:root {
  color-scheme: light;
  --ink: #111111;
  --muted: #555555;
  --soft: #767676;
  --line: #d7d7d7;
  --paper: #f7f7f5;
  --surface: #ffffff;
  --surface-alt: #eeeeeb;
  --inverse: #0f0f0f;
  --inverse-text: #f4f4f1;
  --max: 1180px;
}

* {
  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",
    "Noto Sans KR", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: 0;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 68px;
  padding: 0 32px;
  border-bottom: 1px solid var(--line);
  background: rgba(247, 247, 245, 0.94);
  backdrop-filter: blur(12px);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  font-weight: 700;
  white-space: nowrap;
}

.mark {
  width: 12px;
  height: 12px;
  border: 2px solid var(--ink);
  border-radius: 999px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-size: 0.9rem;
}

.nav a {
  padding: 8px 0;
  border-bottom: 1px solid transparent;
}

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

.section {
  width: min(100% - 48px, var(--max));
  margin: 0 auto;
  border-bottom: 1px solid var(--line);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  gap: 52px;
  align-items: center;
  min-height: calc(100vh - 68px);
  padding: 72px 0 64px;
}

.hero-copy {
  display: grid;
  gap: 28px;
}

.eyebrow {
  color: var(--soft);
  font-size: 0.78rem;
  font-weight: 700;
  line-height: 1.25;
  text-transform: uppercase;
}

h1 {
  max-width: 830px;
  font-size: 3.55rem;
  line-height: 1.08;
  font-weight: 760;
  word-break: keep-all;
}

h1 span {
  display: block;
}

.lead {
  max-width: 760px;
  color: var(--muted);
  font-size: 1.1rem;
  line-height: 1.82;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: 8px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 700;
}

.button:hover {
  background: var(--ink);
  color: var(--surface);
}

.button.primary {
  background: var(--ink);
  color: var(--surface);
}

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

.research-map {
  min-height: 520px;
  border: 1px solid var(--ink);
  background: var(--surface);
}

.map-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 54px;
  padding: 0 18px;
  border-bottom: 1px solid var(--ink);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
}

.map-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  grid-template-rows: repeat(6, 1fr);
  min-height: 464px;
  padding: 18px;
  background:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: calc(100% / 6) calc(100% / 6);
}

.map-grid::before,
.map-grid::after {
  content: "";
  position: absolute;
  inset: 50% 18px auto;
  height: 1px;
  background: var(--ink);
}

.map-grid::after {
  inset: 18px auto 18px 50%;
  width: 1px;
  height: auto;
}

.map-node {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 104px;
  padding: 14px;
  border: 1px solid var(--ink);
  background: var(--surface);
}

.map-node span {
  font-size: 1.18rem;
  font-weight: 800;
}

.map-node small {
  color: var(--muted);
  font-size: 0.74rem;
}

.map-node:hover {
  background: var(--inverse);
  color: var(--inverse-text);
}

.map-node:hover small {
  color: var(--inverse-text);
}

.node-os {
  grid-column: 1 / 3;
  grid-row: 1 / 3;
}

.node-arena {
  grid-column: 4 / 7;
  grid-row: 1 / 3;
}

.node-hci {
  grid-column: 3 / 5;
  grid-row: 3 / 5;
}

.node-graph {
  grid-column: 1 / 3;
  grid-row: 5 / 7;
}

.node-silicon {
  grid-column: 5 / 7;
  grid-row: 5 / 7;
}

.thesis {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 40px;
  padding: 76px 0;
}

.section-label {
  color: var(--soft);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.thesis-copy {
  display: grid;
  gap: 18px;
}

h2 {
  font-size: 2.15rem;
  line-height: 1.18;
  font-weight: 760;
}

.thesis-copy p,
.section-head p,
.sponsor-copy p {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.78;
}

.frontiers,
.model,
.fellows,
.team,
.sponsors {
  padding: 82px 0;
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 0.55fr);
  gap: 40px;
  align-items: end;
  margin-bottom: 36px;
}

.section-head > div {
  display: grid;
  gap: 12px;
}

.frontier-list {
  border-top: 1px solid var(--ink);
}

.frontier {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 28px;
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}

.frontier-index {
  color: var(--soft);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.9rem;
}

.frontier-body {
  display: grid;
  grid-template-columns: minmax(160px, 0.3fr) minmax(0, 1fr);
  gap: 18px 36px;
}

