/* ————————————————————————————————————————————————
   Colophon — landing page
   Set in Baskerville; bound in viridian; stamped in gold.
   ———————————————————————————————————————————————— */

/* Tokens ------------------------------------------------------------- */

:root {
  /* sampled from the brand assets */
  --cloth:    #1F4038;  /* viridian book cloth (app icon) */
  --cloth-2:  #193630;  /* deeper cloth, gradients */
  --gold:     #D6A74E;  /* gold foil (icon "C.") */
  --gold-hi:  #ECD28A;  /* foil highlight */
  --gold-lo:  #A9812E;  /* deep gold (wordmark dot) */
  --gold-ink: #8A671F;  /* gold dark enough to read on paper */
  --ink:      #32314D;  /* prussian ink (wordmark) */
  --ink-soft: #55546E;
  --paper:    #F7F4EC;  /* cream paper (app background) */
  --paper-hi: #FDFBF6;
  --night:    #16181C;  /* dark-mode surface (dark app icon) */
  --oxblood:  #B23A2E;  /* starred-article red */
  --rule:     rgba(50, 49, 77, 0.16);
  --rule-soft: rgba(50, 49, 77, 0.09);

  --serif: "Baskerville", "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, "Times New Roman", serif;
  /* To self-host Libre Baskerville instead, see README → “Typography”. */
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --bg: var(--paper);
  --fg: var(--ink);
  --fg-soft: var(--ink-soft);
  --accent-ink: var(--gold-ink);

  --wrap: 1120px;
  --wrap-narrow: 720px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: var(--night);
    --fg: #E7E3D8;
    --fg-soft: #B4B0A4;
    --accent-ink: var(--gold);
    --rule: rgba(231, 227, 216, 0.16);
    --rule-soft: rgba(231, 227, 216, 0.08);
  }
}

/* Reset -------------------------------------------------------------- */

*, *::before, *::after { box-sizing: border-box; }

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

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

h1, h2, h3 { margin: 0; font-family: var(--serif); font-weight: 600; line-height: 1.12; text-wrap: balance; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

a { color: inherit; }

::selection { background: var(--gold); color: var(--cloth); }

:focus-visible { outline: 2px solid var(--accent-ink); outline-offset: 3px; border-radius: 2px; }

/* on viridian cloth, the light-scheme gold-ink ring is too dim — use bright foil */
.cover :focus-visible,
.privacy :focus-visible { outline-color: var(--gold); }

[id] { scroll-margin-top: 84px; }

/* Layout ------------------------------------------------------------- */

.wrap {
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(20px, 4.5vw, 44px);
}

.wrap-narrow { max-width: var(--wrap-narrow); }

.section { padding-block: clamp(64px, 10vw, 128px); }

/* Nav ---------------------------------------------------------------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--rule-soft);
}

.nav-row {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 60px;
}

.brand {
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 600;
  text-decoration: none;
  letter-spacing: 0.01em;
}

.brand-dot { color: var(--accent-ink); }

.nav-links {
  display: flex;
  gap: 26px;
  margin-inline: auto;
}

.nav-links a {
  font-size: 0.86rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--fg-soft);
}

.nav-links a:hover { color: var(--fg); }

.nav-badge {
  margin-left: auto;
  font-size: 0.72rem;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.14em;
  color: var(--accent-ink);
  border: 1px solid color-mix(in srgb, var(--accent-ink) 45%, transparent);
  border-radius: 999px;
  padding: 3px 12px 4px;
  white-space: nowrap;
}

.nav-links + .nav-badge { margin-left: 0; }

@media (max-width: 680px) {
  .nav-links { display: none; }
  .nav-badge { margin-left: auto; }
}

