/* ============================================================
   PALIMPSEST — the city beneath the city
   Editorial broadsheet / archive art direction.
   Paper, ink, verdigris, rust. Plates, marginalia, double rules.
   ============================================================ */

:root {
  --paper: #f2ecdc;
  --paper-deep: #e9e0cb;
  --ink: #211a0f;
  --ink-soft: #4d4536;
  --ink-faint: #847a64;
  --verdigris: #2e5b4f;
  --verdigris-deep: #20443b;
  --rust: #9e3b25;
  --rule: #211a0f;
  --rule-soft: rgba(33, 26, 15, 0.28);
  --rule-faint: rgba(33, 26, 15, 0.14);
  --gold: #8a6b2f;
  --measure: 68ch;
  --serif-display: 'Playfair Display', 'Iowan Old Style', Georgia, serif;
  --serif-text: 'Newsreader', 'Iowan Old Style', Georgia, serif;
  --mono: 'IBM Plex Mono', 'SF Mono', Menlo, monospace;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif-text);
  font-size: 19px;
  line-height: 1.62;
  text-rendering: optimizeLegibility;
  /* paper grain + faint edge vignette, built from CSS only */
  background-image:
    radial-gradient(ellipse at 50% -10%, rgba(255, 252, 242, 0.9), rgba(255, 252, 242, 0) 55%),
    repeating-linear-gradient(0deg, rgba(33,26,15,0.012) 0 1px, transparent 1px 3px);
}

::selection { background: var(--verdigris); color: var(--paper); }

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

a { color: var(--verdigris-deep); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--rust); }

:focus-visible {
  outline: 2.5px solid var(--rust);
  outline-offset: 3px;
  border-radius: 1px;
}

/* ---------- shared primitives ---------- */

.wrap { max-width: 1180px; margin-inline: auto; padding-inline: clamp(18px, 4vw, 44px); }

.mono {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 500;
}

.rule-double { border-top: 3px double var(--rule); }
.rule-thick { border-top: 2px solid var(--rule); }
.rule-hair { border-top: 1px solid var(--rule-soft); }

.skip-link {
  position: absolute; left: 12px; top: -60px;
  background: var(--ink); color: var(--paper);
  padding: 10px 18px; z-index: 99; font-family: var(--mono); font-size: 0.75rem;
  transition: top 0.15s ease;
}
.skip-link:focus { top: 12px; color: var(--paper); }

/* ---------- masthead ---------- */

.masthead { padding-top: 14px; }
.masthead .issue {
  display: flex; justify-content: space-between; gap: 16px;
  padding-block: 8px 10px; color: var(--ink-soft);
}
.wordmark {
  margin: 0; text-align: center;
  font-family: var(--serif-display); font-weight: 900;
  font-size: clamp(3.1rem, 10.5vw, 7.4rem);
  letter-spacing: 0.045em; line-height: 0.95;
  padding-block: clamp(10px, 2.5vw, 26px) clamp(6px, 1.4vw, 14px);
}
.wordmark .swash { font-style: italic; font-weight: 500; letter-spacing: 0; }
.tagline-rule {
  text-align: center; color: var(--ink-soft);
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.3em; text-transform: uppercase;
  padding-bottom: 14px;
}

.nav {
  display: flex; justify-content: center; flex-wrap: wrap;
  border-top: 2px solid var(--rule); border-bottom: 1px solid var(--rule);
}
.nav a {
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--ink); text-decoration: none; padding: 12px clamp(10px, 2.4vw, 26px);
  border-left: 1px solid var(--rule-faint);
}
.nav a:first-child { border-left: none; }
.nav a:hover { background: var(--ink); color: var(--paper); }
.nav a.cta { color: var(--rust); font-weight: 500; }
.nav a.cta:hover { background: var(--rust); color: var(--paper); }

