/* -------------------------------------------------------
   GOLEM — Ontology for Narrative and Fiction
   Visual system: editorial, restrained, research-oriented
   ------------------------------------------------------- */

:root {
  color-scheme: light;
  --paper: #f7f7f2;
  --surface: #ffffff;
  --surface-soft: #eff2ec;
  --ink: #192b32;
  --ink-soft: #42565b;
  --muted: #687a7b;
  --line: #dce3dc;
  --teal: #176b63;
  --teal-dark: #10554f;
  --teal-pale: #dcece5;
  --gold: #c68a4a;
  --navy: #172e37;
  --navy-light: #25434b;
  --radius: 5px;
  --content-width: 1120px;
  --page-gutter: clamp(1.25rem, 5vw, 4.5rem);
  --shadow-soft: 0 12px 34px rgb(25 43 50 / 5%);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    Inter, "Avenir Next", Avenir, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

a:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 4px;
  border-radius: 2px;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

::selection {
  background: var(--teal-pale);
  color: var(--ink);
}

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

h1,
h2,
h3 {
  font-weight: 550;
  letter-spacing: -0.04em;
}

h1,
h2 {
  font-family: Georgia, "Times New Roman", serif;
}

h1 {
  max-width: 720px;
  margin-bottom: 1.5rem;
  font-size: clamp(3.1rem, 6.5vw, 5.7rem);
  line-height: 1.02;
}

h1 em {
  color: var(--teal);
  font-weight: 400;
}

h2 {
  font-size: clamp(2.1rem, 4vw, 3.2rem);
  line-height: 1.15;
}

h3 {
  font-size: 1.3rem;
  line-height: 1.3;
}

p {
  color: var(--ink-soft);
}

main,
.site-header,
.site-footer {
  width: min(100%, var(--content-width));
  margin-inline: auto;
}

.section {
  padding: clamp(4.5rem, 9vw, 7.5rem) var(--page-gutter);
}

.eyebrow {
  margin-bottom: 1.25rem;
  color: var(--teal);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.15em;
  line-height: 1.5;
}

.section-heading {
  max-width: 660px;
  margin-bottom: 3rem;
}

.section-heading h2 {
  margin-bottom: 0;
}

.section-heading-wide {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 3rem;
  max-width: none;
}

.section-description {
  max-width: 370px;
  margin-bottom: 0.25rem;
  font-size: 0.96rem;
}

/* Header */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 1.25rem var(--page-gutter);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  flex-shrink: 0;
}

.brand-mark {
  display: grid;
  width: 2.2rem;
  height: 2.2rem;
  place-items: center;
  border: 1px solid var(--teal);
  border-radius: 50%;
  color: var(--teal);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.25rem;
}

.brand-name,
.footer-brand {
  color: var(--ink);
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.7vw, 2rem);
}

.main-nav a {
  color: var(--ink-soft);
  font-size: 0.82rem;
  font-weight: 550;
  white-space: nowrap;
  transition: color 160ms ease;
}

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

.main-nav .nav-external {
  padding: 0.55rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
}

/* Hero */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  align-items: center;
  gap: clamp(2rem, 5vw, 5rem);
  min-height: 540px;
  padding: clamp(4.5rem, 9vw, 7.5rem) var(--page-gutter);
  overflow: hidden;
}

.hero-copy {
  position: relative;
  z-index: 1;
}

.hero-intro {
  max-width: 580px;
  margin-bottom: 2rem;
  font-size: clamp(1.02rem, 1.5vw, 1.14rem);
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 2rem;
}

.button {
  display: inline-flex;
  min-height: 47px;
  align-items: center;
  justify-content: center;
  gap: 0.7rem;
  padding: 0.75rem 1.1rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 0.86rem;
  font-weight: 650;
  transition:
    background 160ms ease,
    border-color 160ms ease,
    transform 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--teal);
  color: white;
}

.button-primary:hover {
  background: var(--teal-dark);
  color: white;
}

.button-secondary {
  border-color: var(--line);
  background: transparent;
  color: var(--ink);
}

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

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  color: var(--muted);
  font-size: 0.76rem;
}

.hero-meta strong {
  color: var(--ink);
  font-weight: 750;
}

.status-dot,
.release-indicator {
  display: inline-block;
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--teal);
}

.meta-divider {
  margin-inline: 0.15rem;
  color: #a1b0a9;
}

/* CSS-only narrative illustration */

.hero-visual {
  position: relative;
  width: 100%;
  max-width: 410px;
  aspect-ratio: 1;
  justify-self: center;
  isolation: isolate;
}

.hero-visual::before {
  position: absolute;
  z-index: -2;
  inset: 10%;
  border-radius: 50%;
  background:
    radial-gradient(
      circle at center,
      rgb(220 236 229 / 85%) 0,
      rgb(220 236 229 / 38%) 45%,
      transparent 72%
    );
  content: "";
}

.visual-orbit {
  position: absolute;
  z-index: -1;
  inset: 12%;
  border: 1px solid rgb(23 107 99 / 18%);
  border-radius: 50%;
}

