:root {
  /* Typography compliance: Space Grotesk** Groteskk from Google Fonts as the main sans-grotesk voice for large titles and letters; IBM Plex Mono** Monoo sparingly for terminal readouts. */
  --black: #16151A;
  --teal: #2F6F73;
  --coral: #D7836F;
  --cream: #E2D6B8;
  --olive: #6F7750;
  --blue: #1B3142;
  --magenta: #9F4E72;
  --silver: #B7B8A6;
  --title: "Space Grotesk", "Inter", "Arial Narrow", system-ui, sans-serif;
  --body: "Archivo", "Inter", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--cream);
  background:
    radial-gradient(circle at 12% 6%, rgba(47, 111, 115, .32), transparent 28rem),
    radial-gradient(circle at 90% 22%, rgba(159, 78, 114, .22), transparent 24rem),
    linear-gradient(135deg, var(--black), #11151a 42%, var(--blue));
  font-family: var(--body);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(215,131,111,.05) 1px, transparent 1px),
    linear-gradient(0deg, rgba(183,184,166,.04) 1px, transparent 1px);
  background-size: 7.25vw 100%, 100% 4.5rem;
  mix-blend-mode: screen;
  opacity: .42;
  z-index: 4;
}

.crt-noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 20;
  opacity: .28;
  background:
    repeating-linear-gradient(0deg, rgba(226,214,184,.055) 0 1px, transparent 1px 4px),
    repeating-linear-gradient(90deg, transparent 0 22px, rgba(47,111,115,.045) 22px 23px),
    radial-gradient(circle at 50% 50%, transparent, rgba(22,21,26,.46));
}

.aquarium-wall {
  min-height: 100vh;
  position: relative;
}

.chapter {
  min-height: 100vh;
  padding: clamp(1rem, 2vw, 2rem);
  position: relative;
  display: grid;
  align-content: center;
}

.chapter::after {
  content: attr(data-chapter);
  position: absolute;
  right: 1rem;
  bottom: .75rem;
  color: rgba(183, 184, 166, .2);
  font: 700 clamp(2.6rem, 10vw, 9rem)/.8 var(--title);
  text-transform: uppercase;
  pointer-events: none;
}

.mono, .specimen, .project-id { font-family: var(--mono); letter-spacing: .08em; text-transform: uppercase; }

.tank-grid, .portfolio-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: minmax(4.5rem, 9vw);
  gap: clamp(.45rem, .8vw, .9rem);
}

.tank {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(183, 184, 166, .38);
  background:
    linear-gradient(135deg, rgba(226,214,184,.08), transparent 34%),
    radial-gradient(circle at var(--mx, 50%) var(--my, 50%), rgba(215,131,111,.18), transparent 13rem),
    linear-gradient(180deg, rgba(47,111,115,.28), rgba(27,49,66,.74) 48%, rgba(22,21,26,.92));
  box-shadow:
    inset .45rem .45rem 1.8rem rgba(226, 214, 184, .08),
    inset -.6rem -.8rem 1.4rem rgba(22, 21, 26, .8),
    0 .8rem 2.2rem rgba(0,0,0,.34);
  transition: transform .42s cubic-bezier(.2,.8,.2,1), filter .42s, border-color .42s;
}

.tank::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(105deg, transparent 0 38%, rgba(226,214,184,.18) 42%, transparent 48% 100%),
    repeating-linear-gradient(0deg, rgba(226,214,184,.035) 0 1px, transparent 1px 5px);
  mix-blend-mode: screen;
  pointer-events: none;
  opacity: .72;
}

.tank::after {
  content: "";
  position: absolute;
  inset: .45rem;
  border: 1px solid rgba(47, 111, 115, .55);
  transform: translate(.18rem, -.14rem);
  pointer-events: none;
}

.tank:hover, .tank.is-active {
  border-color: var(--coral);
  filter: saturate(1.15) contrast(1.08);
  transform: translateY(-.18rem) skewX(-.35deg);
}

.tank.is-shaking { animation: shake-error .46s steps(7, end); }
.tank[data-mood="flicker"] { animation: dying-screen 6.5s infinite steps(1, end); }
.tank[data-mood="warp"] .letter, .tank[data-mood="warp"] h3 { animation: water-warp 4.6s ease-in-out infinite; }

