/* 12 Abismes — un descens de la superfície fins al fons.
   El degradat cap a l'abisme i el verd fluorescent lliguen tot el projecte. */

@font-face {
  font-family: "Source Serif 4"; font-style: normal; font-weight: 200 900; font-display: swap;
  src: url("fonts/source-serif-4-latin-opsz-normal.woff2") format("woff2");
}
/* La cursiva del títol i de l'entradeta: una Garamond clàssica */
@font-face {
  font-family: "EB Garamond"; font-style: italic; font-weight: 400 800; font-display: swap;
  src: url("fonts/eb-garamond-latin-wght-italic.woff2") format("woff2");
}

:root {
  --top: #1d3852;
  --abyss: #07101f;
  --floor: #02050b;
  --card: #f0f0f0;
  --ink: #e8edf3;
  --muted: rgba(232, 237, 243, 0.74);
  --faint: rgba(232, 237, 243, 0.42);
  --line: rgba(232, 237, 243, 0.16);
  --accent: #39ffb6;
  --serif: "Source Serif 4", Georgia, "Noto Serif SC", "Songti SC", "SimSun", serif;
  --italic: "EB Garamond", Garamond, Georgia, "Noto Serif SC", "Songti SC", "SimSun", serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "PingFang SC", "Microsoft YaHei", monospace;
  --gutter: clamp(1.25rem, 0.6rem + 2.6vw, 3rem);
  --ck-sig-color: var(--muted);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { background: var(--floor); -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--serif);
  /* L'aigua: ja comença fosca i es va enfosquint, sense talls, fins al fons.
     A dalt de tot, una mica de llum que arriba de la superfície. */
  background:
    radial-gradient(130vw 75svh at 50% -12svh, rgba(141, 166, 184, 0.3), transparent 70%) no-repeat,
    linear-gradient(180deg, var(--top) 0, #1a334d 7%, #172d47 16%, #132640 28%, #0f1e37 42%,
      #0b172b 58%, var(--abyss) 74%, #040a15 87%, var(--floor) 100%);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }

/* ── La superfície ───────────────────────────────────────────────────── */
.surface {
  position: relative; z-index: 1;
  min-height: 100svh;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 5rem var(--gutter) 9rem;
  text-align: center;
}
/* El logo en negre, com a la coberta del llibre */
.enso { width: clamp(7rem, 5rem + 8vw, 10rem); height: auto; margin-bottom: 2.2rem; }
h1 {
  margin: 0;
  font-family: var(--italic); font-style: italic;
  font-size: clamp(3rem, 2.1rem + 3.5vw, 5.2rem); font-weight: 400; line-height: 1;
  letter-spacing: -0.01em;
}
/* El japonès, en verd: el to de tot el projecte */
.jp {
  margin: 1rem 0 0; font-size: 1rem; letter-spacing: 0.42em;
  color: var(--accent); text-shadow: 0 0 14px rgba(57, 255, 182, 0.35);
}
.lede {
  max-width: 40ch; margin: 1.9rem 0 0;
  font-family: var(--italic); font-style: italic; font-weight: 400;
  font-size: clamp(1.2rem, 1.05rem + 0.4vw, 1.4rem); line-height: 1.5;
  color: var(--muted); text-wrap: balance;
}
/* En xinès, sense cursiva (els caràcters no en tenen) */
:root:lang(zh) h1, :root:lang(zh) .lede { font-family: var(--serif); font-style: normal; }
.eyebrow {
  margin: 1.4rem 0 0;
  font: 500 0.7rem/1.4 var(--mono); letter-spacing: 0.52em; text-transform: uppercase;
  color: var(--faint);
  padding-left: 0.52em;   /* l'espaiat també queda darrere l'última lletra: així queda ben centrat */
}
/* Al mòbil, una mica menys d'espai perquè no es parteixi en dues línies */
@media (max-width: 30rem) { .eyebrow { letter-spacing: 0.36em; padding-left: 0.36em; } }
/* Una fletxa que es dibuixa cap avall i convida a baixar */
.dive {
  position: absolute; left: 50%; bottom: clamp(1.5rem, 5svh, 3.5rem); translate: -50% 0;
  display: grid; place-items: center; width: 3rem; height: 5rem;
  color: var(--accent);
  filter: drop-shadow(0 0 6px rgba(57, 255, 182, 0.45));
}
.dive svg { width: 1.5rem; height: 4.5rem; overflow: visible; }
.dive:hover { filter: drop-shadow(0 0 10px rgba(57, 255, 182, 0.8)); }
@media (prefers-reduced-motion: no-preference) {
  .dive .stem { stroke-dasharray: 62 62; animation: draw 2.6s cubic-bezier(.6, 0, .4, 1) infinite; }
  .dive .head { animation: drop 2.6s cubic-bezier(.6, 0, .4, 1) infinite; }
  @keyframes draw { 0% { stroke-dashoffset: 62; } 55% { stroke-dashoffset: 0; } 100% { stroke-dashoffset: -62; } }
  @keyframes drop {
    0%, 30% { opacity: 0; translate: 0 -0.6rem; }
    55% { opacity: 1; translate: 0 0; }
    80% { opacity: 1; translate: 0 0.25rem; }
    100% { opacity: 0; translate: 0 0.5rem; }
  }
}