/* Cover -------------------------------------------------------------- */

.cover {
  position: relative;
  background-color: var(--cloth);
  background-image:
    radial-gradient(120% 90% at 50% -10%, rgba(247, 244, 236, 0.07), transparent 62%),
    linear-gradient(180deg, var(--cloth), var(--cloth-2)),
    url("data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20width='220'%20height='220'%3E%3Cfilter%20id='n'%3E%3CfeTurbulence%20type='fractalNoise'%20baseFrequency='0.85'%20numOctaves='2'/%3E%3CfeColorMatrix%20type='saturate'%20values='0'/%3E%3CfeComponentTransfer%3E%3CfeFuncA%20type='table'%20tableValues='0%200.055'/%3E%3C/feComponentTransfer%3E%3C/filter%3E%3Crect%20width='100%25'%20height='100%25'%20filter='url(%23n)'/%3E%3C/svg%3E");
  background-blend-mode: normal, normal, normal;
  color: #F3EFE3;
  text-align: center;
  display: grid;
  place-items: center;
  min-height: min(860px, calc(100svh - 60px));
  padding: clamp(80px, 12vw, 150px) clamp(24px, 6vw, 64px);
  overflow: hidden;
}

.cover-frame,
.cover-frame::after {
  position: absolute;
  pointer-events: none;
  border: 1px solid rgba(214, 167, 78, 0.5);
}

.cover-frame { inset: clamp(14px, 2.6vw, 26px); }

.cover-frame::after {
  content: "";
  inset: 5px;
  border-color: rgba(214, 167, 78, 0.22);
}

.cover-inner { max-width: 760px; }

.cover-eyebrow {
  font-size: 0.8rem;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.26em;
  color: var(--gold);
  margin-bottom: clamp(20px, 3.5vw, 34px);
}

.cover-title {
  --foil: linear-gradient(103deg, var(--gold-lo) 4%, var(--gold-hi) 38%, var(--gold) 58%, var(--gold-lo) 96%);
  font-size: clamp(3.6rem, 2.4rem + 7.5vw, 7.25rem);
  font-weight: 600;
  letter-spacing: 0.005em;
  background-image: var(--foil);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.cover-dot { margin-left: 0.02em; }

.ornament {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  color: var(--gold);
  margin-block: clamp(22px, 3.5vw, 34px);
}

.ornament-rule {
  width: clamp(48px, 9vw, 96px);
  height: 1px;
  background: currentColor;
  opacity: 0.55;
}

.cover-sub {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(1.3rem, 1.05rem + 1.4vw, 1.8rem);
  line-height: 1.35;
  color: #F3EFE3;
  margin-bottom: 0.9em;
}

.cover-body {
  max-width: 560px;
  margin-inline: auto;
  font-size: 1rem;
  color: rgba(243, 239, 227, 0.82);
  margin-bottom: clamp(28px, 4vw, 40px);
}

.cover-cta {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
}

.cover-note {
  margin-top: 22px;
  font-size: 0.78rem;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.2em;
  color: rgba(243, 239, 227, 0.62);
}

/* Cover entrance ----------------------------------------------------- */
/* Anime.js drives the entrance when it loads (script.js). The CSS
   keyframes below are the fallback: no JS at all, or module load failed
   (html.no-anime). While JS is present the pieces start hidden. */

@media (prefers-reduced-motion: no-preference) {
  html.js .cover-title,
  html.js .cover-eyebrow,
  html.js .ornament,
  html.js .cover-sub,
  html.js .cover-body,
  html.js .cover-cta,
  html.js .cover-note { opacity: 0; }

  html:not(.js) .cover-title,
  html.no-anime .cover-title {
    animation: stamp 1s cubic-bezier(0.2, 0.7, 0.3, 1) 0.1s both;
  }
  html:not(.js) .cover-eyebrow,
  html.no-anime .cover-eyebrow { animation: rise 0.8s ease-out 0.55s both; }
  html:not(.js) .ornament, html:not(.js) .cover-sub,
  html.no-anime .ornament, html.no-anime .cover-sub { animation: rise 0.8s ease-out 0.7s both; }
  html:not(.js) .cover-body,
  html.no-anime .cover-body { animation: rise 0.8s ease-out 0.82s both; }
  html:not(.js) .cover-cta, html:not(.js) .cover-note,
  html.no-anime .cover-cta, html.no-anime .cover-note { animation: rise 0.8s ease-out 0.94s both; }

