height: auto;
  }
}

@media (max-width: 820px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
    padding: 16px 20px;
  }

  .nav {
    width: 100%;
    gap: 14px;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  main,
  .footer {
    width: min(100% - 32px, 1120px);
  }

  h1 {
    font-size: clamp(40px, 13vw, 58px);
  }

  .intro {
    font-size: 17px;
  }

  .section {
    padding: 64px 0;
  }

  .section-heading,
  .thought-layout,
  .build-item {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .essay-preview {
    min-height: auto;
  }

  .footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 560px) {
  .hero-visual {
    min-height: 560px;
  }

  .system-map {
    min-height: 390px;
  }

  .map-node,
  .map-node.core,
  .map-node.loop {
    position: relative;
    inset: auto;
    width: 100%;
    min-height: auto;
    margin-bottom: 10px;
    transform: none;
  }

  .signal-list {
    grid-template-columns: 1fr;
    margin-top: 8px;
  }
}

@media (max-width: 460px) {
  .nav {
    font-size: 13px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }
}