/* ==========================================================================
   RINGMARK — bird observatory, Helgoland
   Batch four: the bold Swiss language of batch three, now with photography.
   The rule the two media follow is that they never sit on top of each other —
   scenes run full-bleed with the pattern bands *beside* them, and only the
   cut-out objects are composited, onto a pattern plate that is their surface.
   Every decorative field takes `transparent` in the background slot, so the
   ground of the page (or of the plate) is what shows through the drawing.
   Inter throughout, tracked in.
   ========================================================================== */

.page {
  /* The five values every page in this batch is built from: the ground it is
     printed on, the ink it is printed in, one accent, one grey, and one panel
     tone a shade off the ground. Nothing else is coloured. */
  --ground: #efede3;
  --ink: #16180f;
  --accent: #6b7f1e;
  --grey: #8c8b7c;
  --panel: #dedcce;

  --edge: clamp(1.15rem, 3.4vw, 4.5rem);
  --gap: clamp(1.2rem, 2.6vw, 3rem);

  font-family: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  letter-spacing: -0.018em;
  font-variant-numeric: tabular-nums;
  background: var(--ground);
  color: var(--ink);
  line-height: 1.45;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}

.page :where(a) {
  color: inherit;
  text-decoration: none;
}

.page :focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.page img {
  display: block;
  width: 100%;
  height: auto;
}

/* ----------------------------------------------------------------- top bar */

.bar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: var(--gap);
  padding: 0.85rem var(--edge);
  background: color-mix(in srgb, var(--ground) 86%, transparent);
  backdrop-filter: blur(12px);
}

.mark {
  font-size: clamp(1rem, 1.5vw, 1.25rem);
  font-weight: 800;
  letter-spacing: -0.044em;
}

.bar nav {
  display: flex;
  justify-content: center;
  gap: clamp(0.9rem, 2.4vw, 2.4rem);
  flex-wrap: wrap;
}

.bar nav a {
  font-size: 0.82rem;
  font-weight: 500;
  color: color-mix(in srgb, var(--ink) 66%, transparent);
}

.bar nav a:hover {
  color: var(--accent);
}

.now {
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--grey);
}

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

.hero {
  position: relative;
  isolation: isolate;
  padding: clamp(2.5rem, 7vw, 7rem) var(--edge) clamp(2rem, 5vw, 4rem);
  min-height: min(88svh, 56rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.heroField {
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.72;
  /* The fade reaches full strength below the kicker, not above it: six-point
     caps in the accent cannot survive the densest part of a field. */
  mask-image: linear-gradient(180deg, transparent 0%, #000 28%, #000 52%, transparent 96%);
}

.heroKicker {
  margin: 0 0 clamp(1.4rem, 3vw, 2.6rem);
  font-size: clamp(0.68rem, 0.95vw, 0.8rem);
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
}

.heroType {
  margin: 0;
  display: grid;
  font-size: clamp(2.8rem, 11.5vw, 13rem);
  font-weight: 800;
  line-height: 0.86;
  letter-spacing: -0.048em;
}

.heroType span:last-child {
  padding-left: 0.1em;
}

.hi {
  color: var(--accent);
}

.heroFoot {
  margin-top: clamp(2rem, 5vw, 4rem);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: var(--gap);
}

.heroFoot p {
  margin: 0;
  max-width: 42ch;
  font-size: clamp(1rem, 1.5vw, 1.35rem);
  line-height: 1.32;
  letter-spacing: -0.026em;
  color: color-mix(in srgb, var(--ink) 78%, transparent);
}

.cta {
  padding: 0.72em 1.4em;
  background: var(--accent);
  color: var(--ground) !important;
  font-size: clamp(0.85rem, 1.15vw, 1rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.cta:hover {
  background: var(--ink);
}

/* ------------------------------------------------------------- photography
   Scenes are never a backdrop for anything: full width, nothing over them,
   and a caption in the margin beneath. */

