/* Yuudachi Music. Dark water, loosely nautical: near-black depths, bone-white type, cold phosphor glow,
   one red glint far below. The page is a descent (site.js sets --d from 0 at the surface to 1 at the bottom). */
:root {
  --bg: #04070a;
  --bg-2: #081015;
  --bg-3: #0d1a20;
  --surface: #0b2129;
  --ink: #dde5e6;
  --muted: #8fa1a6;
  --faint: #56696f;
  --line: rgba(150, 215, 210, 0.1);
  --line-2: rgba(150, 215, 210, 0.22);
  --glow: #6fe0d0;
  --glow-soft: rgba(111, 224, 208, 0.1);
  --signal: #ff4d4d;
  --radius: 4px;
  --gutter: clamp(16px, 4vw, 40px);
  --max: 1120px;
  --serif: "Shippori Mincho B1", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --sans: "Zen Kaku Gothic New", "Hiragino Sans", "Yu Gothic", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
  --d: 0;
  color-scheme: dark;
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 1rem/1.7 var(--sans);
  overflow-x: hidden;
}

/* the water darkens as you descend: a faint surface tint that fades to nothing at the bottom */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -10;
  pointer-events: none;
  background: radial-gradient(140% 90% at 50% -10%, rgba(18, 58, 66, 0.55), transparent 65%);
  opacity: calc(1 - var(--d) * 0.9);
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration-color: var(--glow);
  text-underline-offset: 0.22em;
}

a:hover {
  color: var(--glow);
}

:focus-visible {
  outline: 1px solid var(--glow);
  outline-offset: 3px;
}

::selection {
  background: rgba(111, 224, 208, 0.25);
}

.skip {
  position: absolute;
  left: -9999px;
}

.skip:focus {
  left: var(--gutter);
  top: 8px;
  z-index: 10;
  background: var(--bg-3);
  padding: 6px 12px;
}

.kicker,
.cat,
.card-type,
.badge,
.facts dt,
.verse h3,
.depth,
.foot-sub,
.t-no {
  font-family: var(--mono);
}

.kicker {
  margin: 0 0 18px;
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--glow);
  opacity: 0.8;
}

/* ---- header / footer */
.top {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px var(--gutter);
  background: rgba(4, 7, 10, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.mark {
  display: flex;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
}

.mark-ja {
  font: 800 1.35rem/1 var(--serif);
  color: var(--ink);
}

.mark-en {
  font: 500 0.7rem/1 var(--mono);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.top nav a {
  font: 400 0.8rem/1 var(--mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
}

.top nav a:hover {
  color: var(--glow);
}

.foot {
  margin-top: 120px;
  padding: 36px var(--gutter) 64px;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font-size: 0.85rem;
  text-align: center;
}

.foot p {
  margin: 4px 0;
}

.foot-mark {
  font-family: var(--serif);
  color: var(--muted);
}

.foot-sub {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.social {
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---- depth gauge (fixed, bottom right) */
.depth {
  position: fixed;
  right: var(--gutter);
  bottom: 16px;
  z-index: 4;
  margin: 0;
  padding: 6px 12px;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  background: rgba(4, 7, 10, 0.72);
  border: 1px solid var(--line);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  font-variant-numeric: tabular-nums;
  pointer-events: none;
}

.depth b {
  font-weight: 500;
  color: var(--glow);
  display: inline-block;
  min-width: 4.2ch;
  text-align: right;
}

.depth[hidden] {
  display: none;
}

/* ---- hero */
.hero {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  padding: clamp(80px, 15vw, 180px) var(--gutter) clamp(72px, 11vw, 132px);
  background:
    linear-gradient(180deg, rgba(111, 224, 208, 0.07), transparent 22%),
    linear-gradient(180deg, var(--surface) 0%, #06131a 40%, var(--bg) 100%);
  border-bottom: 1px solid var(--line);
}

/* the waterline: a thin bright seam at the very top, with light falling into the water under it */
.hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(111, 224, 208, 0.5), transparent);
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: repeating-linear-gradient(96deg, transparent 0 90px, rgba(170, 235, 230, 0.025) 90px 130px, transparent 130px 240px);
  -webkit-mask-image: linear-gradient(180deg, #000, transparent 70%);
  mask-image: linear-gradient(180deg, #000, transparent 70%);
}