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

.hero { padding-block: clamp(40px, 7vw, 84px) clamp(30px, 5vw, 56px); }
.hero-grid {
  display: grid; grid-template-columns: minmax(0, 1fr) 210px; gap: clamp(24px, 4vw, 56px);
  align-items: start;
}
.hero h1 {
  font-family: var(--serif-display); font-weight: 700;
  font-size: clamp(2.6rem, 6.6vw, 5.2rem);
  line-height: 1.02; letter-spacing: -0.01em;
  margin: 14px 0 22px;
}
.hero h1 em { font-style: italic; font-weight: 500; color: var(--verdigris-deep); }
.standfirst {
  font-size: clamp(1.12rem, 2vw, 1.34rem); line-height: 1.55;
  max-width: 34ch; margin: 0 0 30px; color: var(--ink-soft);
  font-weight: 400;
}
.standfirst strong { color: var(--ink); font-weight: 500; }

.cta-row { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.btn {
  display: inline-block; font-family: var(--mono); font-size: 0.74rem;
  letter-spacing: 0.16em; text-transform: uppercase; text-decoration: none;
  padding: 15px 26px; border: 1.5px solid var(--ink); color: var(--ink);
  transition: background 0.15s ease, color 0.15s ease;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn.solid { background: var(--ink); color: var(--paper); }
.btn.solid:hover { background: var(--verdigris-deep); border-color: var(--verdigris-deep); }
.btn.rust { border-color: var(--rust); color: var(--rust); }
.btn.rust:hover { background: var(--rust); color: var(--paper); }

.marginalia {
  border-left: 2px solid var(--rust); padding-left: 18px;
  font-family: var(--serif-text); font-style: italic; font-size: 0.92rem;
  color: var(--ink-soft); line-height: 1.6;
}
.marginalia .mono { display: block; color: var(--rust); font-style: normal; margin-bottom: 8px; }

/* ---------- section chrome ---------- */

section { padding-block: clamp(38px, 6vw, 76px); }
.section-head { margin-bottom: clamp(24px, 4vw, 44px); }
.section-head .kicker { color: var(--rust); margin-bottom: 10px; display: block; }
.section-head h2 {
  font-family: var(--serif-display); font-weight: 700;
  font-size: clamp(1.9rem, 4.4vw, 3.2rem); line-height: 1.08; margin: 0;
}
.section-head h2 em { font-style: italic; font-weight: 500; }
.section-head .lede {
  max-width: var(--measure); color: var(--ink-soft); margin: 14px 0 0; font-size: 1.06rem;
}

/* ---------- now & then: the slider ---------- */

.plate {
  background: var(--paper-deep);
  border: 1px solid var(--rule-soft);
  padding: clamp(10px, 1.6vw, 18px);
}
.plate-frame { position: relative; border: 1px solid var(--rule); background: #141008; }

.compare {
  position: relative; overflow: hidden;
  aspect-ratio: 3 / 2; user-select: none;
  --split: 50%;
  touch-action: pan-y;
}
.compare img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.compare .layer-past { clip-path: inset(0 calc(100% - var(--split)) 0 0); }

.compare .divider {
  position: absolute; top: 0; bottom: 0; left: var(--split);
  width: 2px; margin-left: -1px; background: rgba(242, 236, 220, 0.95);
  box-shadow: 0 0 0 1px rgba(33, 26, 15, 0.4);
  pointer-events: none;
}
.compare .divider::before {
  content: ''; position: absolute; top: 50%; left: 50%;
  width: 46px; height: 46px; transform: translate(-50%, -50%);
  background: var(--paper); border: 1.5px solid var(--ink); border-radius: 50%;
  box-shadow: 0 2px 10px rgba(0,0,0,0.35);
}
.compare .divider::after {
  content: '◂ ▸'; position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -52%);
  font-size: 13px; letter-spacing: 2px; color: var(--ink); white-space: nowrap;
}

.compare .era-tag {
  position: absolute; top: 14px; z-index: 3;
  font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.14em; text-transform: uppercase;
  background: rgba(23, 18, 9, 0.72); color: var(--paper);
  padding: 7px 11px; backdrop-filter: blur(2px);
}
.compare .era-past { left: 14px; }
.compare .era-now { right: 14px; }

/* invisible range input drives the divider for keyboard + AT */
.compare .scrub {
  position: absolute; inset: 0; width: 100%; height: 100%;
  opacity: 0; margin: 0; cursor: ew-resize; z-index: 4;
}
.compare .scrub:focus-visible ~ .divider::before { outline: 2.5px solid var(--rust); outline-offset: 4px; }