  @keyframes stamp {
    from { opacity: 0; letter-spacing: 0.14em; filter: blur(4px); }
    to   { opacity: 1; letter-spacing: 0.005em; filter: blur(0); }
  }
  @keyframes rise {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: none; }
  }
}

/* the anime.js entrance sets letters individually: each carries its own
   foil fill, and the parent's is dropped so nothing double-paints while
   the letters move */
.cover-title .ct-char,
.cover-dot {
  display: inline-block;
  background-image: var(--foil);
  -webkit-background-clip: text;
  background-clip: text;
}

html.anime .cover-title { background-image: none; }

.ornament .ornament-rule:first-child { transform-origin: 100% 50%; }
.ornament .ornament-rule:last-child { transform-origin: 0% 50%; }

/* Buttons ------------------------------------------------------------ */

.btn {
  display: inline-block;
  font-family: var(--sans);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  border-radius: 999px;
  padding: 12px 26px;
  transition: transform 0.18s ease, background-color 0.18s ease, border-color 0.18s ease;
}

.btn:active { transform: translateY(1px); }

/* anime.js springs own the transform; keep only color transitions */
html.anime .btn { transition-property: background-color, border-color; }
html.anime .btn:active { transform: none; }

.btn-foil {
  background: linear-gradient(120deg, var(--gold-hi), var(--gold) 45%, var(--gold-lo) 120%);
  color: #21301F;
  color: var(--cloth-2);
}

.btn-foil:hover { background: linear-gradient(120deg, #F2DD9E, #E0B45C 45%, var(--gold-lo) 130%); }

.btn-ghost {
  border: 1px solid rgba(243, 239, 227, 0.45);
  color: #F3EFE3;
}

.btn-ghost:hover { border-color: rgba(243, 239, 227, 0.85); }

.btn-ink {
  background: var(--cloth);
  color: #F3EFE3;
  border: 1px solid transparent;
}

.btn-ink:hover { background: #274f45; }

@media (prefers-color-scheme: dark) {
  .btn-ink { background: var(--gold); color: var(--night); }
  .btn-ink:hover { background: var(--gold-hi); }
}

/* Preface ------------------------------------------------------------ */

.preface { padding-bottom: clamp(24px, 4vw, 48px); }

.preface-text {
  font-family: var(--serif);
  font-size: clamp(1.2rem, 1.05rem + 0.9vw, 1.5rem);
  line-height: 1.6;
  color: var(--fg);
}

.preface-text em { font-style: italic; }

.dropcap {
  float: left;
  font-family: var(--serif);
  font-size: 3.4em;
  line-height: 0.82;
  padding: 0.06em 0.12em 0 0;
  color: var(--accent-ink);
}

/* Plates ------------------------------------------------------------- */

.eyebrow {
  font-size: 0.78rem;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.24em;
  color: var(--accent-ink);
  margin-bottom: 14px;
}

.plate h2 {
  font-size: clamp(1.85rem, 1.3rem + 2.4vw, 2.9rem);
  margin-bottom: 0.5em;
}

.plate-head { max-width: 640px; margin-bottom: clamp(36px, 6vw, 64px); }

.plate-lede { color: var(--fg-soft); font-size: 1.08rem; }

.plate-copy p { color: var(--fg-soft); }
.plate-copy p:first-of-type { color: var(--fg); }

.plate-split {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: clamp(36px, 6.5vw, 88px);
  align-items: center;
}

.plate-split .plate-copy h2 { margin-bottom: 0.55em; }

.plate-split-rev { grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); }
.plate-split-rev figure { order: -1; }

figure { margin: 0; }

figcaption, .fig-caption-center {
  margin-top: 20px;
  text-align: center;
  font-size: 0.8rem;
  font-variant-caps: all-small-caps;
  letter-spacing: 0.16em;
  color: var(--fg-soft);
}