.bleed {
  margin: 0;
}

.bleed img {
  aspect-ratio: 2.4 / 1;
  object-fit: cover;
}

.bleed figcaption,
.pair figcaption {
  margin-top: 0.7rem;
  font-size: 0.7rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--grey);
}

.bleed figcaption {
  padding: 0 var(--edge);
}

.pair {
  margin: clamp(2.5rem, 6vw, 5rem) 0 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr);
  gap: clamp(1rem, 3vw, 2.4rem);
  align-items: end;
}

.pair figure {
  margin: 0;
}

.pair img {
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.pair figure:last-child img {
  aspect-ratio: 4 / 3;
}


/* ----------------------------------------------------------------- species
   The year's list set as one continuous block of display type: read as a
   list, seen as a texture, which is roughly how a ringing total feels. */

.species,
.making,
.principles,
.listing {
  padding: clamp(3.5rem, 9vw, 9rem) var(--edge);
}

.speciesList {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  column-gap: clamp(1rem, 2.4vw, 2.4rem);
  row-gap: clamp(0.1rem, 0.6vw, 0.5rem);
}

.speciesList li {
  font-size: clamp(1.2rem, 3.4vw, 3.1rem);
  font-weight: 650;
  line-height: 1.08;
  letter-spacing: -0.042em;
  color: color-mix(in srgb, var(--ink) 88%, transparent);
  transition: color 0.15s ease;
}

.speciesList li:hover {
  color: var(--accent);
}

.speciesList li i {
  font-style: normal;
  font-size: 0.3em;
  font-weight: 700;
  letter-spacing: 0.06em;
  vertical-align: 0.95em;
  margin-left: 0.22em;
  color: var(--grey);
}

/* -------------------------------------------------------------- statement */

.statement {
  padding: clamp(3.5rem, 10vw, 10rem) var(--edge) clamp(2.5rem, 7vw, 6rem);
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  gap: clamp(1.6rem, 5vw, 5rem);
  align-items: start;
}

.big {
  margin: 0;
  font-size: clamp(1.5rem, 3.5vw, 3.4rem);
  font-weight: 550;
  line-height: 1.08;
  letter-spacing: -0.04em;
  text-wrap: pretty;
}

.statementMeta p {
  margin: 0 0 1.1rem;
  max-width: 46ch;
  font-size: clamp(0.92rem, 1.05vw, 1.02rem);
  color: color-mix(in srgb, var(--ink) 66%, transparent);
}

/* ------------------------------------------------------- section headings */

.secHead {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: var(--gap);
  align-items: end;
  margin-bottom: clamp(1.8rem, 4vw, 3.4rem);
}

.secHead h2 {
  margin: 0;
  font-size: clamp(2.2rem, 7.2vw, 6.6rem);
  font-weight: 800;
  line-height: 0.86;
  letter-spacing: -0.047em;
}

.secHead p {
  margin: 0 0 0.4rem;
  max-width: 44ch;
  font-size: clamp(0.9rem, 1.05vw, 1.02rem);
  color: color-mix(in srgb, var(--ink) 60%, transparent);
}

/* ------------------------------------------------------------- band, coda */

.band,
.coda {
  position: relative;
  height: clamp(150px, 24vw, 340px);
  overflow: hidden;
  background: var(--ground);
}

.coda {
  height: clamp(130px, 20vw, 290px);
}

/* ------------------------------------------------------------------ making */

.rows {
  list-style: none;
  margin: 0;
  padding: 0;
}

.rows li {
  display: grid;
  grid-template-columns: 4rem minmax(0, 7fr) minmax(0, 10fr) 7rem;
  align-items: center;
  column-gap: var(--gap);
  padding: clamp(0.9rem, 2vw, 1.6rem) clamp(0.5rem, 1.2vw, 1.1rem);
  margin: 0 clamp(-0.5rem, -1.2vw, -1.1rem);
  transition: background 0.18s ease, color 0.18s ease;
}

.rows li:nth-child(odd) {
  background: color-mix(in srgb, var(--ink) 5%, transparent);
}

