:root {
  --ink: #24231d;
  --ink-soft: #5c5747;
  --paper: #f6f1e7;
  --paper-raised: #ffffff;
  --paper-line: #e3d9c4;
  --ochre: #be8a3d;
  --ochre-dark: #a1732f;
  --on-ink: #f6f1e7;
  --shadow: 0 2px 0 rgba(28, 27, 20, 0.04);
  --max-width: 1160px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #eae6da;
    --ink-soft: #b3ad9c;
    --paper: #15140f;
    --paper-raised: #1c1b15;
    --paper-line: #3a3728;
    --ochre: #d7a355;
    --ochre-dark: #e6b56b;
    --on-ink: #15140f;
  }
}

* { box-sizing: border-box; }

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: var(--ochre);
  z-index: 300;
}

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

html, body { overflow-x: hidden; }

body {
  margin: 0;
  font-family: 'IBM Plex Sans', sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  font-size: 16px;
  width: 100%;
}

h1, h2, h3, .logo {
  font-family: 'Fraunces', serif;
  font-weight: 550;
  color: var(--ink);
  margin: 0;
  text-wrap: balance;
}

a { color: inherit; }
img { max-width: 100%; display: block; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  color: var(--ochre-dark);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: 0.75rem;
  margin: 0 0 12px;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  line-height: 1.25;
  margin-bottom: 22px;
  max-width: 34ch;
}

.center { text-align: center; margin-left: auto; margin-right: auto; }

a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--ochre);
  outline-offset: 3px;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 14px 26px;
  border-radius: 3px;
  font-family: 'IBM Plex Sans', sans-serif;
  font-weight: 600;
  font-size: 0.92rem;
  border: 1px solid transparent;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
  text-decoration: none;
}

.btn-primary {
  background: var(--ink);
  color: var(--paper);
}
.btn-primary:hover { background: var(--ochre-dark); }

.btn-ghost {
  border-color: var(--ink-soft);
  color: var(--ink);
}
.btn-ghost:hover { border-color: var(--ink); background: var(--paper-raised); }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(6px);
  z-index: 100;
  border-bottom: 1px solid var(--paper-line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-top: 18px;
  padding-bottom: 18px;
}

.logo {
  font-size: 1.3rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}

.main-nav {
  display: flex;
  gap: 30px;
  margin-right: auto;
  margin-left: 48px;
}

.main-nav a {
  position: relative;
  font-weight: 500;
  font-size: 0.95rem;
  text-decoration: none;
  color: var(--ink-soft);
  padding-bottom: 5px;
  transition: color 0.15s ease;
}
.main-nav a:hover { color: var(--ink); }

.main-nav a.active { color: var(--ink); }
.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--ochre);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--ink);
  display: block;
}

/* Reveal on scroll */
.reveal {
  opacity: 1;
  transform: none;
}
.reveal.pending {
  opacity: 0;
  transform: translateY(14px);
}
.reveal.in-view {
  animation: rise 0.6s ease forwards;
}
@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Hero */
.hero { padding: 88px 0 96px; position: relative; overflow: hidden; }

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    to bottom,
    transparent,
    transparent 41px,
    color-mix(in srgb, var(--paper-line) 70%, transparent) 42px
  );
  -webkit-mask-image: linear-gradient(to bottom, black 0%, black 55%, transparent 92%);
  mask-image: linear-gradient(to bottom, black 0%, black 55%, transparent 92%);
  pointer-events: none;
}

.hero-grid { position: relative; }

.hero-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 64px;
  align-items: start;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 2.85rem);
  line-height: 1.18;
  margin-bottom: 22px;
}

.hero-lead {
  font-size: 1.08rem;
  color: var(--ink-soft);
  max-width: 52ch;
  margin: 0 0 34px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* Ledger card (hero) */
.ledger-card {
  background: var(--paper-raised);
  border: 1px solid var(--paper-line);
  border-radius: 4px;
  padding: 30px 28px 26px;
  margin-top: 6px;
}

.ledger-card-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 18px;
}

.ledger-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px solid var(--paper-line);
  font-size: 0.95rem;
}
.ledger-row:first-of-type { padding-top: 0; }

.ledger-key { color: var(--ink-soft); min-width: 0; }
.ledger-val {
  font-family: 'IBM Plex Mono', monospace;
  font-weight: 500;
  text-align: right;
  min-width: 0;
}

.ledger-total {
  border-bottom: 3px double var(--ink);
  font-weight: 600;
  padding-bottom: 15px;
}
.ledger-total .ledger-key { color: var(--ink); }

/* Key figures */
.stats { padding: 8px 0 0; }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  border-top: 1px solid var(--paper-line);
  border-bottom: 1px solid var(--paper-line);
  padding: 40px 0;
}

