:root {
  --ink: #07202a;
  --deep: #061a24;
  --water: #0799b6;
  --water-2: #39d7de;
  --teal: #0ec7a4;
  --sand: #f4d27b;
  --gold: #ffd34e;
  --coral: #ff705e;
  --grass: #55c66b;
  --stone: #91a5aa;
  --white: #f5fff8;
  --muted: #b7d4d5;
  --shadow: #031015;
  --panel: rgba(7, 32, 42, 0.86);
  --panel-2: rgba(4, 22, 32, 0.94);
  --pixel: 4px;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 20% 10%, rgba(14,199,164,.26), transparent 22rem),
    radial-gradient(circle at 80% 25%, rgba(57,215,222,.18), transparent 24rem),
    linear-gradient(180deg, #04141e 0%, #062334 48%, #04121a 100%);
  color: var(--white);
  font-family: "Courier New", Courier, monospace;
  line-height: 1.55;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: .12;
  background-image:
    linear-gradient(rgba(255,255,255,.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.08) 1px, transparent 1px);
  background-size: 32px 32px;
  mix-blend-mode: screen;
}

body.notes-on .presenter-note { display: block; }
body.presentation-mode .section { min-height: 100vh; }

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }

.pixel-border {
  border: var(--pixel) solid #b8fff2;
  box-shadow: 8px 8px 0 var(--shadow), inset 0 0 0 4px rgba(255,255,255,.06);
}

.loader {
  position: fixed;
  inset: 0;
  z-index: 999;
  display: grid;
  place-items: center;
  background: #031118;
  transition: opacity .6s ease, visibility .6s ease;
}
.loader.loaded { opacity: 0; visibility: hidden; }
.loader-box {
  width: min(92vw, 520px);
  padding: 2rem;
  text-align: center;
  background: linear-gradient(180deg, #082d3c, #061a24);
}
.loader h1 { font-size: clamp(1.4rem, 4vw, 2.3rem); margin: .5rem 0 1rem; text-transform: uppercase; }
.loader p { color: var(--muted); margin-bottom: 0; }
.loader-track {
  height: 24px;
  background: #021017;
  border: 4px solid #b8fff2;
  box-shadow: 4px 4px 0 var(--shadow);
  overflow: hidden;
}
.loader-track span {
  display: block;
  height: 100%;
  width: 100%;
  background: repeating-linear-gradient(90deg, var(--gold) 0 22px, #ffef9b 22px 26px);
  animation: loadingBlocks 1.5s ease-in-out both;
}
.tiny-shark {
  width: 86px; height: 34px; margin: 0 auto 1rem;
  background: #9bb5b7;
  clip-path: polygon(0 52%, 22% 15%, 66% 22%, 87% 2%, 82% 43%, 100% 50%, 82% 59%, 88% 97%, 66% 78%, 22% 86%);
  filter: drop-shadow(4px 4px 0 #020b10);
  animation: bob 1.2s ease-in-out infinite alternate;
}
@keyframes loadingBlocks { from { width: 0; } to { width: 100%; } }

.site-progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 6px;
  z-index: 80;
  background: rgba(255,255,255,.08);
}
.site-progress span { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--gold), var(--teal), var(--water-2)); }

.site-header {
  position: fixed;
  z-index: 70;
  left: 1rem; right: 1rem; top: 1rem;
  height: auto;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: .7rem .85rem;
  background: rgba(3, 17, 24, .82);
  backdrop-filter: blur(14px);
}
.brand { display: flex; align-items: center; gap: .65rem; font-weight: 900; text-transform: uppercase; letter-spacing: .04em; white-space: nowrap; }
.brand-cube {
  width: 30px; height: 30px;
  background: linear-gradient(135deg, #25d7ff 0 50%, #0b7588 50%);
  border: 3px solid #b8fff2;
  box-shadow: 4px 4px 0 var(--shadow);
}
.top-nav { display: flex; gap: .45rem; overflow: auto; padding-bottom: .1rem; flex: 1; justify-content: flex-end; }
.top-nav a, .mini-btn {
  border: 3px solid rgba(184,255,242,.75);
  background: rgba(12, 53, 67, .88);
  color: var(--white);
  padding: .45rem .62rem;
  font-weight: 800;
  font-size: .82rem;
  text-transform: uppercase;
  box-shadow: 3px 3px 0 var(--shadow);
  cursor: pointer;
}
.top-nav a.active, .top-nav a:hover, .mini-btn:hover, .mini-btn[aria-pressed="true"] { background: var(--gold); color: var(--ink); }