.rows li:hover {
  background: var(--accent);
  color: var(--ground);
}

.rows li:hover .rowN,
.rows li:hover .rowSub {
  color: color-mix(in srgb, var(--ground) 76%, transparent);
}

.rowN {
  align-self: start;
  padding-top: 0.6em;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent);
}

.rowTitle {
  margin: 0;
  font-size: clamp(1.6rem, 4.4vw, 4rem);
  font-weight: 700;
  line-height: 0.96;
  letter-spacing: -0.044em;
}

.rowSub {
  font-size: clamp(0.86rem, 1.1vw, 1.02rem);
  letter-spacing: -0.022em;
  color: color-mix(in srgb, var(--ink) 70%, transparent);
}

.rowDays {
  text-align: right;
  font-size: clamp(0.95rem, 1.4vw, 1.25rem);
  font-weight: 700;
  letter-spacing: -0.035em;
}

/* -------------------------------------------------------------- principles
   The composite: a pattern field on a transparent ground *is* the surface,
   and the cut-out object sits on it with a CSS shadow to seat it. */

.pGrid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1.4rem, 3.5vw, 3.5rem);
}

.pPlate {
  position: relative;
  aspect-ratio: 5 / 4;
  overflow: hidden;
  background: var(--panel);
  margin-bottom: clamp(1rem, 2vw, 1.6rem);
}

.pField {
  position: absolute;
  inset: 0;
  opacity: 0.55;
}

.pObject {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 66%;
  height: 66%;
  object-fit: contain;
  filter: drop-shadow(0 18px 26px rgb(0 0 0 / 0.45));
}

.pN {
  margin: 0 0 0.5rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--accent);
}

.pGrid h3 {
  margin: 0 0 0.7rem;
  font-size: clamp(1.15rem, 2vw, 1.85rem);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.04em;
}

.pBody {
  margin: 0;
  max-width: 44ch;
  font-size: clamp(0.9rem, 1.02vw, 1rem);
  color: color-mix(in srgb, var(--ink) 68%, transparent);
}

/* ------------------------------------------------- long tables, borderless */

.table {
  list-style: none;
  margin: 0;
  padding: 0;
}

.table li {
  display: grid;
  grid-template-columns: 6rem minmax(0, 2.4fr) minmax(0, 1.6fr) minmax(0, 1.2fr) minmax(0, 1.8fr);
  gap: var(--gap);
  align-items: baseline;
  padding: clamp(0.62rem, 1.1vw, 0.95rem) clamp(0.5rem, 1.2vw, 1.1rem);
  margin: 0 clamp(-0.5rem, -1.2vw, -1.1rem);
  font-size: clamp(0.88rem, 1.05vw, 1rem);
  transition: background 0.15s ease;
}

.table li:nth-child(even) {
  background: color-mix(in srgb, var(--ink) 5%, transparent);
}

.table li:hover {
  background: color-mix(in srgb, var(--accent) 18%, transparent);
}

.tKey {
  font-weight: 700;
  color: var(--accent);
}

.tMain {
  font-size: clamp(1rem, 1.5vw, 1.32rem);
  font-weight: 650;
  letter-spacing: -0.036em;
}

.tMid {
  color: color-mix(in srgb, var(--ink) 66%, transparent);
}

.tEnd {
  text-align: right;
  color: color-mix(in srgb, var(--ink) 80%, transparent);
}

/* ------------------------------------------------------------------- quote */

/* No ground of its own: the band sits on the page colour and is separated
   from its neighbours by the pattern alone, which is drawn on a transparent
   slot so the page shows straight through it. */
.quote {
  position: relative;
  isolation: isolate;
  padding: clamp(4rem, 12vw, 12rem) var(--edge);
  overflow: hidden;
}