.hero-grid { min-height: calc(100vh - 4rem); }
.l-one { grid-column: 1 / 4; grid-row: 1 / 5; }
.l-two { grid-column: 4 / 7; grid-row: 1 / 3; }
.intro-copy { grid-column: 7 / 11; grid-row: 1 / 4; padding: 1.35rem; }
.i-one { grid-column: 11 / 13; grid-row: 1 / 6; }
.t-one { grid-column: 1 / 5; grid-row: 5 / 8; }
.t-two { grid-column: 5 / 9; grid-row: 3 / 8; }
.l-three { grid-column: 9 / 13; grid-row: 6 / 8; }

.letter {
  position: absolute;
  inset: auto .5rem -.9rem .55rem;
  margin: 0;
  font: 800 clamp(8rem, 21vw, 21rem)/.72 var(--title);
  color: var(--cream);
  letter-spacing: -.12em;
  text-shadow: -4px 0 var(--magenta), 4px 0 rgba(47,111,115,.9), 0 0 2rem rgba(215,131,111,.28);
  transform: translate(var(--gx, 0), var(--gy, 0));
}

.glitch-letter.loaded { animation: letter-settle 1s cubic-bezier(.2,.8,.1,1) both; }
.glitch-letter::before, .glitch-letter::after {
  content: attr(class);
  display: none;
}

.chapter-tag {
  display: inline-flex;
  width: max-content;
  color: var(--silver);
  background: rgba(22,21,26,.72);
  border: 1px solid rgba(183,184,166,.34);
  padding: .45rem .65rem;
  margin-bottom: .9rem;
}

.specimen, .project-id {
  position: relative;
  z-index: 2;
  display: inline-block;
  margin: .8rem;
  color: var(--silver);
  font-size: .68rem;
}

.cream-label, .sticker {
  position: relative;
  z-index: 3;
  display: inline-block;
  max-width: 18rem;
  color: var(--black);
  background: var(--cream);
  padding: .45rem .62rem;
  font-weight: 700;
  box-shadow: .18rem .18rem 0 rgba(159,78,114,.7);
  transform: rotate(-1.3deg);
}

.terminal-note {
  position: absolute;
  right: .8rem;
  bottom: .8rem;
  z-index: 3;
  max-width: 11rem;
  color: var(--coral);
  font-size: .66rem;
}

.intro-copy p, .chapter-header p, .project p, .hatch p, .reef-board p, .final-tank p {
  position: relative;
  z-index: 2;
  max-width: 42rem;
  color: rgba(226,214,184,.86);
  font-size: clamp(1rem, 1.35vw, 1.22rem);
  line-height: 1.42;
}

.intro-copy p { margin-top: 2rem; }

.fish, .project-fish, .spine-fish {
  position: absolute;
  z-index: 1;
  display: block;
  width: 5.5rem;
  height: 2rem;
  left: var(--fish-x, 18%);
  top: var(--fish-y, 54%);
  background: linear-gradient(90deg, transparent 0 11%, var(--coral) 12% 36%, var(--cream) 37% 50%, var(--magenta) 51% 72%, transparent 73%);
  clip-path: polygon(0 50%, 18% 16%, 70% 24%, 100% 0, 85% 50%, 100% 100%, 70% 76%, 18% 84%);
  opacity: .8;
  filter: drop-shadow(4px 0 0 rgba(47,111,115,.65)) blur(.2px);
  animation: fish-dart 8s ease-in-out infinite;
}
.fish-b { --fish-y: 35%; animation-delay: -2s; width: 4rem; }
.fish-c { --fish-y: 72%; animation-delay: -3.5s; background: var(--silver); }
.fish-d { --fish-y: 42%; animation-delay: -5s; width: 7rem; height: 2.8rem; }
.fish-e { --fish-y: 60%; animation-delay: -1s; background: linear-gradient(90deg, var(--coral) 0 20%, var(--cream) 21% 35%, var(--black) 36% 41%, var(--coral) 42% 70%, transparent 71%); }
.fish-f, .spine-fish { clip-path: polygon(0 50%, 16% 10%, 45% 34%, 58% 0, 68% 36%, 100% 20%, 78% 52%, 100% 85%, 62% 70%, 51% 100%, 41% 68%, 15% 90%); }