/* ── El mar ──────────────────────────────────────────────────────────── */
.sea { position: relative; z-index: 1; padding-bottom: 2rem; }

/* Les línies verdes: marques de profunditat */
.level {
  display: flex; align-items: center; gap: 0.9rem;
  width: min(100% - 2 * var(--gutter), 72rem); margin: 0 auto;
  font: 500 0.7rem/1.4 var(--mono); letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--accent);
}
.level .m { color: var(--ink); letter-spacing: 0.08em; text-transform: none; }
.level::after {
  content: ""; flex: 1; height: 1px;
  background: linear-gradient(90deg, rgba(57, 255, 182, 0.45), transparent);
}
.is-surface { padding-top: 3rem; }

.intro { width: min(100% - 2 * var(--gutter), 36rem); margin: 0 auto; padding: 12svh 0 6svh; }
.intro p { margin: 0; font-size: clamp(1.05rem, 1rem + 0.2vw, 1.15rem); line-height: 1.75; color: var(--muted); }
.intro p + p { margin-top: 1.15rem; }

/* Cada haiku: la il·lustració i el poema */
.stop {
  display: grid; gap: 2rem;
  width: min(100% - 2 * var(--gutter), 72rem); margin: 0 auto;
  padding-block: 10svh;
}
/* Cada il·lustració, com una postal, amb el número de pàgina a sota com al llibre.
   Els marges es controlen tots des d'aquí: dalt, costats i baix. */
.art {
  margin: 0; padding: 9% 6.5% 23%;
  background: var(--card);
  box-shadow: 0 40px 80px -40px rgba(0, 0, 0, 0.85);
}
.art img { width: 100%; height: auto; }
.art figcaption {
  padding-top: 3%; text-align: right;
  font: 400 0.62rem/1 var(--serif); letter-spacing: 0.04em; color: #595959;
}
.poem { display: grid; gap: 1.5rem; align-content: center; container: poem / inline-size; }
.mark {
  display: flex; align-items: center; gap: 0.9rem; margin: 0;
  font: 500 0.72rem/1 var(--mono); letter-spacing: 0.16em; color: var(--accent);
}
.mark .n::after {
  content: ""; display: inline-block; width: 2.2rem; height: 1px; margin-left: 0.9rem;
  vertical-align: middle; background: currentColor; opacity: 0.6;
}
.mark .m { color: var(--faint); letter-spacing: 0.08em; }
.verse { display: flex; align-items: flex-start; gap: clamp(1.25rem, 3vw, 2.5rem); }
.haiku {
  margin: 0;
  font-size: clamp(1.3rem, 1.05rem + 0.7vw, 1.7rem); line-height: 1.42; font-weight: 380;
  color: var(--ink);
}
.haiku span, .alt span { display: block; }
/* Si un vers no hi cap, la continuació entra una mica, com als llibres de poesia */
.haiku:not(:lang(zh)) span { padding-left: 1.2em; text-indent: -1.2em; }
/* La versió xinesa, en columnes, com al llibre */
.alt {
  margin: 0; writing-mode: vertical-rl;
  font-size: 0.95rem; line-height: 1.9; letter-spacing: 0.24em;
  color: rgba(57, 255, 182, 0.72);
}
.alt:empty { display: none; }
/* Si no hi cap al costat, la versió xinesa passa a sota, en línies */
@container poem (max-width: 34rem) {
  .stop:nth-of-type(n) .poem .verse { flex-direction: column; gap: 1.1rem; }
  .alt { writing-mode: horizontal-tb; letter-spacing: 0.14em; line-height: 1.75; }
}
@media (min-width: 60rem) {
  @container poem (max-width: 34rem) { .stop:nth-of-type(even) .poem .verse { align-items: flex-end; } }
}
/* En xinès, el haiku principal ja va en columnes */
:root:lang(zh) .haiku {
  writing-mode: vertical-rl;
  font-size: clamp(1.25rem, 1.1rem + 0.6vw, 1.6rem); line-height: 2; letter-spacing: 0.2em;
}