.stat { text-align: center; }

.stat-number {
  display: block;
  font-family: 'IBM Plex Mono', monospace;
  font-variant-numeric: tabular-nums;
  font-size: clamp(2rem, 4vw, 2.6rem);
  font-weight: 500;
  color: var(--ink);
  line-height: 1;
  margin-bottom: 10px;
}

.stat-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

@media (max-width: 720px) {
  .stats-grid { grid-template-columns: 1fr; gap: 24px; padding: 28px 0; }
}

/* Reference tabs */
.ref-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 48px;
  border-bottom: 1px solid var(--paper-line);
}

.ref-tab {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 0.92rem;
  font-weight: 500;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  padding: 13px 4px;
  margin-right: 28px;
  color: var(--ink-soft);
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.ref-tab:hover { color: var(--ink); }
.ref-tab.active { color: var(--ink); border-bottom-color: var(--ochre); }

.ref-panels { padding-top: 8px; }
.ref-panel[hidden] { display: none; }

.ref-entry {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--paper-line);
}
.ref-entry:first-child { }

.ref-name { font-weight: 600; }
.ref-meta {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.85rem;
  color: var(--ink-soft);
  white-space: nowrap;
  text-align: right;
}

@media (max-width: 560px) {
  .ref-entry { flex-direction: column; gap: 4px; }
  .ref-meta { text-align: left; }
}

/* Timeline */
.timeline-section { padding: 90px 0; }

.timeline { margin-top: 52px; }

.timeline-track {
  display: flex;
  justify-content: space-between;
  position: relative;
  padding: 0 4px 28px;
}

.timeline-line {
  position: absolute;
  top: 8px;
  left: calc(100% / 12);
  right: calc(100% / 12);
  height: 2px;
  display: flex;
}

.timeline-segment {
  flex: 1;
  position: relative;
  background: var(--paper-line);
  margin-right: 3px;
  overflow: hidden;
}
.timeline-segment:last-child { margin-right: 0; }

.timeline-fill {
  position: absolute;
  inset: 0;
  width: 0%;
  background: var(--ochre-dark);
}
.timeline-fill.filled { width: 100%; }
.timeline-fill.filling {
  animation: timeline-fill-anim var(--segment-duration, 4000ms) linear forwards;
}
.timeline:hover .timeline-fill.filling,
.timeline:focus-within .timeline-fill.filling {
  animation-play-state: paused;
}

@keyframes timeline-fill-anim {
  from { width: 0%; }
  to { width: 100%; }
}

.timeline-node {
  position: relative;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 0;
  flex: 1;
}

.timeline-node::before {
  content: "";
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--paper-raised);
  border: 2px solid var(--paper-line);
  transition: border-color 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
}

.timeline-node.active::before {
  border-color: var(--ochre-dark);
  background: var(--ochre-dark);
  transform: scale(1.15);
}

.timeline-year {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.8rem;
  color: var(--ink-soft);
  text-align: center;
  white-space: nowrap;
  transition: color 0.2s ease;
}
.timeline-node:hover .timeline-year { color: var(--ink); }
.timeline-node.active .timeline-year { color: var(--ink); font-weight: 600; }

.timeline-detail {
  border-top: 1px solid var(--paper-line);
  padding-top: 28px;
  min-height: 3.2em;
}
.timeline-detail p {
  margin: 0;
  font-size: 1.05rem;
  max-width: 62ch;
}

@media (max-width: 640px) {
  .timeline-track {
    flex-direction: column;
    align-items: stretch;
    gap: 22px;
    padding: 4px 0;
  }
  .timeline-line {
    left: 8px;
    right: auto;
    top: calc(100% / 12);
    bottom: calc(100% / 12);
    width: 2px;
    height: auto;
    flex-direction: column;
  }
  .timeline-segment { margin-right: 0; margin-bottom: 3px; }
  .timeline-segment:last-child { margin-bottom: 0; }
  .timeline-node {
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 16px;
  }
  .timeline-year { text-align: left; }
}

/* Services — ledger list */
.services { padding: 90px 0; }

.ledger-list {
  margin-top: 52px;
  border-top: 1px solid var(--paper-line);
}

.ledger-item {
  display: grid;
  grid-template-columns: 44px 40px 1fr;
  align-items: start;
  gap: 20px;
  padding: 30px 0;
  border-bottom: 1px solid var(--paper-line);
  transition: background-color 0.2s ease;
}
.ledger-item:hover { background: color-mix(in srgb, var(--paper-line) 30%, transparent); }

.ledger-code {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.95rem;
  color: var(--ochre-dark);
  font-weight: 500;
  padding-top: 8px;
}

.ledger-icon {
  width: 34px;
  height: 34px;
  color: var(--ochre-dark);
  margin-top: 2px;
}
.ledger-icon svg { width: 100%; height: 100%; }