.waterline {
  position: absolute;
  left: 0;
  right: 0;
  top: 34%;
  height: 2px;
  background: repeating-linear-gradient(90deg, var(--silver) 0 .5rem, transparent .5rem 1.2rem);
  opacity: .7;
  animation: waterline 3.4s ease-in-out infinite;
}

.chapter-header { max-width: 56rem; margin-bottom: 1.2rem; }
.chapter-header.offset { margin-left: 16vw; }
.chapter-header h2, .reef-board h2, .final-tank h2 {
  margin: 0;
  color: var(--cream);
  font: 800 clamp(2.4rem, 7vw, 7rem)/.9 var(--title);
  letter-spacing: -.07em;
  text-transform: lowercase;
}

.log-grid { grid-auto-rows: minmax(5rem, 8vw); }
.log-panel { grid-column: 1 / 8; grid-row: 1 / 4; padding: 1rem; }
.hatch { grid-column: 8 / 11; grid-row: 1 / 3; padding: 1rem; background-color: rgba(111,119,80,.2); }
.mini-readout { grid-column: 11 / 13; grid-row: 1 / 4; padding: 1rem; }
.label-strip { grid-column: 4 / 11; grid-row: 4 / 5; padding: .9rem 1rem; background-color: rgba(159,78,114,.15); }
.large-note { font: 700 clamp(1.6rem, 3.4vw, 4rem)/1 var(--title); color: var(--cream); max-width: 38rem; }
.note-button {
  position: relative;
  z-index: 4;
  border: 1px solid var(--coral);
  background: rgba(215,131,111,.14);
  color: var(--cream);
  padding: .7rem 1rem;
  font: 700 .78rem var(--mono);
  text-transform: uppercase;
  cursor: pointer;
}

.screw { position: absolute; width: .55rem; height: .55rem; border-radius: 50%; background: var(--silver); box-shadow: inset 0 0 0 2px var(--black); }
.s1 { left: .6rem; top: .6rem; }.s2 { right: .6rem; bottom: .6rem; }
.thermo { display: block; height: 12rem; width: .6rem; border: 1px solid var(--silver); margin: 1rem 0; padding: 2px; }
.thermo i { display: block; height: 68%; margin-top: 3.3rem; background: var(--coral); }

.portfolio-grid { grid-auto-rows: minmax(5.5rem, 7vw); }
.project { padding: 1rem; }
.project h3 { position: relative; z-index: 2; margin: 1rem .8rem .4rem; font: 800 clamp(1.45rem, 2.5vw, 3.6rem)/.92 var(--title); color: var(--cream); letter-spacing: -.05em; }
.project p { margin: .4rem .8rem; font-size: 1rem; }
.panoramic { grid-column: 1 / 8; grid-row: 1 / 4; }
.cassette { grid-column: 8 / 13; grid-row: 1 / 2; }
.tall { grid-column: 8 / 11; grid-row: 2 / 6; }
.square { grid-column: 1 / 4; grid-row: 4 / 6; }
.wide-low { grid-column: 4 / 8; grid-row: 4 / 6; }

.reef-chapter { grid-template-columns: minmax(0, 1fr) minmax(16rem, 28rem); gap: 1rem; align-items: center; }
.reef-board { min-height: 70vh; padding: clamp(1rem, 3vw, 3rem); }
.ripple-bars { position: relative; z-index: 2; display: flex; gap: .38rem; margin: 2rem 0; }
.ripple-bars i { display: block; width: clamp(1rem, 4vw, 4rem); height: 8rem; background: repeating-linear-gradient(0deg, var(--teal) 0 .4rem, transparent .4rem .9rem); opacity: .8; transform: skewX(-8deg); }
.ripple-bars i:nth-child(even) { background: repeating-linear-gradient(0deg, var(--magenta) 0 .22rem, transparent .22rem .8rem); transform: translateY(1rem) skewX(8deg); }
.archive-notes { display: grid; gap: .65rem; align-content: center; }
.archive-notes span { border: 1px solid rgba(183,184,166,.38); background: rgba(226,214,184,.08); padding: .8rem; color: var(--silver); font-family: var(--mono); text-transform: uppercase; font-size: .75rem; }

