:root {
  --bg: #f3f0e8;
  --paper: #fffdf8;
  --ink: #111111;
  --ink-soft: #4a4a46;
  --ink-muted: #74736d;
  --line: #111111;
  --line-soft: #d8d4cb;
  --surface: rgba(255, 255, 255, 0.72);
  --max: 1280px;
  --content: 760px;
  --gutter: 28px;
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.88), rgba(255, 255, 255, 0) 160px),
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.7), transparent 34%),
    var(--bg);
  font-family: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", "Times New Roman", "Songti SC", serif;
  line-height: 1.5;
}

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

a:hover {
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

code,
pre,
.mono,
button,
.section-kicker,
.eyebrow,
.nav,
.status-pill,
.chip,
.hero-stat-label,
.card-meta,
.footer {
  font-family: "SFMono-Regular", ui-monospace, Menlo, Monaco, "Cascadia Mono", monospace;
}

img,
svg {
  display: block;
  max-width: 100%;
}

button {
  color: inherit;
}

.site-shell {
  min-height: 100vh;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(12px);
  background: rgba(243, 240, 232, 0.84);
  border-bottom: 1px solid rgba(17, 17, 17, 0.14);
}

.topbar-inner,
.page,
.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.topbar-inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
}

.brand-mark {
  font-size: 0.84rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.brand-name {
  font-size: 1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

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

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

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.34rem 0.7rem;
  border: 1px solid var(--line);
  background: var(--paper);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status-pill::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink);
}

.page {
  padding-top: 26px;
  padding-bottom: 72px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(320px, 0.82fr);
  gap: 34px;
  align-items: end;
  padding-bottom: 34px;
  border-bottom: 1px solid rgba(17, 17, 17, 0.18);
}

.eyebrow,
.section-kicker,
.card-meta,
.hero-stat-label,
.list-kicker {
  margin: 0 0 12px;
  color: var(--ink-muted);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero-copy {
  max-width: 42rem;
}

.hero-title {
  margin: 0;
  max-width: 12ch;
  font-size: clamp(2.9rem, 8vw, 6.3rem);
  line-height: 0.93;
  letter-spacing: -0.06em;
}

.hero-lead {
  margin: 22px 0 0;
  max-width: 36rem;
  font-size: 1.08rem;
  color: var(--ink-soft);
}

.hero-support {
  margin: 12px 0 0;
  max-width: 40rem;
  font-size: 0.98rem;
  color: var(--ink-soft);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.button,
.ghost-button,
.copy-button,
.chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: background-color 140ms ease, color 140ms ease, transform 140ms ease;
}

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

.ghost-button,
.copy-button,
.chip {
  background: rgba(255, 255, 255, 0.48);
}

.button:hover,
.ghost-button:hover,
.copy-button:hover,
.chip:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.ghost-button:hover,
.copy-button:hover,
.chip:hover,
.chip.is-active {
  background: var(--ink);
  color: var(--paper);
}

.hero-side {
  display: grid;
  gap: 18px;
}

.signal-panel {
  position: relative;
  min-height: 420px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.84), rgba(255, 255, 255, 0.46)),
    var(--paper);
}

.signal-panel::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, transparent 0, rgba(17, 17, 17, 0.09) 50%, transparent 100%);
  transform: translateX(-100%);
  animation: scan 7.6s linear infinite;
}

.signal-panel svg {
  width: 100%;
  height: 100%;
}

@keyframes scan {
  to {
    transform: translateX(100%);
  }
}

.hero-stats {
  display: grid;
  gap: 10px;
}

.hero-stat {
  padding-top: 10px;
  border-top: 1px solid var(--line-soft);
}

.hero-stat p {
  margin: 0;
}

.hero-stat-value {
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.section {
  padding-top: 42px;
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 0.6fr);
  gap: 20px;
  align-items: end;
  margin-bottom: 22px;
}

.section-title {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.3rem);
  line-height: 0.98;
  letter-spacing: -0.05em;
}

.section-summary {
  margin: 0;
  max-width: 34rem;
  color: var(--ink-soft);
}

.framing-grid,
.principles-grid,
.patterns-grid,
.audit-grid,
.references-grid,
.architecture-grid {
  display: grid;
  gap: 16px;
}

.framing-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.principles-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

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

.architecture-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  padding: 18px;
  border: 1px solid rgba(17, 17, 17, 0.15);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.78), rgba(255, 255, 255, 0.52)),
    var(--paper);
}

.card h3,
.card h4 {
  margin: 0;
  font-size: 1.24rem;
  letter-spacing: -0.03em;
}

.card p {
  margin: 12px 0 0;
  color: var(--ink-soft);
}

.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: auto;
  padding-top: 18px;
}

.card .checklist,
.card .meta-list,
.contract-list,
.signal-list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.checklist li,
.meta-list li,
.contract-list li,
.signal-list li {
  display: flex;
  gap: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--line-soft);
  color: var(--ink-soft);
}

.checklist li::before,
.meta-list li::before,
.contract-list li::before,
.signal-list li::before {
  content: "01";
  flex: 0 0 auto;
  color: var(--ink-muted);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

.checklist li:nth-child(2)::before,
.meta-list li:nth-child(2)::before,
.contract-list li:nth-child(2)::before,
.signal-list li:nth-child(2)::before {
  content: "02";
}

.checklist li:nth-child(3)::before,
.meta-list li:nth-child(3)::before,
.contract-list li:nth-child(3)::before,
.signal-list li:nth-child(3)::before {
  content: "03";
}

.checklist li:nth-child(4)::before,
.meta-list li:nth-child(4)::before,
.contract-list li:nth-child(4)::before,
.signal-list li:nth-child(4)::before {
  content: "04";
}

.checklist li:nth-child(5)::before,
.meta-list li:nth-child(5)::before,
.contract-list li:nth-child(5)::before,
.signal-list li:nth-child(5)::before {
  content: "05";
}

.status-tag {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  margin-top: 16px;
  padding: 0.35rem 0.6rem;
  border: 1px solid var(--line);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.timeline-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.timeline-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.timeline-item-year {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.timeline-item h3 {
  margin-top: 10px;
}

.contract-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 0.72fr);
  gap: 18px;
}

.contract-panel {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #111111;
  color: #f7f4ee;
}

.contract-panel pre {
  margin: 0;
  overflow: auto;
  font-size: 0.84rem;
  line-height: 1.6;
}

.copy-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.copy-row p {
  margin: 0;
  color: rgba(247, 244, 238, 0.72);
}

.signal-panel-inline {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.44);
}

.signal-panel-inline h3 {
  margin: 0;
  font-size: 1.18rem;
}

.footer {
  border-top: 1px solid rgba(17, 17, 17, 0.18);
}

.footer-inner {
  padding-top: 18px;
  padding-bottom: 26px;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  color: var(--ink-soft);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

@media (max-width: 1080px) {
  .hero,
  .section-head,
  .contract-section {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 760px) {
  :root {
    --gutter: 18px;
    --radius: 14px;
  }

  .topbar-inner {
    min-height: auto;
    align-items: flex-start;
    padding-top: 14px;
    padding-bottom: 14px;
    flex-direction: column;
  }

  .nav {
    flex-wrap: wrap;
    gap: 10px 14px;
  }

  .hero {
    gap: 22px;
    padding-bottom: 22px;
  }

  .hero-title,
  .section-title {
    max-width: none;
  }

  .framing-grid,
  .principles-grid,
  .patterns-grid,
  .audit-grid,
  .timeline-grid,
  .references-grid,
  .architecture-grid {
    grid-template-columns: 1fr;
  }

  .signal-panel {
    min-height: 300px;
  }

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