/* New Bremen: an ink-wash history.
   Without JS the page is a plain illustrated article. With JS (html.js) the
   chapters become a scroll track: photos are drawn on a fixed canvas and each
   chapter's copy is a fixed layer faded in and out by assets/js/main.js. */

:root {
  --paper: #efe7d6;
  --paper-deep: #e3d8c1;
  --ink: #1d2320;
  --ink-soft: #38423d;
  --ink-faint: #69746d;
  --wash: #8d998e;
  --seal: #a8322a;
  --seal-ink: #f7efe1;

  --display: "Cormorant Garamond", "Iowan Old Style", Georgia, serif;
  --body: "Source Serif 4", "Iowan Old Style", Georgia, serif;

  --gutter: clamp(1rem, 6vw, 8rem);
  --rail-space: clamp(3.5rem, 8vw, 10rem);

  color-scheme: light;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2 {
  font-family: var(--display);
  font-weight: 600;
  line-height: 0.98;
  letter-spacing: -0.01em;
  margin: 0;
  text-wrap: balance;
}

p { margin: 0 0 0.9em; text-wrap: pretty; }

a { color: inherit; text-decoration-color: color-mix(in srgb, var(--seal) 70%, transparent); text-underline-offset: 0.18em; }
a:hover { color: var(--seal); }
:focus-visible { outline: 2px solid var(--seal); outline-offset: 3px; }

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 20;
  padding: 0.5rem 0.9rem;
  background: var(--ink);
  color: var(--paper);
  border-radius: 3px;
}
.skip:focus { top: 1rem; }

/* ---------- Shared type ---------- */

.kicker,
.eyebrow {
  font-family: var(--body);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 0.6rem;
}

h1 {
  font-size: clamp(4.2rem, 14vw, 10.5rem);
  font-weight: 500;
  line-height: 0.86;
  margin: 0.1em 0 0.25em;
}

h2 {
  font-size: clamp(2.3rem, 4.3vw, 3.6rem);
  margin: 0 0 0.45em;
}

.lede {
  font-family: var(--display);
  font-style: italic;
  font-weight: 500;
  font-size: clamp(1.3rem, 2.3vw, 1.75rem);
  line-height: 1.25;
  color: var(--ink-soft);
  text-wrap: balance;
}

.copy p:not(.kicker):not(.eyebrow):not(.lede):not(.cue) { color: var(--ink-soft); }


/* ---------- Without JS: a plain illustrated article ---------- */

.stage,
.paper { display: none; }

.rail { display: none; }

.chapter { padding: 0 0 3rem; }

.art { margin: 0; }
.art img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 80vh;
  object-fit: cover;
}

.copy { padding: 2rem var(--gutter) 0; }
.copy__inner { max-width: 34rem; }
.copy--center .copy__inner,
.copy--bottom .copy__inner { margin-inline: auto; }
.opening { text-align: center; padding-top: 4rem; }
.cue { display: none; }

/* ---------- With JS: the scroll stage ---------- */

.js .stage {
  display: block;
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  background: var(--paper);
}

/* A soft vignette at the edges of the page. */
.js .paper {
  display: block;
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: radial-gradient(ellipse at center, transparent 55%, rgb(120 100 70 / 0.16) 100%);
  mix-blend-mode: multiply;
  opacity: 0.6;
}


.js .story { position: relative; z-index: 2; }

.js .chapter {
  position: relative;
  height: calc(var(--span, 3) * 100vh);
  padding: 0;
}

/* The photo is drawn on the canvas; the figure's image stays for its alt text. */
.js .art {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.js .copy {
  position: fixed;
  inset: 0;
  z-index: 3;
  display: flex;
  align-items: center;
  padding: 0;
  pointer-events: none;
  opacity: 0;
  will-change: opacity, transform;
}

.js .copy__inner {
  position: relative;
  max-width: 27rem;
  isolation: isolate;
}