.section {
  position: relative;
  min-height: 100vh;
  padding: 7.5rem 5vw 5rem;
  z-index: 1;
  overflow: hidden;
}
.section-inner { width: min(100%, var(--max)); margin: 0 auto; position: relative; z-index: 2; }
.section-inner.narrow { width: min(100%, 900px); }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }
.reverse .two-col { direction: rtl; }
.reverse .two-col > * { direction: ltr; }
.section-heading { text-align: center; margin-bottom: 2rem; }
.section-heading h2, .info-panel h2, .quote h2, .quiz h2 { margin-top: 0; }
.eyebrow { color: var(--gold); font-weight: 900; text-transform: uppercase; letter-spacing: .15em; margin: 0 0 .55rem; }
h1, h2, h3 { line-height: 1.05; text-transform: uppercase; letter-spacing: .02em; }
h1 { font-size: clamp(3rem, 9vw, 7rem); margin: 0; text-shadow: 8px 8px 0 var(--shadow); }
h1 span, h2 span { color: var(--gold); }
h2 { font-size: clamp(2.1rem, 5vw, 4.1rem); text-shadow: 5px 5px 0 var(--shadow); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.7rem); }
p { font-size: clamp(1rem, 2.2vw, 1.17rem); }

.hero {
  display: grid;
  align-items: center;
  padding-top: 8rem;
}
.hero-bg, .hero-overlay { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero-bg { filter: saturate(1.1) contrast(1.05) brightness(.72); }
.hero-overlay {
  background:
    linear-gradient(90deg, rgba(3,17,24,.95), rgba(3,17,24,.38) 58%, rgba(3,17,24,.75)),
    repeating-linear-gradient(0deg, rgba(255,255,255,.05) 0 8px, transparent 8px 16px);
}
.hero-content { width: min(100%, 960px); position: relative; z-index: 3; }
.hero-copy { max-width: 720px; font-size: clamp(1.2rem, 2.6vw, 1.6rem); color: #defefb; }
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; margin: 2rem 0; }
.pixel-btn {
  border: 4px solid #b8fff2;
  background: var(--gold);
  color: var(--ink);
  padding: .9rem 1.05rem;
  font-weight: 900;
  text-transform: uppercase;
  box-shadow: 7px 7px 0 var(--shadow);
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .2s ease;
}
.pixel-btn:hover { transform: translate(-3px,-3px); box-shadow: 10px 10px 0 var(--shadow); }
.pixel-btn:active { transform: translate(3px,3px); box-shadow: 4px 4px 0 var(--shadow); }
.pixel-btn.ghost { background: rgba(8, 47, 60, .78); color: var(--white); }
.stat-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; max-width: 780px; }
.stat-card {
  background: rgba(5, 28, 38, .84);
  border: 4px solid rgba(184,255,242,.85);
  box-shadow: 6px 6px 0 var(--shadow);
  padding: .9rem;
}
.stat-card strong { display: block; color: var(--gold); text-transform: uppercase; }
.stat-card span { font-weight: 900; }
.shark-sprite {
  position: absolute;
  z-index: 2;
  width: min(44vw, 420px);
  top: 54%;
  left: auto;
  right: -460px;
  filter: drop-shadow(10px 10px 0 rgba(0,0,0,.35));
  opacity: .92;
  animation: swimAcross 22s linear infinite;
}
@keyframes swimAcross {
  0% { transform: translateX(0) translateY(0) scale(.8); }
  45% { transform: translateX(-88vw) translateY(-30px) scale(.95); }
  100% { transform: translateX(-160vw) translateY(20px) scale(.8); }
}
.bubble-layer { position: absolute; inset: 0; pointer-events: none; overflow: hidden; z-index: 2; }
.bubble { position: absolute; bottom: -40px; width: var(--size); height: var(--size); border: 3px solid rgba(222,255,251,.65); background: rgba(255,255,255,.12); animation: bubbleUp var(--speed) linear infinite; left: var(--left); }
@keyframes bubbleUp { to { transform: translateY(-110vh) translateX(var(--drift)); opacity: 0; } }

