:root {
  --ink: #11140f;
  --paper: #f7f8f3;
  --muted: #666d60;
  --line: #1e221b;
  --soft: #e5e8dd;
  --white: #ffffff;
  --dark: #0d100c;
  --space: clamp(18px, 3vw, 44px);
  --radius: 28px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(17, 20, 15, .05) 1px, transparent 1px),
    linear-gradient(180deg, rgba(17, 20, 15, .05) 1px, transparent 1px),
    var(--paper);
  background-size: 56px 56px;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.55;
}

a {
  color: inherit;
}

img {
  display: block;
  width: 100%;
  height: auto;
}

.grid-keeper {
  width: min(1160px, calc(100% - 32px));
  margin-inline: auto;
}

.vault-rail {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(247, 248, 243, .92);
  backdrop-filter: blur(18px);
}

.rail-matrix {
  min-height: 78px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
}

.mark-node {
  text-decoration: none;
  letter-spacing: -.05em;
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 780;
}

.route-stack {
  justify-self: end;
  display: grid;
  grid-auto-flow: column;
  gap: 10px;
  align-items: center;
}

.route-stack a {
  text-decoration: none;
  font-size: 13px;
  letter-spacing: .08em;
  text-transform: uppercase;
  border: 1px solid transparent;
  padding: 10px 12px;
}

.route-stack a:hover,
.route-stack a:focus-visible {
  border-color: var(--line);
  outline: none;
}

.switch-core {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  overflow: hidden;
  clip-path: inset(50%);
}

.trigger-action {
  display: none;
  justify-self: end;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  place-items: center;
  padding: 10px;
  cursor: pointer;
}

.trigger-action span {
  display: block;
  width: 20px;
  height: 1px;
  background: var(--ink);
  margin: 4px 0;
}

.hero-sector {
  min-height: calc(100svh - 78px);
  padding: clamp(64px, 9vw, 120px) 0;
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(340px, 1.05fr);
  gap: var(--space);
  align-items: center;
}

.hero-copy {
  display: grid;
  gap: 24px;
}

.micro-line {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
}

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

h1,
h2 {
  letter-spacing: -.065em;
  line-height: .96;
}

h1 {
  margin-bottom: 0;
  font-size: clamp(48px, 8vw, 104px);
  max-width: 10ch;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(34px, 5.4vw, 74px);
}

h3 {
  margin-bottom: 12px;
  letter-spacing: -.03em;
  font-size: 20px;
}

.lead-line {
  max-width: 620px;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 21px);
}

.action-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, max-content));
  gap: 12px;
}

.outline-command {
  display: inline-grid;
  place-items: center;
  min-height: 48px;
  padding: 0 20px;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: -.01em;
}

.outline-command:hover,
.outline-command:focus-visible {
  background: var(--ink);
  color: var(--paper);
  outline: none;
}

.ghost-link {
  color: var(--muted);
}

.visual-frame,
.thin-image {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--white);
  box-shadow: 18px 18px 0 var(--ink);
}

.logic-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  margin-bottom: clamp(80px, 12vw, 140px);
}

.metric-cell {
  min-height: 260px;
  display: grid;
  align-content: space-between;
  gap: 28px;
  padding: clamp(24px, 3.5vw, 40px);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(247, 248, 243, .9);
}

.metric-cell span {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: .18em;
}

.metric-cell p {
  margin-bottom: 0;
  color: var(--muted);
}

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

.dark-cell p,
.dark-cell span {
  color: #cfd4c5;
}

.split-array,
.panel-grid,
.community-grid,
.quote-sector,
.question-zone,
.contact-grid {
  padding: clamp(76px, 11vw, 140px) 0;
  border-top: 1px solid var(--line);
}

.split-array {
  display: grid;
  grid-template-columns: .72fr 1.28fr;
  gap: var(--space);
  align-items: start;
}

.section-tag {
  display: grid;
  gap: 18px;
  position: sticky;
  top: 110px;
}

.feature-matrix {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.data-card {
  min-height: 220px;
  padding: clamp(22px, 3vw, 34px);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(247, 248, 243, .85);
}

.data-card p,
.guide-panel li,
.community-copy p,
.quote-card p,
.query-unit p,
.contact-copy p {
  color: var(--muted);
}

