/* ============================================================
   Technomark LS — private outreach concept
   Aesthetic: "private placement memorandum" — cream paper,
   blue-black ink, bridge-lamp brass. Palette derived from the
   client's own dusk bridge photography (see SOURCES.md).
   Type: Libre Caslon Display (London typographic heritage)
   + Public Sans (regulatory precision).
   ============================================================ */

:root {
  /* ink — blue-black, hue from the blue-hour photography */
  --ink: oklch(24% 0.035 255);
  --ink-deep: oklch(18% 0.032 255);
  --ink-soft: oklch(33% 0.025 255);
  --ink-muted: oklch(46% 0.018 255);

  /* paper — warm cream, tinted toward lamp brass */
  --paper: oklch(96.5% 0.009 85);
  --paper-deep: oklch(93.5% 0.012 85);
  --paper-on-ink: oklch(95% 0.012 85);
  --paper-dim-on-ink: oklch(80% 0.02 85);

  /* brass — bridge lamplight */
  --brass: oklch(47% 0.095 70);        /* on paper, AA at small sizes */
  --brass-bright: oklch(76% 0.085 80); /* on ink */
  --brass-line: oklch(62% 0.08 75);

  /* hairlines */
  --rule: oklch(86% 0.012 85);
  --rule-on-ink: oklch(38% 0.025 255);

  /* type */
  --serif: "Libre Caslon Display", "Libre Caslon Text", Georgia, serif;
  --serif-text: "Libre Caslon Text", Georgia, serif;
  --sans: "Public Sans", "Helvetica Neue", Arial, sans-serif;

  /* space — 4pt scale */
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 24px;
  --space-lg: 48px;
  --space-xl: 96px;

  --shell: 1160px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  font-size: 1.04rem;
  line-height: 1.65;
  color: var(--ink-soft);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

.shell {
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 48px);
}

h1, h2 {
  font-family: var(--serif);
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(2.45rem, 4.6vw + 0.9rem, 4.3rem);
  line-height: 1.08;
  max-width: 15ch;
  text-wrap: balance;
}

h2 {
  font-size: clamp(1.85rem, 2.2vw + 0.8rem, 2.7rem);
  line-height: 1.15;
  max-width: 22ch;
  text-wrap: balance;
}

h3 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.35rem;
  color: var(--ink);
}

p { max-width: 62ch; }

a { color: inherit; }

.eyebrow {
  font-family: var(--sans);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--brass);
  margin-bottom: var(--space-md);
}

.eyebrow-light { color: var(--brass-bright); }

/* over photography, brass fights the lamplit stone — use paper */
.hero .eyebrow-light { color: var(--paper-on-ink); }

.section-lead {
  font-size: 1.1rem;
  color: var(--ink-muted);
  max-width: 56ch;
}

/* ---------- buttons ---------- */

.btn {
  display: inline-block;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.92rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  padding: 14px 28px;
  transition: background-color 0.22s cubic-bezier(0.22, 1, 0.36, 1),
              color 0.22s cubic-bezier(0.22, 1, 0.36, 1),
              border-color 0.22s cubic-bezier(0.22, 1, 0.36, 1);
}

.btn-primary {
  background: var(--paper-on-ink);
  color: var(--ink);
}
.btn-primary:hover { background: var(--brass-bright); }

.btn-ghost {
  border: 1px solid oklch(70% 0.02 85 / 0.6);
  color: var(--paper-on-ink);
}
.btn-ghost:hover { border-color: var(--brass-bright); color: var(--brass-bright); }

.btn-header {
  background: var(--ink);
  color: var(--paper-on-ink);
  padding: 11px 22px;
  font-size: 0.85rem;
}
.btn-header:hover { background: var(--brass); }

:focus-visible {
  outline: 2px solid var(--brass-line);
  outline-offset: 3px;
}

/* ---------- header ---------- */

.site-header {
  position: absolute;
  inset-inline: 0;
  top: 0;
  z-index: 10;
  padding-block: 22px;
}

.header-row {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.wordmark {
  font-family: var(--serif);
  font-size: 1.5rem;
  color: var(--paper-on-ink);
  text-decoration: none;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
}
.wordmark-ls {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--brass-bright);
  transform: translateY(-1px);
}

.site-nav {
  display: flex;
  gap: clamp(18px, 2.4vw, 34px);
  margin-left: auto;
}
.site-nav a {
  font-size: 0.88rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--paper-dim-on-ink);
  transition: color 0.2s ease-out;
}
.site-nav a:hover { color: var(--paper-on-ink); }

