/* fathom — 스타일 (4단계)
 * 두 겹이다. 기본 = 정지 카탈로그(reduced-motion · WebGL 없음 · 스크립트 막힘 · #mode=still) — 장면마다 물빛 단색 띠 + 정지 컷 + 글자.
 * html.motion = 3D 무대(sticky) + 장면 트랙 + 줄 마스크 스크럽. 마스크 전 상태(줄 숨김)는 html.motion 아래에만 있다.
 * 색은 tokens.css 의 변수만 쓴다. 지역 변수(--fg · --scrim · --rail-*)도 토큰을 가리킬 뿐이다.
 */

/* ── 리셋 ─────────────────────────────────────────────────────────────── */
:where(*, *::before, *::after) { box-sizing: border-box; }
:where(body, h1, h2, h3, p, figure, dl, dd, ol, table) { margin: 0; }
:where(ol) { padding: 0; list-style: none; }
:where(img, svg, canvas) { display: block; max-width: 100%; }
:where(button) { font: inherit; color: inherit; }
:where(a) { color: inherit; }

html {
  --fg: var(--color-foam);
  --focus: var(--shadow-focus);
  --rail-bg: var(--color-bg);
  background: var(--color-bg);
  color: var(--color-foam);
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  word-break: keep-all;
}

:focus-visible { outline: none; box-shadow: var(--focus); }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip {
  position: absolute;
  left: var(--spacing-gutter);
  top: var(--spacing-2);
  z-index: 30;
  padding: var(--spacing-3) var(--spacing-4);
  background: var(--color-foam);
  color: var(--color-ink);
  font-size: var(--text-small);
  text-decoration: none;
  transform: translateY(-200%);
}
.skip:focus-visible { transform: none; box-shadow: var(--shadow-focus); }

.link {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

/* ── 머리 — 수심 자(ruler) ─────────────────────────────────────────────── */
.ruler {
  position: fixed;
  z-index: 20;
  inset: 0;
  pointer-events: none;
  color: var(--fg);
}
.ruler a { pointer-events: auto; text-decoration: none; }
.ruler::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: var(--spacing-rail);
  background: var(--rail-bg);
  transition: background-color var(--duration-flip) var(--ease-in-out-sine);
}
.r-mark {
  position: absolute;
  top: var(--spacing-6);
  left: 0;
  width: var(--spacing-rail);
  display: flex;
  justify-content: center;
  padding-block: var(--spacing-2);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-rule);
  letter-spacing: 0.24em;
  line-height: 1;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}
.r-read {
  position: absolute;
  left: 0;
  bottom: var(--spacing-6);
  width: var(--spacing-rail);
  text-align: center;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-rule);
  font-feature-settings: "tnum";
  white-space: nowrap;
}
.v-live { display: none; }
.motion .v-live { display: inline; }
.motion .v-still { display: none; }
.r-nav {
  position: absolute;
  left: 0;
  width: var(--spacing-rail);
  top: calc(var(--spacing-6) + 7.5rem);
  bottom: calc(var(--spacing-6) + var(--spacing-12));
}
/* 자의 세로 1px 선 */
.r-nav::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: color-mix(in srgb, var(--fg) 55%, transparent);
}
.r-ticks li {
  position: absolute;
  left: 8px;
  top: var(--a);
  width: 12px;
  height: 1px;
  background: var(--fg);
}
.r-ticks span {
  position: absolute;
  left: 16px;
  top: -0.6em;
  font-family: var(--font-display);
  font-size: 11px;
  font-feature-settings: "tnum";
  line-height: 1.2;
  white-space: nowrap;
}
.r-zone {
  position: absolute;
  left: 0;
  right: 0;
  top: var(--a);
  height: calc(var(--b) - var(--a));
}
.r-zone a {
  display: flex;
  align-items: center;
  height: 100%;
  min-height: 44px;
  padding-left: 24px;
  font-size: var(--text-field);
  font-weight: 500;
  line-height: 1.2;
}
.r-zone a[aria-current] .r-name { text-decoration: underline; text-underline-offset: 0.25em; text-decoration-thickness: 1px; }
.r-now { display: none; }
.motion .r-now {
  display: block;
  position: absolute;
  left: 7px;
  top: var(--now, 0%);
  width: 16px;
  height: 0;
}
.r-bar {
  position: absolute;
  left: 0;
  top: -1px;
  width: 16px;
  height: 2px;
  background: var(--fg);
}
/* 판독 점 — 1,000 m 아래에서만(잠수정 등이 켜지는 순간과 같다). 강조색은 이 점과 3D 발광 점뿐 */
.r-dot {
  position: absolute;
  left: 18px;
  top: -3px;
  width: 6px;
  height: 6px;
  border-radius: var(--radius-dot);
  background: var(--color-accent);
  opacity: 0;
}
.ruler[data-lit] .r-dot { opacity: 1; }