.orbit-one {
  transform: rotate(-27deg) scaleY(0.7);
}

.orbit-two {
  transform: rotate(48deg) scaleY(0.7);
}

.visual-line {
  position: absolute;
  z-index: -1;
  top: 50%;
  left: 18%;
  width: 64%;
  height: 1px;
  background: rgb(23 107 99 / 35%);
  transform-origin: center;
}

.line-one {
  transform: rotate(31deg);
}

.line-two {
  transform: rotate(-38deg);
}

.line-three {
  transform: rotate(90deg);
}

.node {
  position: absolute;
  display: flex;
  width: 108px;
  min-height: 94px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  border: 1px solid rgb(23 107 99 / 25%);
  border-radius: 50%;
  background: rgb(255 255 255 / 94%);
  box-shadow: var(--shadow-soft);
}

.node-central {
  top: 36%;
  left: 35%;
  width: 125px;
  min-height: 125px;
  border-color: var(--teal);
  background: var(--navy);
  color: white;
}

.node-symbol {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 2.5rem;
  line-height: 1;
}

.node-label {
  font-size: 0.76rem;
  font-weight: 650;
}

.node-central .node-label {
  color: #e0ede8;
}

.node-icon {
  color: var(--teal);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.node-character {
  top: 7%;
  left: 10%;
}

.node-event {
  top: 11%;
  right: 6%;
}

.node-context {
  right: 15%;
  bottom: 6%;
}

.visual-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  margin: 0;
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-align: center;
}

/* Three principles */

.principles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem;
  padding: 2rem var(--page-gutter);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgb(255 255 255 / 48%);
}

.principle {
  display: flex;
  align-items: start;
  gap: 1rem;
}

.principle-number {
  padding-top: 0.25rem;
  color: var(--teal);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.1em;
}

.principle h2 {
  margin-bottom: 0.35rem;
  font-family: inherit;
  font-size: 1.03rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.principle p {
  max-width: 260px;
  margin-bottom: 0;
  font-size: 0.85rem;
  line-height: 1.7;
}

/* About */

.section-about {
  padding-bottom: 6.5rem;
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 7vw, 6rem);
}

.about-content .lead {
  margin: 0;
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.5rem, 2.6vw, 2.15rem);
  line-height: 1.45;
  letter-spacing: -0.025em;
}

.about-detail p {
  font-size: 0.97rem;
}

.text-link,
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--teal);
  font-size: 0.87rem;
  font-weight: 700;
}

.text-link:hover,
.card-link:hover {
  color: var(--teal-dark);
}

/* Resources */

.section-ontology {
  background: var(--surface-soft);
}

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

.resource-card {
  display: flex;
  min-width: 0;
  min-height: 325px;
  flex-direction: column;
  align-items: flex-start;
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  transition:
    border-color 180ms ease,
    transform 180ms ease,
    box-shadow 180ms ease;
}

.resource-card:hover {
  transform: translateY(-3px);
  border-color: rgb(23 107 99 / 45%);
  box-shadow: var(--shadow-soft);
}

.resource-featured {
  border-top: 3px solid var(--teal);
  padding-top: calc(1.5rem - 2px);
}

.card-topline {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
}

.card-label,
.citation-label,
.panel-label {
  color: var(--muted);
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.card-version {
  padding: 0.18rem 0.45rem;
  border-radius: 3px;
  background: var(--teal-pale);
  color: var(--teal-dark);
  font-size: 0.68rem;
  font-weight: 750;
}

.card-icon {
  display: grid;
  width: 43px;
  height: 43px;
  place-items: center;
  margin-top: 1.6rem;
  margin-bottom: 1.2rem;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--teal);
  font-size: 1.2rem;
}

.card-icon-text {
  font-size: 0.9rem;
  font-weight: 750;
}

.resource-card h3 {
  margin-bottom: 0.65rem;
}

.resource-card > p {
  margin-bottom: 1.3rem;
  font-size: 0.88rem;
  line-height: 1.75;
}

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

.format-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: auto;
}

.format-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.42rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--ink);
  font-size: 0.75rem;
  font-weight: 700;
}

.format-links a span {
  color: var(--muted);
  font-size: 0.61rem;
  font-weight: 500;
}

.format-links a:hover {
  border-color: var(--teal);
  color: var(--teal);
}

/* Releases */

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

.release-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 1.6rem 0;
  border-bottom: 1px solid var(--line);
}

.release-version {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.release-indicator {
  width: 10px;
  height: 10px;
}

.release-indicator-old {
  background: #a8b4ad;
}

.release-version h3 {
  margin-bottom: 0.2rem;
  font-size: 1.1rem;
}

.release-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.release-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.5rem;
}

.release-actions a {
  padding: 0.45rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: rgb(255 255 255 / 50%);
  color: var(--ink-soft);
  font-size: 0.76rem;
  font-weight: 650;
}