.menu-toggle {
  display: none;
  background: none;
  border: 0;
  width: 40px;
  height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: flex-end;
  gap: 6px;
  cursor: pointer;
}
.menu-toggle span {
  display: block;
  height: 1.5px;
  background: var(--paper-on-ink);
}
.menu-toggle span:nth-child(1) { width: 24px; }
.menu-toggle span:nth-child(2) { width: 16px; }

/* ---------- hero ---------- */

.hero {
  position: relative;
  min-height: clamp(620px, 92vh, 820px);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  background: var(--ink-deep);
  overflow: hidden;
}

.hero-photo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 62% center;
}

.hero-scrim {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to bottom, oklch(18% 0.032 255 / 0.55) 0%, transparent 22%),
    linear-gradient(to right,
      oklch(18% 0.032 255 / 0.93) 0%,
      oklch(18% 0.032 255 / 0.8) 36%,
      oklch(18% 0.032 255 / 0.34) 64%,
      oklch(18% 0.032 255 / 0.08) 100%),
    linear-gradient(to top, oklch(18% 0.032 255 / 0.96) 0%,
      oklch(18% 0.032 255 / 0.55) 12%, transparent 30%);
}

.hero-content {
  position: relative;
  width: 100%;
  padding-top: 150px;
  padding-bottom: clamp(56px, 7vh, 88px);
}

.hero h1 {
  color: var(--paper-on-ink);
  margin-bottom: var(--space-md);
}

.hero-sub {
  color: var(--paper-dim-on-ink);
  font-size: 1.08rem;
  line-height: 1.75;
  max-width: 50ch;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

/* proof strip — horizontal label/value cells, rule-separated */
.hero-proof {
  position: relative;
  background: oklch(17% 0.032 255 / 0.68);
  border-top: 1px solid var(--rule-on-ink);
}

.proof-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  width: 100%;
}

.proof-cell {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-block: 20px;
}
.proof-cell + .proof-cell {
  border-left: 1px solid var(--rule-on-ink);
  padding-left: clamp(16px, 3vw, 40px);
}

.proof-value {
  font-family: var(--serif);
  font-size: clamp(1.25rem, 1.4vw + 0.7rem, 1.7rem);
  color: var(--paper-on-ink);
  line-height: 1.1;
}

.proof-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brass-bright);
}

/* ---------- bridge motif divider ---------- */

.bridge-divider {
  color: var(--brass-line);
  opacity: 0.45;
  max-width: var(--shell);
  margin: var(--space-lg) auto 0;
  padding-inline: clamp(20px, 4vw, 48px);
}
.bridge-divider svg { display: block; width: 100%; height: auto; }

/* ---------- sections ---------- */

.section { padding-block: clamp(64px, 9vw, 120px); }

/* mandate */
.mandate-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(40px, 6vw, 96px);
  align-items: start;
}

.mandate-copy p + p { margin-top: 18px; }
.mandate-copy h2 { margin-bottom: 22px; }

.terms-table { margin-top: 14px; }

.terms-row {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 16px;
  padding-block: 16px;
  border-top: 1px solid var(--rule);
}
.terms-row:last-child { border-bottom: 1px solid var(--rule); }

.terms-row dt {
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brass);
  padding-top: 3px;
}
.terms-row dd {
  font-size: 0.95rem;
  color: var(--ink-soft);
  line-height: 1.5;
}

/* model */
.section-model { background: var(--paper-deep); }

.model-head { margin-bottom: clamp(40px, 5vw, 64px); }
.model-head h2 { margin-bottom: 18px; }

.model-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(28px, 4vw, 64px);
}

.model-list li {
  padding-top: 20px;
  border-top: 1px solid var(--brass-line);
}

.model-numeral {
  font-family: var(--serif-text);
  font-style: italic;
  font-size: 1.1rem;
  color: var(--brass);
  display: block;
  margin-bottom: 10px;
}

.model-list h3 { margin-bottom: 10px; }
.model-list p { font-size: 0.95rem; line-height: 1.6; color: var(--ink-muted); }

/* track record — ink band */
.section-track {
  background: var(--ink);
  color: var(--paper-dim-on-ink);
}

.section-track h2 { color: var(--paper-on-ink); }
.section-track .section-lead { color: var(--paper-dim-on-ink); }
.track-head { margin-bottom: clamp(40px, 5vw, 60px); }
.track-head h2 { margin-bottom: 18px; }