/* ── 글자 블록 공통 ─────────────────────────────────────────────────────── */
.m { display: block; }
.mi { display: block; }
.field {
  font-family: var(--font-display);
  font-size: var(--text-field);
  letter-spacing: 0.04em;
  line-height: 1.4;
}
.meter {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--text-depth);
  line-height: 0.92;
  letter-spacing: -0.03em;
  font-feature-settings: "tnum";
  margin-top: var(--spacing-3);
  white-space: nowrap;
}
.meter .unit { letter-spacing: -0.02em; }
.hero-meter { font-size: clamp(4rem, 10vw, 9rem); }
.title {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: var(--text-h1);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-top: var(--spacing-4);
  padding-bottom: 0.06em;
}
.title .ln { white-space: nowrap; }
.lead { margin-top: var(--spacing-4); max-width: 34em; font-size: var(--text-lead); line-height: 1.55; }
.fict { margin-top: var(--spacing-2); font-size: var(--text-small); }
.zone {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: var(--text-zone);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-top: var(--spacing-3);
  padding-bottom: 0.08em;
}
.quote {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: var(--text-quote);
  line-height: 1.3;
  margin-top: var(--spacing-2);
  padding-bottom: 0.1em;
  text-wrap: balance;
}
.para { margin-top: var(--spacing-4); }
.para-p { font-size: var(--text-lead); line-height: 1.65; max-width: 34em; text-wrap: pretty; }
.read {
  display: none;
  min-height: 44px;
  min-width: 44px;
  padding: 0;
  border: 0;
  background: none;
  font-size: var(--text-small);
  font-weight: 500;
  cursor: pointer;
  pointer-events: auto;
  -webkit-user-select: none;
  user-select: none;
  align-items: center;
  gap: var(--spacing-2);
}
.read::after {
  content: "+";
  font-family: var(--font-display);
  font-size: 1.125rem;
  line-height: 1;
  transition: transform 160ms var(--ease-out-quad);
}
.read[aria-expanded="true"]::after { transform: rotate(45deg); }
.figs { display: flex; flex-wrap: wrap; gap: var(--spacing-4) var(--spacing-12); margin-top: var(--spacing-6); }
.fig { display: flex; flex-direction: column-reverse; gap: var(--spacing-1); }
.fig dd {
  font-family: var(--font-display);
  font-size: var(--text-figure);
  line-height: 1.05;
  font-feature-settings: "tnum";
  white-space: nowrap;
}
.fig dt { font-size: var(--text-field); font-weight: 500; line-height: 1.3; }
.log { border-collapse: collapse; min-width: 15rem; }
.log caption {
  text-align: left;
  font-size: var(--text-field);
  font-weight: 500;
  padding-bottom: var(--spacing-2);
}
.log th,
.log td {
  text-align: left;
  padding: var(--spacing-2) var(--spacing-6) var(--spacing-2) 0;
  border-top: 1px solid color-mix(in srgb, var(--fg) 45%, transparent);
  vertical-align: baseline;
}
.log th { font-size: var(--text-field); font-weight: 500; width: 4.5rem; }
.log td { font-family: var(--font-display); font-feature-settings: "tnum"; font-size: var(--text-body); white-space: nowrap; }
.cue { display: none; }
.cue .link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-family: var(--font-display);
  font-size: var(--text-field);
  letter-spacing: 0.04em;
  pointer-events: auto;
}