.mission-map { background: linear-gradient(180deg, rgba(4,18,26,.7), rgba(6,44,55,.4)); }
.map-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1rem; margin-top: 2rem; }
.map-block {
  min-height: 145px;
  display: grid;
  place-items: center;
  text-align: center;
  color: var(--ink);
  font-weight: 900;
  text-transform: uppercase;
  border: 4px solid #effffb;
  box-shadow: 8px 8px 0 var(--shadow);
  position: relative;
  overflow: hidden;
  transition: transform .18s ease, box-shadow .18s ease;
}
.map-block::after {
  content:""; position:absolute; inset:0; opacity:.3;
  background-image: linear-gradient(rgba(255,255,255,.4) 2px, transparent 2px), linear-gradient(90deg, rgba(255,255,255,.4) 2px, transparent 2px);
  background-size: 18px 18px;
}
.map-block:hover { transform: translate(-5px,-5px) rotate(-1deg); box-shadow: 13px 13px 0 var(--shadow); }
.map-block span { position: relative; z-index: 2; background: rgba(255,255,255,.8); padding: .2rem .45rem; border: 3px solid var(--ink); }
.map-block strong { position: relative; z-index: 2; font-size: 1.35rem; }
.map-block.grass { background: var(--grass); }
.map-block.water { background: var(--water-2); }
.map-block.stone { background: var(--stone); }
.map-block.sand { background: var(--sand); }
.map-block.coral { background: var(--coral); }
.map-block.gold { background: var(--gold); }
.map-block.book { background: #c796ff; }

.info-panel, .adapt-panel, .chain-board, .quiz-card, .quote-box, .closing-card {
  background: var(--panel);
  padding: clamp(1.25rem, 3vw, 2rem);
}
.big-answer { font-size: clamp(1.25rem, 2.5vw, 1.65rem); }
.check-list { list-style: none; padding: 0; margin: 1rem 0; }
.check-list li { margin: .75rem 0; padding-left: 2rem; position: relative; }
.check-list li::before { content: "▣"; position: absolute; left: 0; color: var(--gold); }
.check-list.warning li::before { color: var(--coral); }
.science-words, .student-line {
  margin-top: 1rem;
  padding: .85rem;
  background: rgba(255,255,255,.08);
  border-left: 6px solid var(--gold);
}
.student-line { border-left-color: var(--teal); color: #eafffd; }
.presenter-note {
  display: none;
  margin-top: 1rem;
  padding: 1rem;
  background: rgba(255, 211, 78, .14);
  border: 3px dashed var(--gold);
  color: #fff9d5;
}
.full-note { width: min(100%, 900px); margin: 2rem auto 0; }
.image-card {
  position: relative;
  border: 4px solid #b8fff2;
  box-shadow: 8px 8px 0 var(--shadow);
  overflow: hidden;
  background: #04121a;
}
.image-card img { aspect-ratio: 16/9; object-fit: cover; width: 100%; filter: saturate(1.08) contrast(1.05); }
.image-label {
  position: absolute; left: 1rem; bottom: 1rem;
  background: var(--gold); color: var(--ink); font-weight: 900;
  padding: .65rem .8rem;
  border: 3px solid var(--ink);
  box-shadow: 4px 4px 0 var(--shadow);
}
.habitat-stack { display: grid; grid-template-columns: repeat(3, 1fr); gap: .75rem; margin: 1.5rem 0; }
.habitat-block {
  min-height: 90px;
  display: grid;
  place-items: center;
  color: var(--ink);
  font-weight: 900;
  text-transform: uppercase;
  border: 4px solid #fff;
  box-shadow: 5px 5px 0 var(--shadow);
}
.habitat-block.ocean { background: var(--water-2); }
.habitat-block.estuary { background: #88e0a2; }
.habitat-block.river { background: #56b9ff; }