.plate-toolbar {
  display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center;
  gap: 12px; padding-top: 14px;
}
.stop-tabs { display: flex; flex-wrap: wrap; gap: 0; border: 1px solid var(--rule-soft); }
.stop-tabs button {
  appearance: none; border: none; border-left: 1px solid var(--rule-soft);
  background: transparent; color: var(--ink-soft); cursor: pointer;
  font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.12em; text-transform: uppercase;
  padding: 11px 16px;
}
.stop-tabs button:first-child { border-left: none; }
.stop-tabs button:hover { background: rgba(33,26,15,0.07); color: var(--ink); }
.stop-tabs button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }

.plate-caption {
  display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap;
  padding-top: 12px; font-size: 0.88rem; color: var(--ink-soft); line-height: 1.55;
}
.plate-caption .plate-no { font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--rust); white-space: nowrap; }
.plate-caption p { margin: 0; max-width: 72ch; }
.plate-caption .honesty { color: var(--rust); font-style: italic; }

/* ---------- expedition ---------- */

.expedition-grid {
  display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(24px, 4vw, 52px); align-items: start;
}
.itinerary { counter-reset: stop; margin: 0; padding: 0; list-style: none; }
.itinerary li {
  counter-increment: stop; display: grid; grid-template-columns: 56px 1fr; gap: 16px;
  padding: 18px 0; border-top: 1px solid var(--rule-soft);
}
.itinerary li:first-child { border-top: 2px solid var(--rule); }
.itinerary li:last-child { border-bottom: 2px solid var(--rule); }
.itinerary .no {
  font-family: var(--serif-display); font-weight: 700; font-size: 1.7rem; line-height: 1;
  color: var(--verdigris-deep); padding-top: 3px;
}
.itinerary h3 {
  margin: 0 0 4px; font-family: var(--serif-display); font-weight: 700; font-size: 1.24rem;
}
.itinerary .meta { color: var(--ink-faint); margin-bottom: 6px; display: block; }
.itinerary p { margin: 0; font-size: 0.95rem; color: var(--ink-soft); }
.itinerary .era-pill {
  display: inline-block; font-family: var(--mono); font-size: 0.6rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--verdigris-deep);
  border: 1px solid var(--verdigris); padding: 3px 8px; margin-top: 8px;
}

/* ---------- how it works ---------- */

.steps {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 0;
  border-top: 2px solid var(--rule); border-bottom: 2px solid var(--rule);
}
.step { padding: clamp(20px, 3vw, 36px); border-left: 1px solid var(--rule-soft); }
.step:first-child { border-left: none; }
.step .numeral {
  font-family: var(--serif-display); font-size: 3rem; font-weight: 500; font-style: italic;
  color: var(--rule-soft); line-height: 1; display: block; margin-bottom: 12px;
}
.step h3 { font-family: var(--serif-display); font-size: 1.32rem; margin: 0 0 10px; }
.step p { margin: 0; font-size: 0.95rem; color: var(--ink-soft); }

.device-wrap {
  display: grid; grid-template-columns: 240px minmax(0, 1fr);
  gap: clamp(24px, 4vw, 52px); align-items: center; margin-top: clamp(28px, 4vw, 48px);
}
.device {
  width: 240px; margin-inline: auto;
  border: 2.5px solid var(--ink); border-radius: 34px;
  padding: 9px; background: var(--ink);
  box-shadow: 0 18px 44px rgba(33,26,15,0.28);
}
.device .screen { position: relative; border-radius: 25px; overflow: hidden; aspect-ratio: 9/19; background: #000; }
.device .screen img { width: 100%; height: 100%; object-fit: cover; }
.device .reticle { position: absolute; inset: 0; }
.device .hud {
  position: absolute; left: 0; right: 0; bottom: 14px; text-align: center;
  font-family: var(--mono); font-size: 0.55rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: #f2ecdc; text-shadow: 0 1px 4px rgba(0,0,0,0.8);
}
.device .hud b { display: block; font-size: 0.68rem; color: #8fd6be; font-weight: 500; }
.device-note .mono { color: var(--rust); display: block; margin-bottom: 8px; }
.device-note p { max-width: 52ch; color: var(--ink-soft); font-size: 0.98rem; }