/* ── 무대 — 기본(카탈로그)에서는 없다 ──────────────────────────────────── */
.stage { display: none; }

/* ── 정지 카탈로그 (기본 배치) — 장면마다 물빛 단색 띠, 위에서 아래로 깊어진다 ─ */
.scene {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--spacing-6);
  padding: var(--spacing-12) calc(var(--spacing-gutter) + var(--spacing-rail-m)) var(--spacing-12) var(--spacing-gutter);
  color: var(--fg);
  background: var(--band);
}
.scene[data-band="0"] { --band: var(--color-water-0); --fg: var(--color-ink); --focus: var(--shadow-focus-shallow); }
.scene[data-band="50"] { --band: var(--color-water-50); --fg: var(--color-ink); --focus: var(--shadow-focus-shallow); }
.scene[data-band="200"] { --band: var(--color-water-200); --fg: var(--color-foam); }
.scene[data-band="1000"] { --band: var(--color-water-1000); --fg: var(--color-foam); }
.scene[data-band="4000"] { --band: var(--color-water-4000); --fg: var(--color-foam); }
.scene[data-band="6000"] { --band: var(--color-water-6000); --fg: var(--color-foam); }
.s-surface { padding-top: calc(var(--spacing-16) + env(safe-area-inset-top)); }
.still { background: var(--color-deep); }
.still img { width: 100%; height: auto; }
.scene .copy { position: relative; }
.hadal-block { display: grid; gap: var(--spacing-8); }

/* ── 장면 7 — 선상 ──────────────────────────────────────────────────── */
.aboard {
  position: relative;
  z-index: 2;
  background: var(--color-bg);
  color: var(--color-foam);
  padding: var(--spacing-24) calc(var(--spacing-gutter) + var(--spacing-rail-m)) 0 var(--spacing-gutter);
  --fg: var(--color-foam);
  --focus: var(--shadow-focus);
}
.ab-field {
  font-family: var(--font-display);
  font-size: var(--text-field);
  letter-spacing: 0.04em;
}
.ab-title {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: var(--text-h2);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-top: var(--spacing-3);
}
.vm, .vmi { display: block; }
.vm { padding-bottom: 0.08em; }
.ab-lead { margin-top: var(--spacing-4); max-width: 34em; font-size: var(--text-lead); color: var(--color-mute); }

.crew {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--spacing-8);
  margin-top: var(--spacing-16);
}
.card { border-top: 1px solid var(--color-line); padding-top: var(--spacing-4); }
.c-role { font-size: var(--text-field); font-weight: 500; color: var(--color-mute); }
.c-name {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: var(--text-quote);
  line-height: 1.25;
  margin-top: var(--spacing-2);
}
.c-dives { margin-top: var(--spacing-3); font-size: var(--text-small); color: var(--color-mute); }
.c-n { font-family: var(--font-display); font-feature-settings: "tnum"; font-size: var(--text-figure); color: var(--color-foam); line-height: 1; }
.c-line { margin-top: var(--spacing-3); font-size: var(--text-small); max-width: 22em; }

.kit {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--spacing-12) var(--spacing-6);
  margin-top: var(--spacing-24);
  align-items: start;
}
.shot figcaption {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-1) var(--spacing-4);
  margin-top: var(--spacing-3);
  font-size: var(--text-small);
  color: var(--color-mute);
}
.shot figcaption b { font-weight: 500; color: var(--color-foam); width: 100%; }
.shot figcaption span { font-family: var(--font-display); font-feature-settings: "tnum"; }