.drawing-layout { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(300px, .8fr); gap: 2rem; align-items: start; }
.drawing-card { position: relative; background: #f1ead1; padding: .5rem; }
.drawing-card img { width: 100%; border: 3px solid #061a24; }
.pin {
  position: absolute;
  left: var(--x); top: var(--y);
  transform: translate(-50%, -50%);
  border: 3px solid var(--ink);
  background: var(--gold);
  color: var(--ink);
  font-weight: 900;
  box-shadow: 4px 4px 0 var(--shadow);
  padding: .35rem .45rem;
  cursor: pointer;
  animation: pinPulse 1.8s ease-in-out infinite;
}
.pin.active, .pin:hover { background: var(--coral); color: white; }
@keyframes pinPulse { 0%,100% { transform: translate(-50%,-50%) scale(1); } 50% { transform: translate(-50%,-60%) scale(1.06); } }
.label-chips { display: flex; gap: .5rem; flex-wrap: wrap; margin-top: 1rem; }
.label-chips button {
  border: 3px solid #b8fff2; background: rgba(12,53,67,.85); color: white;
  padding: .45rem .55rem; font-weight: 900; box-shadow: 3px 3px 0 var(--shadow); cursor: pointer;
}
.label-chips button.active, .label-chips button:hover { background: var(--gold); color: var(--ink); }

.chain-board { overflow: hidden; }
.chain { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: .7rem; margin: 1rem 0 2rem; }
.chain-block {
  width: 140px; min-height: 120px;
  display: grid; align-content: center; gap: .3rem;
  padding: .7rem;
  border: 4px solid #fff;
  box-shadow: 7px 7px 0 var(--shadow);
  color: var(--ink);
  text-align: center;
  cursor: pointer;
  font-weight: 900;
  transition: transform .2s ease, filter .2s ease;
}
.chain-block span { text-transform: uppercase; font-size: 1rem; }
.chain-block small { font-size: .8rem; }
.chain-block:hover, .chain-block.active { transform: translateY(-12px) rotate(-2deg); filter: brightness(1.12); }
.chain-block.sun { background: #ffd84d; }
.chain-block.algae { background: #69d666; }
.chain-block.mullet { background: #bdd8db; }
.chain-block.ray { background: #8e7bd6; color: #fff; }
.chain-block.shark { background: #7fa4a8; }
.chain-arrow { font-size: 2.4rem; color: var(--gold); text-shadow: 4px 4px 0 var(--shadow); animation: pulse 1.2s ease-in-out infinite; }
.chain-info { background: rgba(255,255,255,.08); padding: 1rem; border: 3px solid rgba(184,255,242,.6); font-size: 1.15rem; }
@keyframes pulse { 50% { transform: scale(1.16); opacity: .65; } }