@media (min-width: 60rem) {
  .stop {
    width: min(100% - 2 * clamp(9.5rem, 12vw, 12rem), 70rem);
    min-height: 100svh;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center; gap: clamp(3rem, 6vw, 6rem);
  }
  .art { width: min(100%, 68svh); }
  .stop:nth-of-type(odd) .art { margin-left: auto; }
  .stop:nth-of-type(even) .art { order: 2; margin-right: auto; }
  .stop:nth-of-type(even) .poem { justify-items: end; text-align: right; }
  .stop:nth-of-type(even) .verse { flex-direction: row-reverse; }
  .level { width: min(100% - 2 * clamp(9.5rem, 12vw, 12rem), 70rem); }
}

/* Apareixen com qui surt de la foscor */
@media (prefers-reduced-motion: no-preference) {
  .js .art { opacity: 0; translate: 0 1.5rem; transition: opacity 1.2s ease, translate 1.2s ease; }
  .js .is-in .art { opacity: 1; translate: 0 0; }
  .js .mark, .js .haiku span, .js .alt span { opacity: 0; translate: 0 0.5rem; transition: opacity 1s ease, translate 1s ease; }
  .js .alt span { translate: 0 -0.5rem; }
  .js .is-in .mark, .js .is-in .haiku span, .js .is-in .alt span { opacity: 1; translate: 0 0; }
  .js .is-in .mark { transition-delay: 0.3s; }
  .js .is-in .haiku span:nth-child(1) { transition-delay: 0.55s; }
  .js .is-in .haiku span:nth-child(2) { transition-delay: 0.95s; }
  .js .is-in .haiku span:nth-child(3) { transition-delay: 1.35s; }
  .js .is-in .alt span:nth-child(1) { transition-delay: 1.7s; }
  .js .is-in .alt span:nth-child(2) { transition-delay: 1.9s; }
  .js .is-in .alt span:nth-child(3) { transition-delay: 2.1s; }
}

/* ── El fons ─────────────────────────────────────────────────────────── */
.seabed { padding: 14svh 0 4rem; text-align: center; }
.seabed h2 { margin: 16svh var(--gutter) 0.8rem; font-size: clamp(1.8rem, 1.4rem + 1.4vw, 2.6rem); font-weight: 400; line-height: 1.15; }
.seabed > p:not(.level) { max-width: 34rem; margin: 0 auto; padding-inline: var(--gutter); color: var(--muted); line-height: 1.6; text-wrap: balance; }
.books {
  list-style: none; margin: 2.2rem auto 0; padding: 0 var(--gutter);
  display: flex; flex-wrap: wrap; justify-content: center; gap: 0.8rem;
}
.books a {
  display: grid; justify-items: center; gap: 0.3rem;
  min-width: 10.5rem; padding: 0.9rem 1.5rem;
  border: 1px solid rgba(57, 255, 182, 0.55); border-radius: 999px;
  text-decoration: none; transition: background-color 0.25s, color 0.25s, border-color 0.25s;
}
.books span { font-size: 1.1rem; }
@media (max-width: 34rem) {
  .books { flex-direction: column; align-items: center; }
  .books a { width: min(100%, 15rem); }
}
.books small { font: 500 0.66rem/1 var(--mono); letter-spacing: 0.12em; color: var(--accent); transition: color 0.25s; }
.books a:hover { background: var(--accent); border-color: var(--accent); color: var(--abyss); }
.books a:hover small { color: var(--abyss); }
.ascend {
  display: inline-flex; align-items: center; gap: 0.55rem; margin-top: 4.5rem;
  font: 500 0.72rem/1 var(--mono); letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--muted); text-decoration: none; transition: color 0.25s;
}
.ascend svg { width: 1rem; height: 1rem; }
.ascend:hover { color: var(--accent); }