/* 장비·관측 사진 — 직각, 바탕은 깊은 물색(받는 동안) */
.shot img { width: 100%; height: auto; background: var(--color-deep); }

.support {
  display: grid;
  gap: var(--spacing-8);
  margin-top: var(--spacing-32);
  margin-inline: calc(-1 * var(--spacing-gutter)) calc(-1 * (var(--spacing-gutter) + var(--spacing-rail-m)));
  padding: var(--spacing-16) calc(var(--spacing-gutter) + var(--spacing-rail-m)) var(--spacing-16) var(--spacing-gutter);
  background: var(--color-deep);
}
.sp-title {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: var(--text-h2);
  line-height: 1.15;
  letter-spacing: -0.02em;
}
.sp-line { margin-top: var(--spacing-4); max-width: 30em; color: var(--color-mute); font-size: var(--text-lead); }
.sp-act { display: flex; flex-wrap: wrap; align-items: center; gap: var(--spacing-4) var(--spacing-8); align-self: end; }
.sp-act .link { display: inline-flex; align-items: center; min-height: 48px; }
.sp-done { width: 100%; font-size: var(--text-small); color: var(--color-mute); }
.sp-done:empty { display: none; }
.support[data-sent] .btn,
.support[data-sent] .sp-act .link { display: none; }
.btn {
  display: inline-flex;
  align-items: center;
  height: 48px;
  padding-inline: var(--spacing-6);
  background: var(--color-foam);
  color: var(--color-ink);
  border-radius: var(--radius-none);
  text-decoration: none;
  font-weight: 500;
  -webkit-user-select: none;
  user-select: none;
  transition: transform var(--duration-press) var(--ease-out-quad);
}
.btn:active { transform: scale(0.97); }

.foot {
  display: grid;
  gap: var(--spacing-4);
  padding-block: var(--spacing-12) calc(var(--spacing-12) + env(safe-area-inset-bottom));
}
.f-mark {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.24em;
  font-size: var(--text-small);
}
.f-note { font-size: var(--text-small); color: var(--color-mute); max-width: 40em; }
.f-nav { display: flex; flex-wrap: wrap; align-items: center; gap: var(--spacing-6); }
.f-nav .link { display: inline-flex; align-items: center; min-height: 44px; }

@media (min-width: 720px) {
  .crew { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .kit { grid-template-columns: repeat(12, minmax(0, 1fr)); }
  .shot.wide { grid-column: span 8; }
  .shot.narrow { grid-column: span 4; }
  .support { grid-template-columns: minmax(0, 1fr) auto; align-items: end; }
  .hadal-block { grid-template-columns: minmax(0, 1fr) auto; align-items: end; }
}
@media (min-width: 1024px) {
  .scene {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--spacing-12);
    align-items: end;
    padding: var(--spacing-16) var(--spacing-gutter) var(--spacing-16) calc(var(--spacing-rail) + var(--spacing-gutter));
  }
  .s-surface { padding-top: var(--spacing-16); }
  .hadal-block { grid-template-columns: minmax(0, 1fr); }
  .aboard { padding: var(--spacing-32) var(--spacing-gutter) 0 calc(var(--spacing-rail) + var(--spacing-gutter)); }
  .crew { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--spacing-6); }
  .support { margin-inline: calc(-1 * var(--spacing-gutter)); padding-inline: var(--spacing-gutter); }
  .foot { grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: var(--spacing-8); }
}