.panel-grid,
.community-grid {
  display: grid;
  grid-template-columns: .92fr 1.08fr;
  gap: var(--space);
  align-items: center;
}

.guide-panel {
  display: grid;
  gap: 24px;
}

.sequence-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  counter-reset: step;
}

.sequence-list li {
  position: relative;
  padding: 18px 18px 18px 58px;
  border: 1px solid var(--line);
  background: rgba(247, 248, 243, .9);
}

.sequence-list li::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 18px;
  top: 19px;
  color: var(--ink);
  font-size: 12px;
  letter-spacing: .1em;
}

.community-grid {
  grid-template-columns: 1.05fr .95fr;
}

.community-copy {
  display: grid;
  gap: 22px;
}

.note-stack {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.note-stack article {
  padding: 22px;
  border: 1px solid var(--line);
  background: rgba(247, 248, 243, .9);
}

.dark-image {
  box-shadow: -18px 18px 0 var(--ink);
}

.quote-sector {
  display: grid;
  grid-template-columns: .55fr 1.45fr;
  gap: var(--space);
}

.narrow-tag h2 {
  max-width: 8ch;
}

.quote-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.quote-card {
  min-height: 230px;
  display: grid;
  align-content: space-between;
  gap: 22px;
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--line);
  background: rgba(247, 248, 243, .9);
}

.quote-card strong {
  letter-spacing: -.02em;
}

.question-zone {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: var(--space);
}

.question-matrix {
  display: grid;
  gap: 10px;
}

.query-unit {
  border: 1px solid var(--line);
  background: rgba(247, 248, 243, .92);
}

.query-unit summary {
  padding: 22px;
  cursor: pointer;
  font-weight: 760;
  letter-spacing: -.02em;
}

.query-unit p {
  margin: 0;
  padding: 0 22px 22px;
}

.contact-grid {
  display: grid;
  grid-template-columns: .95fr 1.05fr;
  gap: var(--space);
  align-items: start;
}

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

.mail-line {
  display: inline-grid;
  width: fit-content;
  padding: 12px 16px;
  border: 1px solid var(--line);
  color: var(--ink) !important;
  font-weight: 760;
}

.form-shell {
  display: grid;
  gap: 12px;
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--line);
  background: rgba(247, 248, 243, .9);
}

.form-shell label {
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
}

.form-shell input,
.form-shell textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  padding: 14px 15px;
  font: inherit;
}

.form-shell input:focus,
.form-shell textarea:focus {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

.form-button {
  width: fit-content;
  margin-top: 6px;
}

.base-dock {
  color: var(--paper);
  background: var(--dark);
  border-top: 1px solid var(--dark);
}

.dock-grid {
  min-height: 190px;
  display: grid;
  place-items: center;
  gap: 24px;
  text-align: center;
}

.dock-grid p {
  margin: 0;
  color: var(--paper);
}

.base-dock ul {
  padding: 0;
}

.base-dock a:hover,
.base-dock a:focus-visible {
  text-decoration: underline !important;
  outline: none;
}

@media (max-width: 920px) {
  .rail-matrix {
    grid-template-columns: auto auto;
  }

  .trigger-action {
    display: grid;
  }

  .route-stack {
    grid-column: 1 / -1;
    justify-self: stretch;
    display: none;
    grid-auto-flow: row;
    grid-template-columns: 1fr;
    gap: 0;
    padding-bottom: 16px;
  }

  .switch-core:checked~.route-stack {
    display: grid;
  }

  .route-stack a {
    border-top: 1px solid var(--line);
    padding: 14px 0;
  }

  .hero-sector,
  .split-array,
  .panel-grid,
  .community-grid,
  .quote-sector,
  .question-zone,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .section-tag {
    position: static;
  }

  h1 {
    max-width: 11ch;
  }

  .visual-frame,
  .thin-image,
  .dark-image {
    box-shadow: 10px 10px 0 var(--ink);
  }
}

@media (max-width: 680px) {
  .grid-keeper {
    width: min(100% - 24px, 1160px);
  }

  .logic-strip,
  .feature-matrix,
  .quote-grid,
  .note-stack {
    grid-template-columns: 1fr;
  }

  .hero-sector {
    padding-top: 48px;
  }

  .action-grid {
    grid-template-columns: 1fr;
  }

  .outline-command,
  .form-button {
    width: 100%;
  }
}