.chart {
  position: absolute;
  z-index: -2;
  inset: 0 -8% 0 auto;
  width: min(92%, 1100px);
  height: 100%;
  opacity: 0.35;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 35%);
  mask-image: linear-gradient(90deg, transparent, #000 35%);
}

@media (min-width: 820px) {
  .chart {
    opacity: 1;
    inset: 0 -4% 0 auto;
    width: 68%;
  }
}

.rings path {
  stroke: var(--glow);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}

.rings .idx {
  stroke-width: 1.4;
  stroke-dasharray: none;
}

.rings path:not(.idx) {
  stroke-dasharray: 2 5;
}

.soundings text {
  font: 400 11px var(--mono);
  fill: var(--glow);
  opacity: 0.5;
  letter-spacing: 0.05em;
}

.sonar circle {
  fill: none;
  stroke: var(--glow);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
  transform-box: fill-box;
  transform-origin: center;
  transform: scale(0);
  opacity: 0;
  animation: ping 7.5s cubic-bezier(0.2, 0.6, 0.35, 1) infinite;
}

.sonar circle:nth-child(2) {
  animation-delay: 2.5s;
}

.sonar circle:nth-child(3) {
  animation-delay: 5s;
}

@keyframes ping {
  0% {
    transform: scale(0.02);
    opacity: 0.55;
  }
  100% {
    transform: scale(1);
    opacity: 0;
  }
}

/* something at the bottom of the trench, looking up */
.eye-halo {
  fill: rgba(255, 77, 77, 0.12);
  animation: eye 5.5s ease-in-out infinite;
}

.eye {
  fill: var(--signal);
  filter: drop-shadow(0 0 6px var(--signal)) drop-shadow(0 0 18px rgba(255, 77, 77, 0.6));
  animation: eye 5.5s ease-in-out infinite;
}

@keyframes eye {
  0%,
  100% {
    opacity: 0.35;
  }
  45%,
  55% {
    opacity: 1;
  }
}

/* marine snow: two layers of specks drifting slowly down */
.snow,
.snow::after {
  position: absolute;
  inset: -40% 0 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    radial-gradient(1px 1px at 12% 18%, rgba(220, 240, 240, 0.5), transparent 60%),
    radial-gradient(1px 1px at 38% 62%, rgba(220, 240, 240, 0.35), transparent 60%),
    radial-gradient(1.5px 1.5px at 71% 33%, rgba(220, 240, 240, 0.4), transparent 60%),
    radial-gradient(1px 1px at 86% 78%, rgba(220, 240, 240, 0.3), transparent 60%),
    radial-gradient(1px 1px at 55% 8%, rgba(220, 240, 240, 0.3), transparent 60%);
  background-size: 340px 300px;
  animation: snow 38s linear infinite;
}

.snow::after {
  content: "";
  inset: 0;
  background-size: 520px 460px;
  opacity: 0.6;
  animation-duration: 64s;
  animation-direction: normal;
}

@keyframes snow {
  to {
    transform: translate3d(-40px, 300px, 0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .sonar circle,
  .eye,
  .eye-halo,
  .snow,
  .snow::after {
    animation: none;
  }
  .sonar circle {
    opacity: 0;
  }
  .eye {
    opacity: 0.8;
  }
  html {
    scroll-behavior: auto;
  }
}

.hero-inner {
  max-width: var(--max);
  margin: 0 auto;
}

.hero h1 {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.hero-ja {
  font: 800 clamp(4.5rem, 18vw, 11rem) / 0.95 var(--serif);
  letter-spacing: 0.04em;
  color: var(--ink);
  text-shadow: 0 0 1px rgba(221, 229, 230, 0.4), 0 0 80px rgba(111, 224, 208, 0.12);
}

.hero-en {
  font: 500 clamp(0.78rem, 2vw, 0.95rem) / 1 var(--mono);
  letter-spacing: 0.46em;
  text-transform: uppercase;
  color: var(--glow);
  padding-left: 0.2em;
}

.hero-tag {
  margin: 32px 0 8px;
  font: 600 clamp(1.25rem, 3.4vw, 1.75rem) / 1.35 var(--serif);
}

.hero-desc {
  margin: 0;
  max-width: 56ch;
  color: var(--muted);
}

/* ---- release grid */
.releases,
.release {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.releases > .kicker {
  margin: 72px 0 6px;
}

.releases h2 {
  margin: 0 0 28px;
  font: 600 1.6rem/1.2 var(--serif);
}

.grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(16px, 3vw, 28px);
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 240px), 1fr));
}