/* 1023 이하 — 자는 오른쪽 가장자리 눈금(28, 글자 0) + 왼쪽 위 한 줄 `FATHOM · 0 m` */
@media (max-width: 1023px) {
  .ruler::before { left: auto; right: 0; width: var(--spacing-rail-m); }
  .ruler::after {
    content: "";
    position: absolute;
    left: 0;
    right: var(--spacing-rail-m);
    top: 0;
    height: calc(var(--spacing-12) + env(safe-area-inset-top));
    background: linear-gradient(to bottom, var(--rail-bg), transparent);
    transition: opacity var(--duration-flip) var(--ease-in-out-sine);
  }
  .r-mark {
    z-index: 1;
    top: env(safe-area-inset-top);
    left: var(--spacing-gutter);
    width: auto;
    min-height: 44px;
    align-items: center;
    padding-block: 0;
    writing-mode: horizontal-tb;
    transform: none;
    letter-spacing: 0.2em;
  }
  .r-read {
    z-index: 1;
    top: env(safe-area-inset-top);
    bottom: auto;
    left: calc(var(--spacing-gutter) + 6.25rem);
    width: auto;
    min-height: 44px;
    display: flex;
    align-items: center;
    text-align: left;
  }
  .r-read::before { content: "·"; margin-right: var(--spacing-2); }
  .r-nav {
    left: auto;
    right: 0;
    width: var(--spacing-rail-m);
    top: calc(var(--spacing-12) + env(safe-area-inset-top));
    bottom: calc(var(--spacing-6) + env(safe-area-inset-bottom));
  }
  .r-nav::before { left: auto; right: 13px; }
  .r-ticks li { left: auto; right: 8px; width: 12px; }
  .r-ticks span { display: none; }
  /* 눈금 누름 칸 44 × 구간 높이 — 글자는 숨기고 이름은 aria-label 로 */
  .r-zone { left: auto; right: 0; width: 44px; }
  .r-zone a { padding: 0; min-height: 44px; }
  .r-name { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
  .motion .r-now { left: auto; right: 6px; }
  .r-bar { left: 0; }
  .r-dot { left: -9px; }
  .title .ln { display: block; }
  .lead-2 { display: none; }
}

/* ══ html.motion — 3D 무대 + 장면 트랙 ═════════════════════════════════ */
/* 물빛 — 150 m 에서 얕은 물(밝은 받침 + 먹 글자) → 깊은 물(어두운 받침 + 거품 글자), 240ms 교차 */
.motion { --fg: var(--color-ink); --scrim: var(--color-scrim-shallow); --rail-bg: var(--color-scrim-shallow); --focus: var(--shadow-focus-shallow); }
.motion[data-water="deep"] { --fg: var(--color-foam); --scrim: var(--color-scrim-deep); --rail-bg: var(--color-scrim-deep); --focus: var(--shadow-focus); }
.motion .ruler { transition: color var(--duration-flip) var(--ease-in-out-sine); }

.motion .walk { position: relative; }
.motion .scene.s-hadal { height: calc((var(--len) + 200) * 1svh); }
.motion .aboard { margin-top: -100svh; will-change: transform; } /* 자기 층 — 덮이기 전 무대 위쪽이 비어 보이는 합성 문제(atrium 실측) */
.motion .stage {
  display: block;
  position: sticky;
  top: 0;
  z-index: 0;
  height: 100svh;
  overflow: hidden;
  background: var(--color-water-0);
}
.motion .poster,
.motion .poster img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.motion .poster img { object-fit: cover; }
.motion .stage canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity var(--duration-cross) var(--ease-out-expo);
}
.motion .stage.live canvas { opacity: 1; }
.motion .stage.settled .poster { visibility: hidden; }