.ledger-item h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.ledger-item p {
  color: var(--ink-soft);
  margin: 0;
  max-width: 62ch;
}

/* About */
.about { padding: 90px 0; }

.about-inner {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 56px;
  align-items: start;
}

.about-photo {
  aspect-ratio: 4 / 5;
  border-radius: 4px;
  background:
    linear-gradient(160deg, var(--ink) 0%, color-mix(in srgb, var(--ink) 60%, var(--ochre)) 100%);
  border: 1px solid var(--paper-line);
}

.about-role {
  font-family: 'IBM Plex Mono', monospace;
  color: var(--ochre-dark);
  font-size: 0.9rem;
  margin: 0 0 20px;
}

.about-facts {
  margin: 28px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--paper-line);
  display: grid;
  gap: 14px;
}
.about-facts div { display: grid; grid-template-columns: 90px 1fr; gap: 16px; }
.about-facts dt {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  margin: 0;
}
.about-facts dd { margin: 0; }

/* Why — check list */
.why { padding: 90px 0; }

.check-list {
  list-style: none;
  margin: 48px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--paper-line);
  border-left: 1px solid var(--paper-line);
}

.check-list li {
  padding: 30px 32px;
  border-right: 1px solid var(--paper-line);
  border-bottom: 1px solid var(--paper-line);
  position: relative;
  padding-left: 52px;
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 20px;
  top: 30px;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: color-mix(in srgb, var(--ochre) 20%, transparent);
  color: var(--ochre-dark);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.8rem;
  font-weight: 600;
}

.check-list h3 { font-size: 1.05rem; margin-bottom: 8px; }
.check-list p { color: var(--ink-soft); margin: 0; }

/* Contact */
.contact {
  padding: 90px 0;
  background: var(--ink);
  color: var(--on-ink);
}
.contact .section-title { color: var(--on-ink); }
.contact .eyebrow { color: var(--ochre); }
.contact-info > p { color: color-mix(in srgb, var(--on-ink) 70%, transparent); }

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
}

.contact-block { margin-top: 26px; }
.contact-block h3 {
  font-family: 'IBM Plex Mono', monospace;
  color: var(--ochre);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}
.contact-block p { margin: 0; color: color-mix(in srgb, var(--on-ink) 85%, transparent); }
.contact-block a { color: var(--on-ink); text-decoration: underline; text-underline-offset: 3px; }

.contact-form {
  background: repeating-linear-gradient(
    var(--paper-raised),
    var(--paper-raised) 38px,
    color-mix(in srgb, var(--paper-line) 55%, transparent) 39px
  );
  background-color: var(--paper-raised);
  border-radius: 4px;
  padding: 34px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-form label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--ink);
}

.contact-form input,
.contact-form textarea {
  border: 1px solid var(--paper-line);
  border-radius: 3px;
  padding: 12px 13px;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 0.95rem;
  color: var(--ink);
  background: var(--paper-raised);
}
.contact-form textarea { resize: vertical; }

.contact-form button {
  align-self: flex-start;
  cursor: pointer;
}

/* Footer */
.site-footer {
  background: var(--ink);
  color: color-mix(in srgb, var(--on-ink) 55%, transparent);
  padding: 28px 0;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.78rem;
  border-top: 1px solid color-mix(in srgb, var(--on-ink) 15%, transparent);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}
.footer-inner p { margin: 0; }

/* Responsive */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .about-inner { grid-template-columns: 1fr; }
  .about-photo { max-width: 240px; }
  .contact-inner { grid-template-columns: 1fr; }
  .check-list { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .main-nav, .nav-cta { display: none; }
  .nav-toggle { display: flex; }

  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--paper-raised);
    padding: 20px 24px;
    gap: 16px;
    margin: 0;
    border-bottom: 1px solid var(--paper-line);
  }

  .hero { padding: 56px 0 48px; }
  .services, .about, .why, .contact, .timeline-section { padding: 56px 0; }

  .hero-actions { flex-direction: column; flex-wrap: nowrap; align-items: stretch; }
  .hero-actions .btn { text-align: center; }

  .ledger-card { padding: 24px 20px 20px; }

  .ledger-item { grid-template-columns: 34px 1fr; gap: 14px; padding: 24px 0; }
  .ledger-icon { display: none; }

  .about-facts div { grid-template-columns: 1fr; gap: 4px; }
  .about-facts dt { margin-top: 4px; }

  .contact-form { padding: 22px; }
}

@media (max-width: 420px) {
  .stat-number { font-size: 1.9rem; }
  .ref-tabs { gap: 4px; }
  .ref-tab { margin-right: 16px; font-size: 0.86rem; }
}