/* ---------- field notes ---------- */

.notes { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(20px, 3vw, 40px); }
.note h3 {
  font-family: var(--serif-display); font-size: 1.28rem; margin: 0 0 10px;
  padding-top: 14px; border-top: 2px solid var(--rust);
}
.note p { font-size: 0.95rem; color: var(--ink-soft); margin: 0 0 10px; }
.note .hatch-sample {
  margin-top: 14px; height: 46px; border: 1px solid var(--rule-soft);
  background:
    repeating-linear-gradient(-45deg, rgba(158,59,37,0.35) 0 2px, transparent 2px 7px),
    var(--paper-deep);
  display: flex; align-items: center; justify-content: center;
}
.note .hatch-sample span { background: var(--paper); padding: 4px 10px; font-family: var(--mono); font-size: 0.6rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--rust); }

/* ---------- pricing ---------- */

.pricing { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(18px, 3vw, 36px); }
.price-card {
  border: 1.5px solid var(--ink); padding: clamp(22px, 3vw, 34px); position: relative;
  background: var(--paper);
}
.price-card.featured { border-color: var(--verdigris-deep); box-shadow: 6px 6px 0 var(--verdigris-deep); }
.price-card .flag {
  position: absolute; top: -11px; left: 22px; background: var(--verdigris-deep); color: var(--paper);
  font-family: var(--mono); font-size: 0.6rem; letter-spacing: 0.14em; text-transform: uppercase;
  padding: 5px 12px;
}
.price-card h3 { font-family: var(--serif-display); font-size: 1.6rem; margin: 0 0 6px; }
.price-card .amount {
  font-family: var(--serif-display); font-size: 2.6rem; font-weight: 700; color: var(--verdigris-deep);
  line-height: 1; margin: 10px 0 4px;
}
.price-card .amount small { font-size: 0.95rem; font-family: var(--mono); letter-spacing: 0.1em; color: var(--ink-faint); font-weight: 400; }
.price-card ul { margin: 16px 0 0; padding: 0; list-style: none; font-size: 0.94rem; color: var(--ink-soft); }
.price-card li { padding: 8px 0 8px 22px; border-top: 1px solid var(--rule-faint); position: relative; }
.price-card li::before { content: '—'; position: absolute; left: 0; color: var(--rust); }
.hypothesis-tag { font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--rust); }

/* ---------- pilot CTA ---------- */

.pilot-block {
  border-top: 3px double var(--rule); border-bottom: 3px double var(--rule);
  padding: clamp(34px, 6vw, 70px) 0; text-align: center;
}
.pilot-block h2 {
  font-family: var(--serif-display); font-weight: 700; font-size: clamp(2rem, 5vw, 3.6rem);
  margin: 0 0 16px; line-height: 1.05;
}
.pilot-block h2 em { font-style: italic; font-weight: 500; color: var(--verdigris-deep); }
.pilot-block p { max-width: 56ch; margin: 0 auto 28px; color: var(--ink-soft); }
.pilot-fine { font-size: 0.82rem; color: var(--ink-faint); margin-top: 18px !important; font-style: italic; }

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

footer { padding: clamp(30px, 5vw, 54px) 0 40px; }
.foot-grid {
  display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(20px, 4vw, 48px); padding-top: 26px;
}
.foot-grid h4 { font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.16em; text-transform: uppercase; margin: 0 0 12px; color: var(--rust); }
.foot-grid p, .foot-grid li { font-size: 0.85rem; color: var(--ink-soft); margin: 0 0 8px; }
.foot-grid ul { list-style: none; margin: 0; padding: 0; }
.colophon { font-size: 0.78rem; color: var(--ink-faint); line-height: 1.6; }
.foot-brand { font-family: var(--serif-display); font-weight: 900; font-size: 1.9rem; letter-spacing: 0.04em; margin-bottom: 6px; }

/* ---------- reveal ---------- */

.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }

/* ---------- responsive ---------- */

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .marginalia { max-width: 46ch; }
  .expedition-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .step { border-left: none; border-top: 1px solid var(--rule-soft); }
  .step:first-child { border-top: none; }
  .notes { grid-template-columns: 1fr; }
  .device-wrap { grid-template-columns: 1fr; }
  .pricing { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; }
  body { font-size: 17px; }
}