.motion .track { position: relative; z-index: 1; margin-top: -100svh; pointer-events: none; }
.motion .scene {
  display: block;
  padding: 0;
  background: none;
  color: var(--fg);
  height: calc((var(--len) + 100) * 1svh);
  transition: color var(--duration-flip) var(--ease-in-out-sine);
}
.motion .scene + .scene { margin-top: -100svh; }
.motion .s-surface { --len: 120; }
.motion .s-epipelagic { --len: 170; }
.motion .s-mesopelagic { --len: 160; }
.motion .s-bathypelagic { --len: 190; }
.motion .s-abyssopelagic { --len: 180; }
.motion .s-hadal { --len: 180; }
.motion .scene .still { display: none; }
.motion .scene .copy { position: sticky; top: 0; height: 100svh; }
.motion .block {
  position: absolute;
  z-index: 0;
  left: calc(var(--spacing-rail) + var(--spacing-gutter));
  bottom: 12svh;
  width: var(--spacing-textblock);
}
.motion .cover { width: var(--spacing-coverblock); }
.motion .hadal-block { width: min(64vw, 58rem); grid-template-columns: minmax(0, 1fr) auto; align-items: end; gap: var(--spacing-12); }
/* 받침 — 글자 블록 뒤에만. 블록 자리는 끝값 그대로(하한 .70 / .64 위), 블록 끝에서 10vw 동안 사라진다 */
.motion .block::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: -22svh -18vw -12svh calc(-1 * (var(--spacing-rail) + var(--spacing-gutter)));
  background: linear-gradient(90deg, var(--scrim) calc(100% - 22vw), transparent);
  -webkit-mask-image: linear-gradient(to top, var(--color-ink) calc(100% - 22svh), transparent);
  mask-image: linear-gradient(to top, var(--color-ink) calc(100% - 22svh), transparent);
  opacity: var(--s, 0);
}
.motion .cover::before { background: linear-gradient(90deg, var(--scrim) calc(100% - 26vw), transparent); }
/* 표층(얕은 물인데 장면은 어두운 청록) — 받침을 물색 쪽으로 낮추고(세이지 55% + water-50, 불투명 .80) 위 가장자리를 길게(qa-1 P2-1).
   먹 글자 최저 대비는 NOTES 회차 2 실측 */
.motion:not([data-water="deep"]) .s-epipelagic .block { --scrim: color-mix(in srgb, color-mix(in srgb, var(--color-shallow) 55%, var(--color-water-50)) 80%, transparent); }
.motion .s-epipelagic .block::before {
  inset: -34svh -24vw -12svh calc(-1 * (var(--spacing-rail) + var(--spacing-gutter)));
  background: linear-gradient(90deg, var(--scrim) calc(100% - 24vw), transparent);
  -webkit-mask-image: linear-gradient(to top, var(--color-ink) calc(100% - 34svh), transparent);
  mask-image: linear-gradient(to top, var(--color-ink) calc(100% - 34svh), transparent);
}
.motion .m { overflow: clip; overflow-clip-margin: 0.06em; }
.motion .scene:not(.s-surface) .mi { transform: translateY(130%); }
.motion .s-surface .mi { animation: rise var(--duration-reveal) var(--ease-out-expo) both; }
.motion .s-surface .m:nth-child(2) .mi { animation-delay: 40ms; }
.motion .s-surface .m:nth-child(3) .mi { animation-delay: 80ms; }
.motion .s-surface .m:nth-child(4) .mi { animation-delay: 120ms; }
.motion .meter { font-size: var(--text-depth); }
.motion .hero-meter { font-size: var(--text-hero); line-height: 0.86; margin-top: var(--spacing-2); }
.motion .cue {
  display: block;
  position: absolute;
  right: var(--spacing-gutter);
  bottom: 12svh;
}
.motion .ruler { animation: fade 320ms var(--ease-out-quad) both; }
@keyframes rise { from { transform: translateY(130%); } }
@keyframes fade { from { opacity: 0; } }