.tide-grid, .impact-grid { display: grid; grid-template-columns: 1.35fr .85fr; gap: 2rem; align-items: stretch; }
.tide-lab {
  min-height: 430px;
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #8ddfff 0%, #e9fbff 38%, #d9ba72 39%, #b48954 100%);
}
.tide-sky { position: absolute; inset: 0; background: radial-gradient(circle at 75% 16%, #fff6b0 0 42px, transparent 44px); opacity: .65; }
.tide-water {
  position: absolute; left: 0; right: 0; bottom: 0;
  height: 62%;
  background:
    repeating-linear-gradient(0deg, rgba(255,255,255,.14) 0 8px, transparent 8px 18px),
    linear-gradient(180deg, rgba(55,217,222,.82), rgba(4,95,130,.86));
  clip-path: polygon(0 8%, 7% 4%, 15% 8%, 22% 3%, 31% 9%, 41% 5%, 54% 8%, 63% 4%, 74% 9%, 86% 5%, 100% 9%, 100% 100%, 0 100%);
  transition: height .45s ease;
  animation: waveShift 3s ease-in-out infinite alternate;
}
@keyframes waveShift { to { clip-path: polygon(0 4%, 7% 9%, 15% 5%, 22% 8%, 31% 4%, 41% 8%, 54% 3%, 63% 9%, 74% 5%, 86% 9%, 100% 4%, 100% 100%, 0 100%); } }
.sandbar { position: absolute; left: 8%; right: 8%; bottom: 7%; height: 62px; background: #f0c571; border: 4px solid rgba(7,32,42,.7); box-shadow: 5px 5px 0 rgba(0,0,0,.25); }
.tide-shark {
  position: absolute;
  width: 120px; height: 50px;
  left: 58%; bottom: 44%;
  background: #708b8f;
  clip-path: polygon(0 52%, 20% 14%, 66% 24%, 88% 0, 82% 43%, 100% 50%, 82% 58%, 88% 100%, 66% 76%, 20% 86%);
  filter: drop-shadow(6px 7px 0 rgba(0,0,0,.35));
  transition: left .45s ease, bottom .45s ease;
  animation: bob 1.4s ease-in-out infinite alternate;
}
.fish-school span {
  position: absolute; width: 42px; height: 18px; background: #c4e8e8;
  clip-path: polygon(0 50%, 25% 15%, 76% 24%, 100% 0, 90% 50%, 100% 100%, 76% 76%, 25% 85%);
  filter: drop-shadow(4px 4px 0 rgba(0,0,0,.18));
  transition: left .45s ease, bottom .45s ease;
}
.fish-school span:nth-child(1) { left: 16%; bottom: 47%; }
.fish-school span:nth-child(2) { left: 25%; bottom: 40%; transform: scale(.8); }
.fish-school span:nth-child(3) { left: 35%; bottom: 54%; transform: scale(.6); }
.fish-school span:nth-child(4) { left: 50%; bottom: 45%; transform: scale(.75); }
.tide-lab.low .tide-water { height: 43%; }
.tide-lab.low .tide-shark { left: 68%; bottom: 25%; }
.tide-lab.low .fish-school span:nth-child(1) { left: 8%; bottom: 29%; }
.tide-lab.low .fish-school span:nth-child(2) { left: 17%; bottom: 25%; }
.tide-lab.low .fish-school span:nth-child(3) { left: 30%; bottom: 34%; }
.tide-lab.low .fish-school span:nth-child(4) { left: 44%; bottom: 28%; }
.tide-lab.high .tide-water { height: 76%; }
.tide-lab.high .tide-shark { left: 50%; bottom: 60%; }
.tide-lab.high .fish-school span:nth-child(1) { left: 12%; bottom: 66%; }
.tide-lab.high .fish-school span:nth-child(2) { left: 25%; bottom: 60%; }
.tide-lab.high .fish-school span:nth-child(3) { left: 37%; bottom: 70%; }
.tide-lab.high .fish-school span:nth-child(4) { left: 47%; bottom: 62%; }
.slider-label {
  position: absolute;
  left: 1rem; right: 1rem; bottom: 1rem;
  display: grid; grid-template-columns: auto 1fr auto; gap: .8rem; align-items: center;
  background: rgba(3,17,24,.88); color: white;
  padding: .75rem;
  border: 3px solid #b8fff2;
  box-shadow: 4px 4px 0 var(--shadow);
  font-weight: 900;
}
.slider-label input { width: 100%; accent-color: var(--gold); }
@keyframes bob { to { transform: translateY(-10px); } }

.cleanup-scene { position: relative; min-height: 450px; overflow: hidden; background: #082332; }
.cleanup-scene img { width: 100%; height: 100%; min-height: 450px; object-fit: cover; filter: saturate(.85) brightness(.8); transition: filter .5s ease; }
.cleanup-scene.clean img { filter: saturate(1.22) brightness(1.08); }
.trash-block {
  position: absolute;
  left: var(--x); top: var(--y);
  transform: translate(-50%, -50%);
  border: 3px solid #111;
  background: var(--coral);
  color: white;
  padding: .45rem .55rem;
  font-weight: 900;
  box-shadow: 4px 4px 0 var(--shadow);
  cursor: pointer;
  animation: bob 1.6s ease-in-out infinite alternate;
}
.trash-block.cleaned { opacity: 0; pointer-events: none; transform: translate(-50%,-50%) scale(0); transition: all .25s ease; }
.cleanup-meter { height: 28px; border: 4px solid #b8fff2; background: #020d12; box-shadow: 4px 4px 0 var(--shadow); overflow: hidden; }
.cleanup-meter span { display: block; height: 100%; width: 0%; background: repeating-linear-gradient(90deg, var(--grass) 0 20px, #8cf29e 20px 25px); transition: width .25s ease; }

.inventory-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.inventory-slot {
  background: var(--panel);
  border: 4px solid #b8fff2;
  box-shadow: 7px 7px 0 var(--shadow);
  padding: 1.25rem;
  min-height: 210px;
  transition: transform .2s ease;
}
.inventory-slot:hover { transform: translateY(-8px); }
.inventory-slot span { font-size: 2.3rem; display: inline-block; margin-bottom: .6rem; }
.inventory-slot h3 { margin: 0 0 .5rem; color: var(--gold); }

