@font-face {
  font-family: "Source Serif 4";
  font-style: normal;
  font-weight: 500 700;
  font-display: swap;
  src: url("../fonts/source-serif-4-latin.woff2") format("woff2");
}
@font-face {
  font-family: "Source Sans 3";
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url("../fonts/source-sans-3-latin.woff2") format("woff2");
}

:root {
  --paper: #EDE4D2;
  --land: #F4F6F5;
  --ink: #23201A;
  --flowline: #3A6F8A;
  --label-hydro: #1B3A4B;
  --rule: #B7A97D;
  --water-fill: #C5D9E8;
  --label-place: #5A6570;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Source Sans 3", -apple-system, sans-serif;
  font-size: 17px;
  line-height: 1.55;
}

a { color: inherit; }

:focus-visible {
  outline: 2px solid var(--flowline);
  outline-offset: 2px;
}

.corner-mark {
  position: fixed;
  top: 1.75rem;
  right: 2.25rem;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--label-place);
  text-decoration: none;
  z-index: 10;
}
.corner-mark:hover { color: var(--flowline); }

.eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--label-place);
  margin: 0 0 0.9rem;
}

.taper {
  display: block;
  width: 220px;
  height: 10px;
  margin: 2.25rem auto 0;
}

/* ---- home / cartouche ---- */

.cartouche {
  max-width: 1180px;
  margin: 6.5rem auto 0;
  padding: 0 1.5rem;
  text-align: center;
}

.cartouche h1 {
  font-family: "Source Serif 4", Georgia, serif;
  font-weight: 600;
  font-size: 4.4rem;
  line-height: 1;
  margin: 0 0 1.1rem;
  color: var(--label-hydro);
}

.cartouche p {
  font-size: 1.08rem;
  color: var(--ink);
  max-width: 58ch;
  margin: 0 auto;
}

/* ---- plate grid ---- */

.case {
  margin: 2.5rem auto 2rem;
  max-width: 1180px;
  padding: 0 1.5rem;
}

.case-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 1.1rem;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.6rem;
}

.case-head .eyebrow { margin: 0; }

.plate-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2.4rem 1.6rem;
}

.plate-divider {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.85rem;
  margin: -0.6rem 0;
}
.plate-divider::before,
.plate-divider::after {
  content: "";
  width: 90px;
  height: 1px;
  background: var(--rule);
}
.plate-divider span {
  width: 6px;
  height: 6px;
  transform: rotate(45deg);
  background: var(--label-place);
}

.plate-card {
  text-decoration: none;
  color: inherit;
  display: block;
}

.plate-card figure {
  margin: 0;
  overflow: hidden;
  line-height: 0;
  box-shadow: 0 4px 14px rgba(20, 30, 28, 0.16);
}

.plate-card img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.4s ease;
}

.plate-card:hover img { transform: scale(1.035); }

.plate-card .eyebrow { margin: 0 0 0.5rem; font-size: 0.72rem; }

.plate-card h2 {
  font-family: "Source Serif 4", serif;
  font-weight: 600;
  font-size: 1.35rem;
  margin: 0 0 0.05rem;
  color: var(--label-hydro);
}

footer {
  max-width: 640px;
  margin: 5rem auto 4rem;
  padding: 0 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--label-place);
}

/* ---- plate page ---- */

.plate-page {
  max-width: 1320px;
  margin: 0 auto;
  padding: 5.5rem 2rem 3rem;
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 3rem;
  align-items: start;
}

.plate-frame {
  background: var(--land);
  border: 1px solid var(--rule);
  padding: 0.6rem;
  margin: 0;
}
.plate-frame img { display: block; width: 100%; height: auto; }
.plate-caption {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--label-place);
  margin-top: 0.6rem;
}

.legend h1 {
  font-family: "Source Serif 4", serif;
  font-weight: 600;
  font-size: 2.1rem;
  line-height: 1.1;
  margin: 0 0 1rem;
  color: var(--label-hydro);
}