.frontier h3 {
  font-size: 1.42rem;
  line-height: 1.1;
}

.frontier-line {
  color: var(--ink);
  font-size: 0.95rem;
  font-weight: 760;
}

.frontier-body > p:not(.frontier-line) {
  grid-column: 2;
  color: var(--muted);
}

.frontier dl {
  grid-column: 2;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 4px 0 0;
}

.frontier dl div {
  border-top: 1px solid var(--line);
  padding-top: 10px;
}

dt {
  color: var(--soft);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
}

dd {
  margin: 3px 0 0;
  color: var(--ink);
  font-size: 0.92rem;
}

.model-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--ink);
  border-left: 1px solid var(--line);
}

.model-grid article {
  min-height: 260px;
  padding: 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.model-step {
  display: block;
  margin-bottom: 52px;
  color: var(--soft);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.82rem;
}

.model-grid h3 {
  margin-bottom: 12px;
  font-size: 1.08rem;
}

.model-grid p {
  color: var(--muted);
  font-size: 0.95rem;
}

.fellow-table {
  border-top: 1px solid var(--ink);
}

.fellow-table > div {
  display: grid;
  grid-template-columns: minmax(100px, 0.25fr) minmax(240px, 0.85fr) minmax(180px, 0.6fr);
  gap: 24px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.fellow-table > div:first-child {
  color: var(--soft);
  font-size: 0.76rem;
  font-weight: 800;
  text-transform: uppercase;
}

.fellow-table span:first-child {
  font-weight: 760;
}

.fellow-table span:not(:first-child) {
  color: var(--muted);
}

.sponsors {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(420px, 1fr);
  gap: 48px;
  align-items: start;
}

.sponsor-copy {
  display: grid;
  gap: 16px;
}

.sponsor-table {
  border-top: 1px solid var(--ink);
}

.sponsor-table > div {
  display: grid;
  grid-template-columns: minmax(150px, 0.42fr) minmax(0, 1fr);
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.sponsor-table > div:first-child {
  color: var(--soft);
  font-size: 0.76rem;
  font-weight: 800;
  text-transform: uppercase;
}

.sponsor-table span:nth-child(2) {
  color: var(--muted);
}

.team-table {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: 1px solid var(--ink);
  border-left: 1px solid var(--line);
}

.team-table div {
  display: grid;
  gap: 24px;
  min-height: 210px;
  padding: 20px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.team-table span {
  color: var(--soft);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.88rem;
}

.team-table dl {
  display: grid;
  gap: 8px;
  margin: 0;
}

.team-table dt {
  margin-top: 10px;
}

.team-table dt:first-child {
  margin-top: 0;
}

.team-table dd {
  font-size: 1rem;
  font-weight: 760;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  width: min(100% - 48px, var(--max));
  margin: 0 auto;
  padding: 28px 0 40px;
  color: var(--soft);
  font-size: 0.88rem;
}

@media (max-width: 980px) {
  .hero,
  .sponsors,
  .section-head,
  .thesis {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 54px;
  }

  h1 {
    font-size: 2.75rem;
  }

  .research-map {
    min-height: 460px;
  }

  .map-grid {
    min-height: 404px;
  }

  .model-grid,
  .team-table {
    grid-template-columns: 1fr;
  }

  .frontier-body {
    grid-template-columns: 1fr;
  }

  .frontier-body > p:not(.frontier-line),
  .frontier dl {
    grid-column: 1;
  }
}

@media (max-width: 680px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
    padding: 18px 20px;
  }

  .nav {
    width: 100%;
    flex-wrap: wrap;
    justify-content: flex-start;
    gap: 12px 24px;
    overflow-x: visible;
  }

  .section,
  .site-footer {
    width: min(100% - 32px, var(--max));
  }

  h1 {
    font-size: 2.05rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  .lead {
    font-size: 1rem;
  }

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

  .button {
    width: 100%;
  }

  .research-map {
    min-height: 0;
  }

  .map-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-height: 0;
    background-size: 48px 48px;
  }

  .map-grid::before,
  .map-grid::after {
    display: none;
  }

  .map-node {
    min-height: 92px;
  }

  .frontiers,
  .model,
  .fellows,
  .team,
  .sponsors,
  .thesis {
    padding: 56px 0;
  }

  .frontier {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .frontier dl,
  .fellow-table > div,
  .sponsor-table > div {
    grid-template-columns: 1fr;
  }

  .fellow-table > div:first-child {
    display: none;
  }

  .fellow-table > div {
    gap: 8px;
  }

  .site-footer {
    flex-direction: column;
  }
}