/* ============================================================
   UNSEEN VISION — marketing site
   Built on the Unseen Photography design system.
   Paper-first, type- and whitespace-led. Amber punctuates only.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,400;0,500;0,600;1,400;1,500&family=Inter:wght@300;400;500;600&display=swap');

:root {
  /* core palette */
  --paper:  #F6F2EA;
  --black:  #111111;
  --warm:   #D9D2C7;
  --gray:   #8A847C;
  --gray-ui:#6F6960;          /* darker gray for AA body-metadata on paper */
  --amber:  #C89A2B;
  --deep:   #0A0A0A;
  --ink-2:  #3A3633;          /* soft black, sparing */

  --line:        rgba(17,17,17,0.12);
  --line-soft:   rgba(17,17,17,0.07);
  --line-ondark: rgba(246,242,234,0.14);

  /* type */
  --display: "Cormorant Garamond", "EB Garamond", Georgia, serif;
  --sans: "Inter", system-ui, -apple-system, "Helvetica Neue", Helvetica, Arial, sans-serif;

  /* spacing */
  --s1: 8px;  --s2: 16px; --s3: 24px; --s4: 32px;
  --s5: 48px; --s6: 64px; --s7: 96px; --s8: 128px;

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --maxw: 1200px;
  --measure: 660px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--black);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  font-weight: 400;
}

::selection { background: rgba(200,154,43,0.22); }

a { color: inherit; }

/* ---------- layout ---------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 40px; }
@media (max-width: 720px) { .wrap { padding: 0 24px; } }

section { position: relative; }
.section-pad { padding: clamp(96px, 13vh, 168px) 0; }

.ground-paper { background: var(--paper); }
.ground-warm  { background: var(--warm); }
.ground-black { background: var(--black); color: var(--paper); }

/* hairline divider between paper sections */
.div-top { border-top: 1px solid var(--line-soft); }

/* ---------- type primitives ---------- */
.display {
  font-family: var(--display);
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.02;
  margin: 0;
}
.h-hero  { font-family: var(--display); font-weight: 500; letter-spacing: -0.015em; line-height: 1.04;  margin: 0; font-size: clamp(34px, 5.4vw, 66px); }
.h-sec   { font-family: var(--display); font-weight: 500; letter-spacing: -0.01em;  line-height: 1.04; margin: 0; font-size: clamp(32px, 4.6vw, 50px); }
.h-sub   { font-family: var(--display); font-weight: 500; line-height: 1.1; margin: 0; font-size: clamp(24px, 3vw, 32px); }

.lede {
  font-size: clamp(18px, 1.5vw, 21px);
  line-height: 1.62;
  color: var(--ink-2);
  max-width: var(--measure);
}
.body { font-size: 17px; line-height: 1.68; color: var(--ink-2); max-width: var(--measure); }
.body p { margin: 0 0 1.15em; }
.body p:last-child { margin-bottom: 0; }
.body strong { font-weight: 600; color: var(--black); }

/* small editorial label */
.label {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gray);
  margin: 0;
}
.ground-black .label { color: var(--gray); }

/* section eyebrow: index + amber tick + label */
.eyebrow {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: var(--s4);
}
.eyebrow .num {
  font-family: var(--sans);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--amber);
}
.eyebrow .tick { width: 26px; height: 1px; background: var(--amber); flex: none; }
.eyebrow .label { letter-spacing: 0.18em; }

/* the signature thin amber rule */
.rule-amber { display: block; width: 44px; height: 1px; background: var(--amber); border: 0; margin: 0; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--sans);
  font-weight: 500;
  font-size: 15px;
  letter-spacing: 0.01em;
  padding: 15px 30px;
  border-radius: 6px;
  border: 1px solid var(--black);
  background: var(--black);
  color: var(--paper);
  cursor: pointer;
  text-decoration: none;
  transition: background var(--dur, 160ms) var(--ease), border-color 160ms var(--ease), color 160ms var(--ease), opacity 160ms var(--ease);
}
.btn:hover { background: #000; }
.btn-ghost {
  background: transparent;
  color: var(--black);
  border-color: var(--black);
}
.btn-ghost:hover { background: rgba(17,17,17,0.05); }
.ground-black .btn { background: var(--paper); color: var(--black); border-color: var(--paper); }
.ground-black .btn:hover { background: #fff; }

.textlink {
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 500;
  color: var(--black);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
  transition: border-color 160ms var(--ease);
}
.textlink:hover { border-color: var(--amber); }
.ground-black .textlink { color: var(--paper); border-color: var(--line-ondark); }

/* ---------- top nav ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 40px;
  background: rgba(246,242,234,0);
  transition: background 240ms var(--ease), border-color 240ms var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(246,242,234,0.86);
  -webkit-backdrop-filter: saturate(120%);
  border-bottom: 1px solid var(--line-soft);
}
.nav-brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
  color: var(--black);
}
.nav-brand .mark {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}
.nav-brand .sub {
  font-family: var(--sans);
  font-weight: 400;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gray);
}
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a {
  font-family: var(--sans);
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--black);
  text-decoration: none;
  opacity: 0.78;
  transition: opacity 160ms var(--ease);
}
.nav-links a:hover { opacity: 1; }
.nav-cta {
  font-size: 13px !important;
  letter-spacing: 0.04em;
  padding: 9px 18px;
  border: 1px solid var(--black);
  border-radius: 5px;
  opacity: 1 !important;
}
.nav-cta:hover { background: rgba(17,17,17,0.05); }
@media (max-width: 760px) {
  .nav { padding: 14px 24px; }
  .nav-links { gap: 18px; }
  .nav-links a.hide-sm { display: none; }
}

/* ---------- footer / colophon ---------- */
.colophon { background: var(--black); color: var(--paper); padding: var(--s7) 0 var(--s5); }
.colophon .wrap { display: flex; flex-wrap: wrap; gap: var(--s5); justify-content: space-between; align-items: flex-end; }
.colophon .mark-row { display: flex; align-items: baseline; gap: 12px; margin-bottom: 14px; }
.colophon .mark { font-family: var(--sans); font-weight: 600; font-size: 15px; letter-spacing: 0.22em; text-transform: uppercase; }
.colophon .tag { font-size: 14px; color: var(--gray); max-width: 320px; line-height: 1.5; }
.colophon .meta { font-size: 13px; color: var(--gray); letter-spacing: 0.02em; }
.colophon .meta a { color: var(--paper); text-decoration: none; border-bottom: 1px solid var(--line-ondark); padding-bottom: 1px; }
.colophon .meta a:hover { border-color: var(--amber); }

/* ---------- scroll-reveal ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 700ms var(--ease), transform 700ms var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: 80ms; }
.reveal.d2 { transition-delay: 160ms; }
.reveal.d3 { transition-delay: 240ms; }
.reveal.d4 { transition-delay: 320ms; }
body.no-motion .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
}