.release-actions a:hover {
  border-color: var(--teal);
  color: var(--teal);
}

.version-footnote {
  margin: 1.25rem 0 0;
  color: var(--muted);
  font-size: 0.82rem;
}

/* Research and alignments */

.section-research {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.85fr);
  align-items: start;
  gap: clamp(2.5rem, 7vw, 6rem);
  background: #eef1eb;
}

.research-copy h2 {
  max-width: 520px;
}

.research-copy > p:not(.eyebrow) {
  max-width: 520px;
  font-size: 0.97rem;
}

.research-copy .text-link {
  margin-top: 0.5rem;
}

.research-panel {
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.panel-label {
  margin-bottom: 1rem;
}

.research-panel ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.research-panel li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.83rem;
  font-weight: 650;
}

.alignment-tag {
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 500;
  text-align: right;
}

.panel-footnote {
  margin: 1rem 0 0;
  font-size: 0.78rem;
  line-height: 1.7;
}

/* Citation */

.citation-section {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  align-items: center;
  gap: clamp(2rem, 6vw, 5rem);
  padding: clamp(4rem, 8vw, 6.5rem) var(--page-gutter);
}

.citation-section h2 {
  margin-bottom: 1rem;
}

.citation-section > div:first-child > p:last-child {
  max-width: 330px;
  margin-bottom: 0;
  font-size: 0.92rem;
}

.citation-card {
  padding: 1.75rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal);
  border-radius: var(--radius);
  background: var(--surface);
}

.citation-label {
  margin-bottom: 1rem;
}

.citation-text {
  margin-bottom: 1.2rem;
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.1rem;
  line-height: 1.7;
}

.doi-link {
  color: var(--teal);
  font-size: 0.82rem;
  font-weight: 700;
  overflow-wrap: anywhere;
}

/* Closing banner */

.closing-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: clamp(2rem, 5vw, 3.5rem) var(--page-gutter);
  background: var(--navy);
  color: white;
}

.closing-banner .eyebrow {
  margin-bottom: 0.8rem;
  color: #a5d5c5;
}

.closing-banner h2 {
  max-width: 570px;
  margin-bottom: 0;
  font-size: clamp(1.8rem, 3.4vw, 2.7rem);
}

.button-light {
  flex-shrink: 0;
  background: #f7f7f2;
  color: var(--navy);
}

.button-light:hover {
  background: #dcece5;
  color: var(--navy);
}

/* Footer */

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.5rem var(--page-gutter) 2rem;
}

.footer-brand {
  font-size: 0.8rem;
}

.site-footer > p {
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem;
}

.footer-links a {
  color: var(--ink-soft);
  font-size: 0.78rem;
}

.footer-links a:hover {
  color: var(--teal);
}

/* Responsive layout */

@media (max-width: 850px) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 2.5rem;
    padding-top: 4.5rem;
  }

  .hero-copy {
    max-width: 700px;
  }

  .hero-visual {
    width: min(100%, 360px);
  }

  .principles {
    gap: 1.2rem;
  }

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

  .resource-card:last-child {
    grid-column: 1 / -1;
    min-height: 250px;
  }

  .section-heading-wide {
    align-items: start;
    flex-direction: column;
    gap: 1rem;
  }

  .section-description {
    max-width: 600px;
  }

  .section-research {
    grid-template-columns: minmax(0, 1fr);
  }

  .research-panel {
    width: 100%;
  }

  .citation-section {
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
  }

  .citation-section > div:first-child > p:last-child {
    max-width: 600px;
  }
}

@media (max-width: 600px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 1rem;
  }

  .main-nav {
    width: 100%;
    flex-wrap: wrap;
    gap: 0.65rem 1.1rem;
  }

  .main-nav a {
    font-size: 0.8rem;
  }

  .main-nav .nav-external {
    padding: 0.2rem 0.5rem;
  }

  .hero {
    min-height: auto;
    padding-top: 3.5rem;
    padding-bottom: 3.5rem;
  }

  h1 {
    font-size: clamp(2.75rem, 12vw, 4rem);
  }

  .hero-intro {
    font-size: 1rem;
  }

  .hero-meta {
    line-height: 1.8;
  }

  .principles {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.5rem;
    padding-top: 1.75rem;
    padding-bottom: 1.75rem;
  }

  .principle p {
    max-width: 400px;
  }

  .section {
    padding-top: 4rem;
    padding-bottom: 4rem;
  }

  .about-content {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.5rem;
  }

  .resource-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .resource-card,
  .resource-card:last-child {
    grid-column: auto;
    min-height: 280px;
  }

  .release-row {
    align-items: flex-start;
    flex-direction: column;
    gap: 1rem;
  }

  .release-actions {
    justify-content: flex-start;
  }

  .release-actions a {
    font-size: 0.75rem;
  }

  .research-panel {
    padding: 1.1rem;
  }

  .research-panel li {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.2rem;
  }

  .alignment-tag {
    text-align: left;
  }

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

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.7rem;
  }

  .footer-links {
    gap: 1rem;
  }
}

/* Respect reduced-motion preferences */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}