.legend .taper { margin: 0 0 1.1rem; width: 100%; }

.legend p.subtitle {
  font-size: 0.98rem;
  margin: 0 0 1.4rem;
}

.download-link {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--land);
  background: var(--flowline);
  text-decoration: none;
  padding: 0.65rem 1.1rem;
  margin-bottom: 2rem;
  transition: background 0.15s;
}
.download-link svg { width: 16px; height: 16px; flex: 0 0 auto; }
.download-link:hover { background: var(--label-hydro); }

.legend h3 {
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--label-place);
  margin: 0 0 0.7rem;
  border-top: 1px solid var(--rule);
  padding-top: 1rem;
}

.meta-list {
  margin: 0;
  display: grid;
  grid-template-columns: 5rem 1fr;
  row-gap: 0.85rem;
  column-gap: 0.9rem;
}
.meta-list dt {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--label-place);
  margin: 0;
  padding-top: 0.15rem;
}
.meta-list dd { margin: 0; font-size: 0.88rem; line-height: 1.5; color: var(--ink); }

.prints-panel {
  margin-top: 1.6rem;
  border: 1px solid var(--rule);
  background: var(--land);
  padding: 1.1rem 1.2rem;
}
.prints-panel h3 { border: none; padding-top: 0; margin-bottom: 0.5rem; }
.prints-panel p { font-size: 0.88rem; margin: 0 0 0.9rem; }
.prints-panel a.btn {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--flowline);
  text-decoration: none;
  border-bottom: 1px solid var(--flowline);
  padding-bottom: 1px;
}

.unlock-form {
  display: flex;
  gap: 0.5rem;
}
.unlock-form input {
  flex: 1 1 auto;
  min-width: 0;
  font-family: inherit;
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--rule);
  padding: 0.55rem 0.7rem;
}
.unlock-form input::placeholder { letter-spacing: 0.08em; color: var(--label-place); }
.unlock-form button {
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--land);
  background: var(--flowline);
  border: none;
  padding: 0.55rem 1rem;
  cursor: pointer;
  transition: background 0.15s;
}
.unlock-form button:hover { background: var(--label-hydro); }

.unlock-status {
  font-size: 0.8rem;
  color: var(--label-place);
  margin: 0.6rem 0 0;
  min-height: 1.1em;
}
[data-unlock-result]:not(:empty) { margin-top: 0.4rem; }

.plate-footer-nav {
  max-width: 1320px;
  margin: 0 auto;
  padding: 1.4rem 2rem 2rem;
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  border-top: 1px solid var(--rule);
}
.plate-footer-nav a { text-decoration: none; color: var(--label-hydro); }
.plate-footer-nav a:hover { color: var(--flowline); }
.plate-footer-nav .empty { visibility: hidden; }
.plate-footer-nav + footer { margin-top: 0; }

/* ---- about page ---- */

.about-page {
  max-width: 76ch;
  margin: 0 auto;
  padding: 6.5rem 1.5rem 5rem;
}

.about-page h1 {
  font-family: "Source Serif 4", serif;
  font-weight: 600;
  font-size: 2.8rem;
  line-height: 1.05;
  margin: 0 0 0;
  color: var(--label-hydro);
}

.about-page .taper { margin: 1.5rem 0 2.2rem; width: 100%; }

.about-page p {
  font-size: 1.02rem;
  margin: 0 0 1.6rem;
}

.scale-diagram {
  border: 1px solid var(--rule);
  background: var(--land);
  padding: 1.5rem 1.7rem;
  margin: 0 0 2.2rem;
}
.scale-diagram .row {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  margin-bottom: 0.7rem;
}
.scale-diagram .row:last-of-type { margin-bottom: 0; }
.scale-diagram svg { flex: 0 0 120px; }
.scale-diagram .row span { font-size: 0.85rem; color: var(--label-place); }
.scale-diagram .caption {
  margin: 1rem 0 0;
  padding-top: 0.9rem;
  border-top: 1px solid var(--rule);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--label-place);
}

.about-page .credit {
  font-size: 0.85rem;
  color: var(--label-place);
  margin-top: 3rem;
}

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

@media (max-width: 860px) {
  .plate-page { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .cartouche { margin-top: 4.5rem; }
  .cartouche h1 { font-size: 3rem; }
  .plate-grid { grid-template-columns: 1fr; }
  .about-page h1 { font-size: 2.2rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .plate-card img { transition: none; }
}