.ledger {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: clamp(48px, 6vw, 96px);
  row-gap: 0;
}

.ledger li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-block: 17px;
  border-bottom: 1px solid var(--rule-on-ink);
}

.ledger-co {
  font-family: var(--serif);
  font-size: 1.12rem;
  color: var(--paper-on-ink);
  white-space: nowrap;
}

.ledger-dots {
  flex: 1;
  border-bottom: 1px dotted oklch(48% 0.025 255);
  transform: translateY(-4px);
}

.ledger-buyer {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--brass-bright);
  white-space: nowrap;
}

.coinvestors {
  margin-top: clamp(36px, 4vw, 52px);
  font-size: 0.92rem;
  line-height: 1.7;
  max-width: 72ch;
  color: var(--paper-dim-on-ink);
}
.coinvestors-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brass-bright);
  margin-bottom: 6px;
}

/* footprint */
.footprint-head { margin-bottom: clamp(36px, 4vw, 56px); }
.footprint-head h2 { margin-bottom: 14px; }

.footprint-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
}

.footprint-tile {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--ink-deep);
}

.footprint-tile img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}
.footprint-tile:hover img { transform: scale(1.04); }

.footprint-tile figcaption {
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  padding: 28px 16px 12px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--paper-on-ink);
  background: linear-gradient(to top, oklch(18% 0.032 255 / 0.92), transparent);
}

/* contact — deep ink band */
.section-contact {
  background: var(--ink-deep);
  color: var(--paper-dim-on-ink);
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(40px, 6vw, 96px);
  align-items: start;
}

.contact-copy h2 { color: var(--paper-on-ink); margin-bottom: 18px; }
.contact-copy p { margin-bottom: 30px; max-width: 44ch; }

.contact-offices {
  display: grid;
  gap: var(--space-lg);
  padding-top: 8px;
}

.office h3 {
  color: var(--brass-bright);
  font-size: 1.2rem;
  margin-bottom: 8px;
}
.office p { font-size: 0.92rem; line-height: 1.6; }

/* ---------- footer ---------- */

.site-footer {
  background: var(--ink-deep);
  border-top: 1px solid var(--rule-on-ink);
  padding-block: 26px;
}

.footer-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-sm);
}

.wordmark-footer { font-size: 1.15rem; }

.footer-note {
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: oklch(62% 0.02 255);
}

/* ============================================================
   responsive
   ============================================================ */

@media (max-width: 920px) {
  .mandate-grid,
  .contact-grid { grid-template-columns: 1fr; gap: var(--space-lg); }

  .model-list { grid-template-columns: 1fr; gap: var(--space-md); }
  .model-list li { padding-top: 16px; }

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

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

  .contact-offices { grid-template-columns: 1fr 1fr; gap: var(--space-md); }
}

@media (max-width: 720px) {
  .site-nav, .btn-header { display: none; }
  .menu-toggle { display: flex; margin-left: auto; }

  .hero { min-height: 88vh; }
  .hero-photo { object-position: 55% center; }
  .hero-content { padding-top: 120px; }

  .eyebrow-detail { display: none; }

  /* photo is brighter behind full-width mobile text — deepen scrim */
  .hero-scrim {
    background:
      linear-gradient(to bottom, oklch(18% 0.032 255 / 0.6) 0%, transparent 26%),
      oklch(18% 0.032 255 / 0.55),
      linear-gradient(to right,
        oklch(18% 0.032 255 / 0.8) 0%,
        oklch(18% 0.032 255 / 0.55) 50%,
        oklch(18% 0.032 255 / 0.45) 100%),
      linear-gradient(to top, oklch(18% 0.032 255 / 0.96) 0%,
        oklch(18% 0.032 255 / 0.6) 14%, transparent 34%);
  }

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

  /* proof stays horizontal — compact 3-up per outreach rules */
  .proof-cell { padding-block: 14px; }
  .proof-cell + .proof-cell { padding-left: 14px; }
  .proof-value { font-size: 1.1rem; }
  .proof-label { font-size: 0.58rem; letter-spacing: 0.09em; }

  .bridge-divider { margin-top: var(--space-md); }

  .footprint-grid { gap: 8px; }
  .footprint-tile figcaption { font-size: 0.66rem; padding: 20px 10px 8px; }
}

@media (max-width: 460px) {
  .hero-actions .btn { padding: 13px 20px; font-size: 0.86rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}