.fig-no { color: var(--accent-ink); }

.fa-line {
  font-size: 1.35rem;
  line-height: 1.9;
  color: var(--fg);
  margin-bottom: 0.6em;
}

/* Device frames ------------------------------------------------------ */

.frame {
  background: #101014;
  box-shadow:
    inset 0 0 0 1.5px rgba(255, 255, 255, 0.07),
    0 1px 2px rgba(22, 24, 28, 0.18),
    0 28px 68px -28px rgba(22, 24, 28, 0.5);
}

.frame img { width: 100%; }

.frame-phone {
  max-width: min(320px, 80vw);
  margin-inline: auto;
  padding: clamp(8px, 1.2vw, 11px);
  border-radius: clamp(38px, 5.4vw, 48px);
}

.frame-phone img { border-radius: clamp(30px, 4.4vw, 38px); }

.frame-pad {
  max-width: 460px;
  margin-inline: auto;
  padding: clamp(10px, 1.4vw, 14px);
  border-radius: clamp(26px, 3.4vw, 34px);
}

.frame-pad img { border-radius: clamp(17px, 2.2vw, 21px); }

.frame-pad-l {
  max-width: 1020px;
  margin-inline: auto;
  padding: clamp(10px, 1.6vw, 16px);
  border-radius: clamp(26px, 3.6vw, 38px);
}

.frame-pad-l img { border-radius: clamp(17px, 2.3vw, 23px); }

/* Dark plate band ---------------------------------------------------- */

.plate-dark {
  background: var(--night);
  color: #E7E3D8;
}

@media (prefers-color-scheme: dark) {
  /* keep the night band distinct when the whole page is already dark */
  .plate-dark {
    background: #101216;
    border-block: 1px solid rgba(231, 227, 216, 0.07);
  }
}

.plate-dark .eyebrow { color: var(--gold); }
.plate-dark .plate-lede, .plate-dark figcaption, .plate-dark .fig-caption-center { color: #B4B0A4; }

.plate-dark .frame {
  background: #26282e;
  box-shadow:
    inset 0 0 0 1.5px rgba(255, 255, 255, 0.09),
    0 1px 2px rgba(0, 0, 0, 0.4),
    0 28px 68px -28px rgba(0, 0, 0, 0.85);
}

.plate-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(24px, 5vw, 64px);
  max-width: 740px;
  margin-inline: auto;
}

/* Index -------------------------------------------------------------- */

.index { border-top: 1px solid var(--rule-soft); }

.index-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: clamp(40px, 6vw, 88px);
  row-gap: 20px;
  margin: 0;
}

.index-row {
  padding-left: 1.5em;
  text-indent: -1.5em;
  border-bottom: 1px dotted var(--rule);
  padding-bottom: 18px;
}

.index-row dt {
  display: inline;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.06rem;
}

.index-row dt::after { content: "\2002—\2002"; color: var(--accent-ink); font-weight: 400; }

.index-row dd {
  display: inline;
  margin: 0;
  color: var(--fg-soft);
  font-size: 0.98rem;
}

/* Privacy ------------------------------------------------------------ */

.privacy {
  background-color: var(--cloth);
  background-image:
    radial-gradient(110% 100% at 50% 0%, rgba(247, 244, 236, 0.05), transparent 60%),
    url("data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20width='220'%20height='220'%3E%3Cfilter%20id='n'%3E%3CfeTurbulence%20type='fractalNoise'%20baseFrequency='0.85'%20numOctaves='2'/%3E%3CfeColorMatrix%20type='saturate'%20values='0'/%3E%3CfeComponentTransfer%3E%3CfeFuncA%20type='table'%20tableValues='0%200.055'/%3E%3C/feComponentTransfer%3E%3C/filter%3E%3Crect%20width='100%25'%20height='100%25'%20filter='url(%23n)'/%3E%3C/svg%3E");
  color: #F3EFE3;
}

.privacy .plate-head { margin-bottom: clamp(28px, 4vw, 40px); }
.privacy h2 { color: #F3EFE3; font-size: clamp(1.85rem, 1.3rem + 2.4vw, 2.9rem); margin-bottom: 0; }
.eyebrow-gold { color: var(--gold); }