/* While a chapter's text shows, its side of the screen fades to paper. It
   rides the copy's own opacity, so the photo is whole again for each
   transition. */
.js .copy::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}
.js .copy--left::before {
  background: linear-gradient(to right, rgb(239 231 214 / 0.94) 0%, rgb(239 231 214 / 0.8) 30%, rgb(239 231 214 / 0) 60%);
}
.js .copy--right::before {
  background: linear-gradient(to left, rgb(239 231 214 / 0.94) 0%, rgb(239 231 214 / 0.8) 30%, rgb(239 231 214 / 0) 60%);
}
.js .copy--bottom::before {
  background: linear-gradient(to top, rgb(239 231 214 / 0.95) 0%, rgb(239 231 214 / 0.8) 26%, rgb(239 231 214 / 0) 55%);
}
.js .copy--center::before {
  background: radial-gradient(ellipse 60% 55% at 50% 50%, rgb(239 231 214 / 0.85), rgb(239 231 214 / 0) 100%);
}

/* An edge-free wash of paper behind the text, so it reads over any photo. */
.js .copy__inner::before {
  content: "";
  position: absolute;
  inset: -4.5rem -5.5rem;
  z-index: -1;
  background: radial-gradient(closest-side, rgb(239 231 214 / 0.9), rgb(239 231 214 / 0.72) 55%, rgb(239 231 214 / 0) 100%);
  filter: blur(6px);
}

.js .copy--left { justify-content: flex-start; padding-left: var(--gutter); }
.js .copy--right { justify-content: flex-end; padding-right: calc(var(--gutter) * 0.6 + var(--rail-space)); }
/* Bottom copy runs wide and short: title on the left, text on the right, so
   the photo keeps the upper two-thirds of the screen. */
.js .copy--bottom { justify-content: center; align-items: flex-end; padding: 0 var(--rail-space) 8vh var(--gutter); }
.js .copy--bottom .copy__inner {
  max-width: 62rem;
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  column-gap: clamp(2rem, 4vw, 4rem);
  align-items: end;
}
.js .copy--bottom h2 { margin-bottom: 0.15em; }
.js .copy--bottom .copy__body p:last-child { margin-bottom: 0; }
.js .copy--bottom .copy__inner::before { inset: -4rem -6rem -3rem; }
.js .copy--center { justify-content: center; text-align: center; }
.js .copy--center .copy__inner { max-width: 46rem; }
.js .copy--center .copy__inner::before { inset: -3rem -6rem; }

.js .opening { padding: 0; }
.js .cue {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  margin-top: 2.2rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.js .cue::after {
  content: "";
  width: 2px;
  height: 3.2rem;
  border-radius: 2px;
  background: linear-gradient(to bottom, var(--ink-soft), transparent);
  transform-origin: top;
  animation: drip 2.4s ease-in-out infinite;
}
@keyframes drip {
  0% { transform: scaleY(0); opacity: 0.9; }
  60% { transform: scaleY(1); opacity: 0.9; }
  100% { transform: scaleY(1); opacity: 0; }
}

/* ---------- Chapter rail ---------- */

.js .rail {
  display: block;
  position: fixed;
  right: clamp(0.9rem, 2.4vw, 2rem);
  top: 50%;
  z-index: 6;
  transform: translateY(-50%);
}
.rail ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.15rem; }
.rail a {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.7rem;
  padding: 0.3rem 0;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-variant-numeric: tabular-nums;
  color: var(--ink-faint);
  text-decoration: none;
}
.rail a::after {
  content: "";
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  border: 1.5px solid currentColor;
  transition: background-color 0.3s, transform 0.3s, border-color 0.3s;
}
.rail span {
  opacity: 0;
  transform: translateX(4px);
  transition: opacity 0.3s, transform 0.3s;
  white-space: nowrap;
}
.rail a[aria-current="step"] { color: var(--ink); }
.rail a[aria-current="step"]::after { background: var(--seal); border-color: var(--seal); transform: scale(1.35); }
.rail a[aria-current="step"] span,
.rail:hover span,
.rail:focus-within span { opacity: 1; transform: none; }
.rail a:hover { color: var(--seal); }