.quote { background: radial-gradient(circle at 50% 35%, rgba(255,211,78,.18), transparent 28rem); }
.quote-box { position: relative; text-align: center; }
.quote-box blockquote { font-size: clamp(1.4rem, 3.4vw, 2.45rem); line-height: 1.28; margin: 0 0 1rem; font-weight: 900; }
.quote-name { color: var(--gold); font-weight: 900; }
.quote-cube { width: 64px; height: 64px; margin: 0 auto 1rem; background: linear-gradient(135deg, var(--water-2) 0 50%, var(--water) 50%); border: 4px solid #fff; box-shadow: 7px 7px 0 var(--shadow); animation: rotateBlock 3s ease-in-out infinite; }
@keyframes rotateBlock { 50% { transform: rotate(6deg) translateY(-10px); } }

.quiz-card { margin-top: 2rem; }
.quiz-options { display: grid; gap: .75rem; margin: 1rem 0; }
.quiz-options button {
  text-align: left;
  border: 4px solid #b8fff2;
  background: rgba(12,53,67,.88);
  color: white;
  padding: .8rem;
  font-weight: 900;
  box-shadow: 5px 5px 0 var(--shadow);
  cursor: pointer;
}
.quiz-options button:hover { background: var(--gold); color: var(--ink); }
.quiz-options button.correct { background: var(--grass); color: var(--ink); }
.quiz-options button.wrong { background: var(--coral); }
.quiz-status { color: var(--gold); font-weight: 900; }

.source-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 1rem; }
.source-card {
  min-height: 190px;
  background: rgba(6,34,47,.9);
  border: 4px solid #b8fff2;
  box-shadow: 7px 7px 0 var(--shadow);
  padding: 1rem;
  transition: transform .2s ease;
}
.source-card:hover { transform: translateY(-8px); background: var(--gold); color: var(--ink); }
.source-card strong { display: block; font-size: 1.1rem; margin-bottom: .65rem; text-transform: uppercase; }
.source-card span { color: inherit; }
.closing-card { text-align: center; width: min(100%, 850px); margin: 2rem auto 0; }

.toast {
  position: fixed;
  right: 1rem; bottom: 1rem;
  z-index: 100;
  max-width: min(92vw, 420px);
  background: var(--gold);
  color: var(--ink);
  font-weight: 900;
  padding: 1rem;
  border: 4px solid white;
  box-shadow: 7px 7px 0 var(--shadow);
  transform: translateY(140%);
  transition: transform .28s ease;
}
.toast.show { transform: translateY(0); }
.confetti-layer { position: fixed; inset: 0; pointer-events: none; z-index: 110; overflow: hidden; }
.confetti {
  position: absolute; top: -20px;
  width: 16px; height: 16px;
  background: var(--gold);
  border: 2px solid rgba(0,0,0,.25);
  animation: fall 1.4s linear forwards;
}
.confetti:nth-child(3n) { background: var(--teal); }
.confetti:nth-child(4n) { background: var(--coral); }
.confetti:nth-child(5n) { background: var(--water-2); }
@keyframes fall { to { transform: translateY(110vh) rotate(520deg); opacity: 0; } }

.reveal { opacity: 0; transform: translateY(34px); transition: opacity .7s ease, transform .7s ease; }
.reveal.show { opacity: 1; transform: translateY(0); }

@media (max-width: 980px) {
  .site-header { left: .5rem; right: .5rem; top: .5rem; flex-wrap: wrap; }
  .top-nav { order: 3; width: 100%; justify-content: flex-start; }
  .two-col, .drawing-layout, .tide-grid, .impact-grid { grid-template-columns: 1fr; }
  .map-grid, .inventory-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .source-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stat-grid { grid-template-columns: 1fr; }
  .section { padding-top: 9.5rem; }
}

@media (max-width: 640px) {
  .map-grid, .inventory-grid, .source-grid { grid-template-columns: 1fr; }
  .habitat-stack { grid-template-columns: 1fr; }
  .chain-block { width: 100%; min-height: 90px; }
  .chain-arrow { transform: rotate(90deg); }
  .slider-label { grid-template-columns: 1fr; text-align: center; }
  h1 { font-size: 3rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; transition-duration: .001ms !important; }
}