.card a {
  display: block;
  height: 100%;
  text-decoration: none;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.card img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  filter: saturate(0.55) brightness(0.72) contrast(1.05);
  transition: filter 0.5s ease;
}

.card a:hover,
.card a:focus-visible {
  color: inherit;
  border-color: var(--line-2);
  box-shadow: 0 0 0 1px rgba(111, 224, 208, 0.08), 0 24px 60px -30px rgba(111, 224, 208, 0.35);
}

.card a:hover img,
.card a:focus-visible img {
  filter: none;
}

.card-text {
  padding: 14px 16px 18px;
  border-top: 1px solid var(--line);
}

.card h3 {
  margin: 6px 0 0;
  font: 600 1.15rem/1.3 var(--serif);
}

.card-type {
  margin: 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.cat {
  color: var(--glow);
  letter-spacing: 0.1em;
}

.card-ja {
  margin: 2px 0 0;
  font-size: 0.85rem;
  color: var(--faint);
}

.badge {
  padding: 1px 7px;
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  border: 1px solid var(--line-2);
}

.badge-out {
  color: var(--signal);
  border-color: rgba(255, 77, 77, 0.55);
  box-shadow: 0 0 12px -4px rgba(255, 77, 77, 0.6);
}

.badge-soon {
  color: var(--muted);
}

/* ---- release page */
.release-head {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
  padding-top: clamp(32px, 5vw, 64px);
  grid-template-columns: minmax(0, 1fr);
}

@media (min-width: 820px) {
  .release-head {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: start;
  }
}

/* cover in a sighting frame: corner ticks outside the image */
.cover-frame {
  position: relative;
  padding: 10px;
}

.cover-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border: 1px solid var(--glow);
  opacity: 0.55;
  -webkit-mask:
    linear-gradient(#000 0 0) top left / 18px 18px no-repeat,
    linear-gradient(#000 0 0) top right / 18px 18px no-repeat,
    linear-gradient(#000 0 0) bottom left / 18px 18px no-repeat,
    linear-gradient(#000 0 0) bottom right / 18px 18px no-repeat;
  mask:
    linear-gradient(#000 0 0) top left / 18px 18px no-repeat,
    linear-gradient(#000 0 0) top right / 18px 18px no-repeat,
    linear-gradient(#000 0 0) bottom left / 18px 18px no-repeat,
    linear-gradient(#000 0 0) bottom right / 18px 18px no-repeat;
}

.cover {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 2px;
  box-shadow: 0 40px 90px -40px rgba(0, 0, 0, 0.9), 0 0 0 1px rgba(0, 0, 0, 0.5);
}

.release h1 {
  margin: 12px 0 0;
  font: 800 clamp(2.2rem, 6vw, 3.6rem) / 1.08 var(--serif);
  overflow-wrap: anywhere;
}

.release-ja {
  margin: 6px 0 0;
  font-size: 1.05rem;
  color: var(--muted);
}

.artist {
  margin: 16px 0 0;
  font: 500 0.8rem/1.2 var(--mono);
  letter-spacing: 0.2em;
  color: var(--glow);
}

.tagline {
  margin: 14px 0 0;
  font-size: 1.1rem;
  max-width: 48ch;
}

.links {
  list-style: none;
  padding: 0;
  margin: 26px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.links a {
  display: inline-block;
  padding: 8px 16px;
  border: 1px solid var(--line-2);
  text-decoration: none;
  font: 500 0.8rem/1.2 var(--mono);
  letter-spacing: 0.06em;
}

.links a:hover {
  background: var(--glow-soft);
  border-color: var(--glow);
}

.links-soon {
  margin: 26px 0 0;
  color: var(--faint);
  font-size: 0.9rem;
}

.facts {
  margin: 28px 0 0;
  display: grid;
  border-top: 1px solid var(--line);
}

.facts div {
  display: grid;
  grid-template-columns: minmax(96px, 1fr) 2fr;
  gap: 16px;
  padding: 10px 2px;
  border-bottom: 1px solid var(--line);
}

.facts dt {
  color: var(--faint);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding-top: 0.2em;
}

.facts dd {
  margin: 0;
}

.release section h2 {
  margin: 0 0 16px;
  font: 600 1.4rem/1.2 var(--serif);
}

.video {
  margin-top: 56px;
}

.yt,
.video iframe {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.yt {
  position: relative;
  padding: 0;
  cursor: pointer;
  background: #000;
}