.privacy-list {
  list-style: none;
  margin: 0 0 1.6em;
  padding: 0;
}

.privacy-list li {
  position: relative;
  padding-left: 34px;
  margin-bottom: 1em;
  color: rgba(243, 239, 227, 0.88);
}

.privacy-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--gold);
}

.privacy-more a {
  color: var(--gold);
  text-decoration-color: color-mix(in srgb, var(--gold) 45%, transparent);
  text-underline-offset: 3px;
}

.privacy-more a:hover { text-decoration-color: var(--gold); }

/* Closing ------------------------------------------------------------ */

.closing-inner { text-align: center; }

.ornament-ink { color: var(--accent-ink); margin-bottom: clamp(24px, 4vw, 36px); }

.closing h2 { font-size: clamp(1.8rem, 1.3rem + 2.2vw, 2.7rem); margin-bottom: 0.55em; }

.closing p { color: var(--fg-soft); max-width: 460px; margin-inline: auto; }

.closing .btn { margin-top: 10px; }

/* Footer ------------------------------------------------------------- */

.colophon-foot {
  border-top: 1px solid var(--rule-soft);
  padding-block: clamp(48px, 7vw, 80px);
  text-align: center;
}

.foot-mark {
  font-size: 1.5rem;
  color: var(--accent-ink);
  margin-bottom: 20px;
}

.foot-text {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.98rem;
  color: var(--fg-soft);
  max-width: 560px;
  margin-inline: auto;
}

.swatch {
  display: inline-block;
  width: 11px;
  height: 11px;
  border-radius: 3px;
  vertical-align: baseline;
  margin-right: 1px;
  border: 1px solid color-mix(in srgb, var(--fg) 40%, transparent);
}

.swatch-paper { background: #F7F4EC; }
.swatch-cloth { background: #1F4038; }
.swatch-gold  { background: #D6A74E; }

.foot-links {
  margin-top: 28px;
  display: flex;
  justify-content: center;
  gap: 12px;
  font-size: 0.88rem;
  color: var(--fg-soft);
}

.foot-links a {
  color: var(--fg);
  text-decoration-color: color-mix(in srgb, var(--accent-ink) 50%, transparent);
  text-underline-offset: 3px;
}

.foot-links a:hover { text-decoration-color: var(--accent-ink); }

.foot-legal {
  margin-top: 18px;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--fg-soft);
}

/* Scroll reveals ------------------------------------------------------ */

@media (prefers-reduced-motion: no-preference) {
  html.js .reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.7s ease-out, transform 0.7s ease-out;
  }
  html.js .reveal.in {
    opacity: 1;
    transform: none;
  }
  /* when anime.js drives the reveals it owns transform/opacity directly */
  html.anime .reveal {
    transform: none;
    transition: none;
  }
}

/* Responsive ---------------------------------------------------------- */

@media (max-width: 900px) {
  .plate-split,
  .plate-split-rev { grid-template-columns: 1fr; gap: 40px; }
  .plate-split-rev figure { order: 0; }
  .plate-head { margin-bottom: 36px; }
}

@media (max-width: 700px) {
  .index-list { grid-template-columns: 1fr; }
  .plate-pair { grid-template-columns: 1fr; max-width: 320px; }
  .foot-links { flex-wrap: wrap; }
}

/* Print (someone will) ------------------------------------------------ */

@media print {
  .nav, .cover-cta, .closing .btn { display: none; }
  /* browsers omit backgrounds when printing: force ink on plain paper, and
     override any opacity/transform state left inline by the animations */
  * {
    color: #000 !important;
    background: transparent !important;
    box-shadow: none !important;
    text-shadow: none !important;
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
    filter: none !important;
  }
  .cover { min-height: auto; }
  .cover-title, .cover-title .ct-char, .cover-dot {
    -webkit-background-clip: initial;
    background-clip: initial;
  }
}