@media (min-width: 1024px) {
  .motion .para .read { display: none; }
}
@media (max-width: 1023px) {
  .motion .s-surface { --len: 90; }
  .motion .s-epipelagic { --len: 120; }
  .motion .s-mesopelagic { --len: 110; }
  .motion .s-bathypelagic { --len: 130; }
  .motion .s-abyssopelagic { --len: 130; }
  .motion .s-hadal { --len: 120; }
  .motion .block,
  .motion .cover,
  .motion .hadal-block {
    left: var(--spacing-gutter);
    right: calc(var(--spacing-gutter) + var(--spacing-rail-m));
    width: auto;
    bottom: max(var(--spacing-6), env(safe-area-inset-bottom));
  }
  .motion .cover { bottom: calc(max(var(--spacing-6), env(safe-area-inset-bottom)) + var(--spacing-12)); }
  .motion .hadal-block { display: block; }
  .motion .block::before {
    inset: -12svh calc(-1 * (var(--spacing-gutter) + var(--spacing-rail-m))) calc(-1 * max(var(--spacing-6), env(safe-area-inset-bottom))) calc(-1 * var(--spacing-gutter));
    background: linear-gradient(to top, var(--scrim) calc(100% - 12svh), transparent);
    -webkit-mask-image: none;
    mask-image: none;
  }
  .motion .s-epipelagic .block::before {
    inset: -26svh calc(-1 * (var(--spacing-gutter) + var(--spacing-rail-m))) calc(-1 * max(var(--spacing-6), env(safe-area-inset-bottom))) calc(-1 * var(--spacing-gutter));
    background: linear-gradient(to top, var(--scrim) calc(100% - 26svh), transparent);
    -webkit-mask-image: none;
    mask-image: none;
  }
  .motion .cover::before { inset: -12svh calc(-1 * (var(--spacing-gutter) + var(--spacing-rail-m))) calc(-1 * (max(var(--spacing-6), env(safe-area-inset-bottom)) + var(--spacing-12))) calc(-1 * var(--spacing-gutter)); background: linear-gradient(to top, var(--scrim) calc(100% - 12svh), transparent); }
  .motion .read { display: inline-flex; }
  .motion .para-p { display: none; }
  .motion .para.open .para-p { display: block; margin-top: var(--spacing-1); }
  .motion .para { margin-top: var(--spacing-1); }
  .motion .figs { margin-top: var(--spacing-2); gap: var(--spacing-2) var(--spacing-6); }
  .motion .log-wrap { display: none; margin-top: var(--spacing-3); }
  .motion .hadal-block.open .log-wrap { display: block; }
  .motion .cue { right: auto; left: var(--spacing-gutter); bottom: max(var(--spacing-3), env(safe-area-inset-bottom)); }
}
@media (max-width: 719px) {
  .meter { font-size: var(--text-depth-m); }
  .motion .meter { font-size: var(--text-depth-m); margin-top: var(--spacing-2); }
  .motion .hero-meter { font-size: var(--text-hero-m); }
  .title { font-size: var(--text-h1-m); }
  .motion .zone { margin-top: var(--spacing-1); }
  .motion .quote { margin-top: var(--spacing-1); }
  .motion .field { font-size: 11px; }
  .motion .fig dd { font-size: 1.25rem; }
  .motion .lead { margin-top: var(--spacing-3); }
}
@media (max-width: 719px) and (max-height: 700px) {
  .motion .fict { display: none; }
}

/* 굽기(#bake=) — 정지 컷을 만들 때 DOM 을 숨긴다 */
.bake .ruler,
.bake .copy,
.bake .poster,
.bake .skip { visibility: hidden; }
.bake .stage canvas { transition: none; }

/* 등장(≤600ms 한 번) — 선상, html.motion 에서만 */
.motion .aboard .vm { overflow: clip; }
.motion .aboard .vmi { transform: translateY(130%); transition: transform var(--duration-reveal) var(--ease-out-expo); }
.motion .aboard.in .vmi { transform: none; }
.motion .aboard .card { opacity: 0; transform: translateY(8px); transition: opacity 320ms var(--ease-out-quad), transform 320ms var(--ease-out-quad); }
.motion .aboard.in .card { opacity: 1; transform: none; }
.motion .aboard.in .card:nth-child(2) { transition-delay: 50ms; }
.motion .aboard.in .card:nth-child(3) { transition-delay: 100ms; }
.motion .aboard.in .card:nth-child(4) { transition-delay: 150ms; }

@media (hover: hover) and (pointer: fine) {
  .r-zone a:hover .r-name { text-decoration: underline; text-underline-offset: 0.25em; text-decoration-thickness: 1px; }
  .link:hover { text-decoration-thickness: 2px; }
}