.yt img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.7;
  filter: saturate(0.7);
}

.yt-play {
  position: absolute;
  inset: 0;
  margin: auto;
  width: 76px;
  height: 76px;
  border-radius: 50%;
  border: 1px solid var(--glow);
  background: rgba(4, 7, 10, 0.6);
  box-shadow: 0 0 40px rgba(111, 224, 208, 0.3);
}

.yt-play::after {
  content: "";
  position: absolute;
  left: 30px;
  top: 24px;
  border-style: solid;
  border-width: 14px 0 14px 22px;
  border-color: transparent transparent transparent var(--glow);
}

.yt:hover .yt-play {
  background: rgba(111, 224, 208, 0.15);
}

.teaser {
  margin-top: 64px;
}

.teaser .kicker {
  margin-bottom: 6px;
}

/* any shape: at most the column wide and 80% of the screen tall, keeping its ratio (a 9:16 clip stays phone-sized) */
.teaser video {
  display: block;
  width: auto;
  height: auto;
  max-width: min(100%, 640px);
  max-height: 80vh;
  background: #000;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 40px 90px -40px rgba(0, 0, 0, 0.9);
}

.about {
  margin-top: 56px;
  max-width: 68ch;
  font-size: 1.05rem;
  color: var(--muted);
}

.tracks {
  margin-top: 56px;
}

.tracks ol {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.tracks li {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: 2px 12px;
  padding: 14px 4px;
  border-bottom: 1px solid var(--line);
}

@media (min-width: 640px) {
  .tracks li {
    grid-template-columns: 3rem 1fr auto;
  }
}

.t-no {
  color: var(--glow);
  font-size: 0.85rem;
  padding-top: 0.15em;
  font-variant-numeric: tabular-nums;
}

.t-title {
  font-weight: 700;
}

.t-note {
  grid-column: 2;
  color: var(--faint);
  font-size: 0.9rem;
}

@media (min-width: 640px) {
  .t-note {
    grid-column: auto;
  }
}

/* ---- lyrics */
.lyrics {
  margin-top: 72px;
}

.lyrics-head {
  position: sticky;
  top: 58px;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 12px 0;
  margin-bottom: 8px;
  background: linear-gradient(180deg, var(--bg) 70%, transparent);
}

.lyrics-head h2 {
  margin: 0 !important;
}

.toggles {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.toggles[hidden] {
  display: none;
}

.toggles button {
  font: 400 0.75rem/1.2 var(--mono);
  letter-spacing: 0.06em;
  padding: 6px 12px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--faint);
  cursor: pointer;
}

.toggles button[lang="ja"] {
  font-family: var(--sans);
  font-size: 0.8rem;
}

.toggles button[aria-pressed="true"] {
  color: var(--ink);
  border-color: rgba(111, 224, 208, 0.5);
  background: var(--glow-soft);
}

.verse {
  margin: 32px 0 0;
  padding-left: 18px;
  border-left: 1px solid var(--line);
}

.verse h3 {
  margin: 0 0 12px;
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--faint);
  font-weight: 400;
}

.line {
  margin: 0 0 14px;
  display: flex;
  flex-direction: column;
}

.l-ja {
  font-size: 1.12rem;
  font-weight: 500;
}

.l-ro {
  font-size: 0.86rem;
  color: var(--glow);
  opacity: 0.8;
  font-style: italic;
}

.l-en {
  font-size: 0.95rem;
  color: var(--muted);
}

.hide-ja .l-ja,
.hide-ro .l-ro,
.hide-en .l-en {
  display: none;
}

.credits {
  margin-top: 64px;
}

.next {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  text-align: right;
}

.next a {
  font: 600 1.1rem/1.3 var(--serif);
  text-decoration: none;
}

/* ---- 404 */
.lost {
  max-width: var(--max);
  margin: 0 auto;
  padding: 140px var(--gutter) 40px;
  text-align: center;
}

.lost-ja {
  margin: 0;
  font: 800 clamp(3rem, 12vw, 6rem) / 1 var(--serif);
  color: var(--ink);
  text-shadow: 0 0 40px rgba(255, 77, 77, 0.25);
}

.lost h1 {
  font: 500 1rem/1.2 var(--mono);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--signal);
}

.lost p:last-child {
  color: var(--muted);
}