.final-tank { min-height: 78vh; padding: clamp(1rem, 3vw, 3rem); display: grid; align-content: center; }
.final-tank h2 { max-width: 68rem; }
.final-label { width: max-content; margin-top: 1.5rem; }
.school i { position: absolute; width: 4rem; height: 1.4rem; background: var(--silver); clip-path: polygon(0 50%, 18% 20%, 72% 32%, 100% 4%, 86% 50%, 100% 96%, 72% 68%, 18% 80%); opacity: .42; animation: school-swim 11s linear infinite; }
.school i:nth-child(1){ top:18%; animation-delay:-1s; }.school i:nth-child(2){ top:32%; animation-delay:-4s; transform:scale(.7); }.school i:nth-child(3){ top:56%; animation-delay:-7s; }.school i:nth-child(4){ top:69%; animation-delay:-9s; transform:scale(1.2); }.school i:nth-child(5){ top:82%; animation-delay:-2.5s; transform:scale(.55); }

.side-nav {
  position: fixed;
  z-index: 30;
  right: .75rem;
  top: 50%;
  transform: translateY(-50%);
  display: grid;
  gap: .35rem;
}
.side-nav a { color: var(--silver); text-decoration: none; border: 1px solid rgba(183,184,166,.28); background: rgba(22,21,26,.72); padding: .38rem .5rem; font-size: .62rem; }
.side-nav a.active { color: var(--black); background: var(--coral); }

.cursor-fish {
  position: fixed;
  z-index: 25;
  width: 3rem;
  height: 1.2rem;
  left: 0;
  top: 0;
  pointer-events: none;
  background: var(--coral);
  clip-path: polygon(0 50%, 18% 20%, 70% 30%, 100% 0, 85% 50%, 100% 100%, 70% 70%, 18% 80%);
  opacity: .72;
  filter: drop-shadow(3px 0 0 var(--teal));
  transform: translate(-100px, -100px);
}

@keyframes shake-error {
  0%,100% { transform: translate(0,0) skewX(0); }
  14% { transform: translate(-7px, 2px) skewX(-1deg); }
  28% { transform: translate(6px, -2px) skewX(1deg); }
  42% { transform: translate(-4px, 1px) skewX(-.6deg); }
  56% { transform: translate(5px, 0) skewX(.8deg); }
  70% { transform: translate(-2px, -1px) skewX(-.3deg); }
}

@keyframes dying-screen { 0%, 92%, 100% { opacity: 1; } 93% { opacity: .55; } 94% { opacity: .92; } 96% { opacity: .7; } }
@keyframes water-warp { 0%,100% { transform: translateX(0) skewX(0); } 50% { transform: translateX(.28rem) skewX(-2deg); } }
@keyframes fish-dart { 0% { transform: translateX(-30%) scaleX(1); } 45% { transform: translateX(180%) scaleX(1); } 50% { transform: translateX(180%) scaleX(-1); } 95% { transform: translateX(-30%) scaleX(-1); } 100% { transform: translateX(-30%) scaleX(1); } }
@keyframes waterline { 0%,100% { transform: translateY(0); } 50% { transform: translateY(.5rem); } }
@keyframes letter-settle { 0% { transform: translate(var(--start-x), var(--start-y)) skewX(8deg); filter: blur(3px); } 30% { transform: translate(calc(var(--start-x) * -.22), calc(var(--start-y) * .18)) skewX(-5deg); } 100% { transform: translate(var(--gx,0), var(--gy,0)) skewX(0); filter: blur(0); } }
@keyframes school-swim { from { left: -7rem; } to { left: calc(100% + 7rem); } }

@media (max-width: 820px) {
  .chapter { min-height: auto; padding: 1rem; }
  .tank-grid, .portfolio-grid { grid-template-columns: repeat(6, 1fr); grid-auto-rows: minmax(7rem, auto); }
  .hero-grid { min-height: auto; }
  .l-one, .l-two, .intro-copy, .i-one, .t-one, .t-two, .l-three, .log-panel, .hatch, .mini-readout, .label-strip, .panoramic, .cassette, .tall, .square, .wide-low { grid-column: 1 / -1; grid-row: auto; min-height: 12rem; }
  .letter { font-size: 10rem; }
  .reef-chapter { grid-template-columns: 1fr; }
  .side-nav { display: none; }
}