/* Held well down and cleared through the middle: the page colour is what
   shows through the pattern, so it reads as a texture on the ground rather
   than as a panel laid over it, and the words sit on clean paper. */
.quoteField {
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.34;
  mask-image: radial-gradient(
    ellipse 52% 64% at 50% 50%,
    transparent 0%,
    rgb(0 0 0 / 0.3) 56%,
    #000 100%
  );
}

.quote blockquote {
  margin: 0 auto;
  text-align: center;
}

/* The measure is on the paragraph, where `ch` resolves against the display
   size rather than the blockquote's body size. */
.quote p {
  margin: 0 auto;
  max-width: 24ch;
  font-size: clamp(1.5rem, 4.4vw, 4.1rem);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.042em;
  text-wrap: balance;
}

.quote cite {
  display: block;
  margin-top: clamp(1.4rem, 3vw, 2.4rem);
  font-style: normal;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--ink) 52%, transparent);
}

/* ------------------------------------------------------------------- visit */

.visit {
  position: relative;
  isolation: isolate;
  padding: clamp(3.5rem, 9vw, 9rem) var(--edge);
  overflow: hidden;
}

/* Was a panel-coloured slab. Now the page ground with a pattern held well
   down, so the column grid reads against a texture rather than a change of
   surface. */
.visitField {
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.22;
}

.visit h2 {
  margin: 0 0 clamp(1.8rem, 4vw, 3.2rem);
  font-size: clamp(2.2rem, 7.2vw, 6.6rem);
  font-weight: 800;
  line-height: 0.86;
  letter-spacing: -0.047em;
}

.visitList {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(1.6rem, 4vw, 3.6rem);
}

.visitList dt {
  margin-bottom: 0.5rem;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
}

.visitList dd {
  margin: 0;
  max-width: 32ch;
  font-size: clamp(0.98rem, 1.2vw, 1.1rem);
  line-height: 1.34;
  letter-spacing: -0.026em;
}

/* ----------------------------------------------------------------- contact */

/* The field is the headline's equal here, so its label is carried by the
   heading above it and the <label> itself is only for a screen reader. */
.srOnly {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.contact {
  padding: clamp(4rem, 11vw, 11rem) var(--edge);
}

.signupTitle {
  margin: 0 0 clamp(1.6rem, 3.6vw, 3rem);
  max-width: 16ch;
  font-size: clamp(2.4rem, 8vw, 7.4rem);
  font-weight: 800;
  line-height: 0.86;
  letter-spacing: -0.05em;
}

/* One field the width of the page: the strip is the section, so it gets the
   measure the display type would otherwise have taken. */
.signup {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.6rem;
  max-width: 58rem;
}

.signup input {
  font: inherit;
  font-size: clamp(1rem, 1.8vw, 1.6rem);
  color: inherit;
  background: color-mix(in srgb, var(--ink) 7%, transparent);
  border: 0;
  border-radius: 0;
  padding: clamp(0.9rem, 1.8vw, 1.5rem) clamp(1rem, 2vw, 1.7rem);
}

.signup input::placeholder {
  color: color-mix(in srgb, var(--ink) 32%, transparent);
}

.signup input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.signup button {
  font: inherit;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  background: var(--accent);
  color: var(--ground);
  border: 0;
  border-radius: 0;
  padding: 0 clamp(1.6rem, 3vw, 2.8rem);
  cursor: pointer;
}

.signupMeta {
  margin: clamp(1.6rem, 3.5vw, 2.8rem) 0 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1.4rem, 3vw, 2.6rem);
  max-width: 58rem;
}

.signupMeta div {
  display: grid;
  gap: 0.4rem;
  align-content: start;
}

.signupMeta dt {
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
}

.signupMeta dd {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.45;
  color: color-mix(in srgb, var(--ink) 74%, transparent);
}

.contactPre {
  margin: 0 0 clamp(1rem, 2.4vw, 2rem);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--grey);
}


.contactFine {
  margin: clamp(1.6rem, 3.5vw, 3rem) 0 0;
  max-width: 48ch;
  font-size: clamp(0.9rem, 1.05vw, 1rem);
  color: color-mix(in srgb, var(--ink) 62%, transparent);
}