/* ---------- Colophon ---------- */

.colophon {
  position: relative;
  z-index: 5;
  padding: 40vh var(--gutter) 5rem;
  background: linear-gradient(to bottom, rgb(239 231 214 / 0), var(--paper) 36vh);
}
.colophon__inner { max-width: 36rem; margin-inline: auto; }
.colophon h2 { font-size: clamp(2rem, 3.4vw, 2.8rem); }
.colophon p { color: var(--ink-soft); }
.colophon .fine { font-size: 0.9rem; color: var(--ink-faint); margin-top: 1.6rem; }
.colophon .top {
  display: inline-block;
  margin-top: 1rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

/* ---------- Narrow screens: copy moves to a bottom panel ---------- */

@media (max-width: 720px) {
  body { font-size: 0.97rem; line-height: 1.55; }
  h2 { font-size: 2.05rem; }
  .lede { font-size: 1.2rem; }

  .js .copy--center { padding: 0 1.5rem; }
  .js .copy--center .copy__inner::before { inset: -2rem -1.5rem; }

  .js .copy--left,
  .js .copy--right,
  .js .copy--bottom {
    justify-content: center;
    align-items: flex-end;
    padding: 0 1.25rem max(1.5rem, env(safe-area-inset-bottom));
  }
  .js .copy--left .copy__inner,
  .js .copy--right .copy__inner,
  .js .copy--bottom .copy__inner { display: block; max-width: 32rem; width: 100%; }
  .js .copy--bottom h2 { margin-bottom: 0.45em; }
  /* When the photo and text both fit, the text follows the photo down from
     the top and any spare room falls below it (main.js sets these). */
  .js .copy.is-top { align-items: flex-start; padding-top: var(--copy-top, 0px); }

  /* The photo sits above the text here, not behind it, so no paper wash. */
  .js .copy--left::before,
  .js .copy--right::before,
  .js .copy--bottom::before,
  .js .copy--left .copy__inner::before,
  .js .copy--right .copy__inner::before,
  .js .copy--bottom .copy__inner::before { display: none; }


  /* The rail becomes a row of dots along the top edge, clear of the text. */
  .js .rail {
    top: max(0.6rem, env(safe-area-inset-top));
    right: auto;
    left: 50%;
    transform: translateX(-50%);
  }
  .rail ol { grid-auto-flow: column; gap: 0; }
  .js .rail span { display: none; }
  .js .rail a { padding: 0.45rem 0.4rem; }
}

/* Short phone screens (or a phone browser with its toolbars showing): smaller
   text leaves room for the photo above it. */
@media (max-width: 720px) and (max-height: 760px) {
  body { font-size: 0.9rem; line-height: 1.5; }
  h2 { font-size: 1.8rem; }
}

@media (prefers-reduced-motion: reduce) {
  .js .cue::after { animation: none; transform: none; }
  .rail a::after,
  .rail span { transition: none; }
}

/* ---------- Photo credits ---------- */

.credit {
  margin-top: 1.1rem;
  padding-top: 0.7rem;
  border-top: 1px solid color-mix(in srgb, var(--ink-faint) 35%, transparent);
  font-size: 0.8rem;
  font-style: italic;
  line-height: 1.45;
  color: var(--ink-faint);
}
.copy .credit { color: var(--ink-faint); }
.credit span {
  display: block;
  font-style: normal;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.art figcaption { font-size: 0.85rem; font-style: italic; color: var(--ink-faint); padding: 0.4rem var(--gutter) 0; }

@media (max-width: 720px) {
  .credit { margin-top: 0.7rem; padding-top: 0.5rem; font-size: 0.74rem; }
}