.footer { position: relative; z-index: 1; }

/* ── El profundímetre ────────────────────────────────────────────────── */
/* Com el d'un submarí: una cinta amb l'escala que es mou, una línia verda que marca on ets
   i uns números que roden. Al mòbil queda petit, a dalt a l'esquerra. */
.probe {
  position: fixed; z-index: 5;
  left: 1.3rem; top: 0.8rem;
  display: flex; align-items: center; gap: 0.5rem;
  height: 2rem; padding: 0 0.85rem 0 0.4rem;
  border-radius: 999px;
  background: rgba(2, 5, 11, 0.6);
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
  opacity: 0; visibility: hidden; transition: opacity 0.6s, visibility 0.6s;
}
.probe.is-on { opacity: 1; visibility: visible; }
.tape { position: relative; width: 1.1rem; height: 1.6rem; }
.tape canvas {
  position: absolute; inset: 0; width: 100%; height: 100%;
  -webkit-mask-image: linear-gradient(transparent, #000 30%, #000 70%, transparent);
  mask-image: linear-gradient(transparent, #000 30%, #000 70%, transparent);
}
.cursor {
  position: absolute; left: 0; right: 0; top: 50%; height: 1px;
  background: var(--accent); box-shadow: 0 0 6px rgba(57, 255, 182, 0.8);
}
.marks { display: none; }
.readout {
  display: flex; align-items: baseline; gap: 0.25rem;
  font: 600 0.78rem/1 var(--mono); color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.odo { display: inline-flex; }
.odo .sign { display: inline-block; width: 0.75em; text-align: center; }
.odo .wheel { display: inline-block; height: 1em; overflow: hidden; transition: opacity 0.4s; }
.odo .strip { display: flex; flex-direction: column; }
.odo .strip span { height: 1em; line-height: 1em; }
.odo .wheel.is-lead, .odo .sign.is-zero { opacity: 0.28; }
.unit { font-size: 0.75em; font-weight: 500; opacity: 0.8; }
.trend { display: inline-block; width: 0.8em; font-size: 0.7em; opacity: 0; transition: opacity 0.5s; }
.trend.is-on { opacity: 1; }
.meta { display: none; }

@media (min-width: 60rem) {
  .probe {
    left: clamp(1.25rem, 2.5vw, 2.75rem); top: 50%; translate: 0 -50%;
    flex-direction: column; align-items: flex-start; gap: 1rem;
    height: auto; padding: 0;
    background: none; -webkit-backdrop-filter: none; backdrop-filter: none;
  }
  .tape { width: 4.6rem; height: min(46svh, 24rem); }
  .tape canvas {
    -webkit-mask-image: linear-gradient(transparent, #000 16%, #000 84%, transparent);
    mask-image: linear-gradient(transparent, #000 16%, #000 84%, transparent);
  }
  .cursor { left: auto; right: -0.35rem; width: 1.6rem; }
  .cursor::after {
    content: ""; position: absolute; right: -0.1rem; top: -0.25rem;
    border: 0.25rem solid transparent; border-right-color: var(--accent);
  }
  /* Les marques dels haikus: s'hi pot clicar per anar-hi */
  .marks { display: block; position: absolute; inset: 0; }
  .marks a {
    position: absolute; left: calc(100% + 0.7rem); top: 0; translate: 0 -50%;
    padding: 0.25rem 0.3rem;
    font: 500 0.62rem/1 var(--mono); letter-spacing: 0.1em; color: var(--faint); text-decoration: none;
    transition: color 0.3s;
  }
  .marks a::before {
    content: ""; display: inline-block; width: 0.45rem; height: 1px; margin-right: 0.35rem;
    vertical-align: middle; background: currentColor;
  }
  .marks a:hover { color: var(--ink); }
  .marks a[aria-current] { color: var(--accent); }
  .readout { font-size: 1.05rem; gap: 0.3rem; }
  .meta {
    display: grid; gap: 0.35rem; margin: -0.35rem 0 0;
    font: 500 0.62rem/1 var(--mono); letter-spacing: 0.08em; color: var(--faint);
    font-variant-numeric: tabular-nums;
  }
}

/* ── La neu marina ───────────────────────────────────────────────────── */
.snow { position: fixed; inset: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; }