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

.footer {
  padding: clamp(2.5rem, 6vw, 5rem) var(--edge) clamp(1.6rem, 3vw, 2.6rem);
}

/* The footer opens with an object rather than a numeral. It sits on a pattern
   plate — the page's own device for a cut-out — drawn on a transparent slot so
   the plate is texture on the page rather than a panel laid over it. */
.footObject {
  margin: 0 0 clamp(2.2rem, 5.5vw, 4.5rem);
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(1.6rem, 4vw, 3.5rem);
  align-items: center;
}

.footPlate {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  width: clamp(150px, 19vw, 268px);
  aspect-ratio: 1 / 1;
  display: grid;
  place-items: center;
}

.footPlateField {
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.3;
}

.footCut {
  width: 80%;
  height: auto;
}

.footLine {
  margin: 0;
  max-width: 19ch;
  font-size: clamp(1.45rem, 3.4vw, 3.1rem);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.036em;
  text-wrap: balance;
}

.footGrid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1.6rem, 4vw, 3.5rem);
}

.footGrid h2 {
  margin: 0 0 1rem;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
}

.footGrid ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.footGrid a,
.footGrid p {
  font-size: clamp(0.92rem, 1.1vw, 1.05rem);
  color: color-mix(in srgb, var(--ink) 84%, transparent);
}

.footGrid p {
  margin: 0;
  line-height: 1.6;
}

.footGrid a:hover {
  color: var(--accent);
}

.footFine {
  margin-top: clamp(2.5rem, 6vw, 5rem);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap);
}

.footFine p {
  margin: 0;
  font-size: 0.74rem;
  color: color-mix(in srgb, var(--ink) 46%, transparent);
}

.footFine a {
  color: color-mix(in srgb, var(--ink) 74%, transparent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

@media (max-width: 1100px) {
  .statement,
  .secHead {
    grid-template-columns: 1fr;
  }

  .secHead p {
    margin-bottom: 0;
  }

  .pGrid,
  .visitList {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    row-gap: clamp(1.8rem, 5vw, 3rem);
  }

  .rows li {
    grid-template-columns: 3rem minmax(0, 1fr) 6rem;
    grid-template-areas: 'n title days' 'n sub days';
    row-gap: 0.3rem;
  }

  .rowN { grid-area: n; }
  .rowTitle { grid-area: title; }
  .rowSub { grid-area: sub; }
  .rowDays { grid-area: days; align-self: center; }

  .table li {
    grid-template-columns: 5rem minmax(0, 1fr) minmax(0, 1fr);
    grid-template-areas: 'key main main' 'key mid1 end' 'key mid2 end';
    row-gap: 0.1rem;
  }

  .tKey { grid-area: key; }
  .tMain { grid-area: main; }
  .tMid:nth-of-type(3) { grid-area: mid1; font-size: 0.86rem; }
  .tMid:nth-of-type(4) { grid-area: mid2; font-size: 0.86rem; }
  .tEnd { grid-area: end; }
}

@media (max-width: 860px) {
  .heroFoot {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .cta {
    justify-self: start;
  }

  .pair {
    grid-template-columns: 1fr;
  }

  .pair img,
  .pair figure:last-child img {
    aspect-ratio: 4 / 3;
  }

  .bleed img {
    aspect-ratio: 4 / 3;
  }
}

@media (max-width: 680px) {
  .bar {
    grid-template-columns: 1fr auto;
  }

  .bar nav {
    display: none;
  }

  .pGrid,
  .visitList,
  .footGrid,
  .footFine {
    grid-template-columns: 1fr;
  }

  .signup {
    grid-template-columns: 1fr;
  }

  .signup button {
    padding: 1.1rem 2.4rem;
  }

  .signupMeta {
    grid-template-columns: 1fr;
  }

  .footObject {
    grid-template-columns: 1fr;
    justify-items: start;
  }
}
