/* The Fish of Issyk-Kul — palette: night water, moonlight, the gold of
   the torch and fish eyes, ember for the predators, blue for the lake. */
:root {
  --night: #0d141b;
  --line: rgba(200, 220, 235, 0.15);
  --snow: #eef2f5;
  --rain: #9fb4c4;
  --ember: #e0674b;
  --blue: #6fa3d6;
  --gold: #f0bd55;
  --serif: "Cormorant Garamond", Georgia, serif;
  --sans: "Jost", system-ui, sans-serif;
  --gutter: clamp(16px, 5vw, 72px);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--night); color: var(--snow); font: 300 clamp(18px, 1.25vw, 21px)/1.6 var(--serif); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
a { color: inherit; }
em { font-style: italic; color: var(--blue); }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
:focus-visible { outline: 1px solid var(--gold); outline-offset: 4px; }
.kicker { font: 400 12px/1.4 var(--sans); letter-spacing: .28em; text-transform: uppercase; color: var(--gold); }
.note { font: 300 13px/1.6 var(--sans); color: var(--rain); }

/* top bar & menu */
.topbar { position: fixed; inset: 0 0 auto 0; z-index: 50; display: flex; justify-content: space-between; align-items: center; padding: 22px var(--gutter) 30px; transition: background .5s, opacity .8s; }
.is-intro .topbar { opacity: 0; pointer-events: none; }
.topbar.solid { background: linear-gradient(var(--night) 50%, rgba(13, 20, 27, 0)); }
.wordmark { text-decoration: none; font: 500 13px/1 var(--sans); letter-spacing: .3em; }
.wordmark span { display: block; margin-top: 8px; font-size: 10px; letter-spacing: .25em; text-transform: uppercase; color: var(--rain); }
.menu-btn { width: 30px; height: 22px; position: relative; }
.menu-btn span { position: absolute; left: 0; right: 0; height: 1.5px; background: var(--snow); transition: transform .4s, opacity .4s; }
.menu-btn span:nth-child(1) { top: 2px; }
.menu-btn span:nth-child(2) { top: 10px; right: 8px; }
.menu-btn span:nth-child(3) { top: 18px; }
.menu-open .menu-btn span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.menu-open .menu-btn span:nth-child(2) { opacity: 0; }
.menu-open .menu-btn span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
.menu { position: fixed; inset: 0; z-index: 40; background: rgba(6, 10, 15, .97); display: grid; place-items: center; opacity: 0; pointer-events: none; transition: opacity .5s; }
.menu-open .menu { opacity: 1; pointer-events: auto; }
.menu ol { list-style: none; margin: 0; padding: 0 var(--gutter); counter-reset: m; }
.menu li { counter-increment: m; }
.menu a { display: flex; align-items: baseline; gap: 18px; font: 300 clamp(24px, 4vw, 42px)/1.35 var(--serif); text-decoration: none; color: var(--rain); transition: color .3s; }
.menu a::before { content: "0" counter(m); font: 400 11px var(--sans); letter-spacing: .2em; color: var(--gold); }
.menu a:hover { color: var(--snow); }

/* hero */
.hero { position: relative; height: 100vh; height: 100svh; min-height: 560px; overflow: hidden; background: #05080d; }
.land, #eyes { position: absolute; inset: 0; width: 100%; height: 100%; }
.clouds { animation: drift 50s linear infinite alternate; }
@keyframes drift { to { transform: translateX(-140px); } }
.ripples ellipse { transform-box: fill-box; transform-origin: center; animation: ripple 4s ease-out infinite; }
.ripples ellipse:nth-child(2) { animation-delay: -1s; }
.ripples ellipse:nth-child(3) { animation-delay: -2s; }
.ripples ellipse:nth-child(4) { animation-delay: -3s; }
@keyframes ripple { from { transform: scale(.3); opacity: 1; } to { transform: scale(1.6); opacity: 0; } }
.hero::after { content: ""; position: absolute; inset: auto 0 0 0; height: 30%; background: linear-gradient(transparent, var(--night)); pointer-events: none; }

.intro-lines { position: absolute; z-index: 3; left: var(--gutter); right: var(--gutter); top: 32%; text-align: center; pointer-events: none; }
.intro-line { position: absolute; left: 0; right: 0; margin: 0 auto; max-width: 22ch; font: 300 clamp(28px, 3.6vw, 52px)/1.2 var(--serif); opacity: 0; transform: translateY(12px); transition: opacity 1.3s, transform 1.3s; }
.intro-line.on { opacity: 1; transform: none; }
.skip-intro { position: absolute; z-index: 3; right: var(--gutter); bottom: 6vh; display: flex; align-items: center; gap: 14px; font: 400 11px var(--sans); letter-spacing: .25em; text-transform: uppercase; color: var(--rain); transition: opacity .8s; }
.ring-arrow { width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 50%; display: grid; place-items: center; font-size: 18px; color: var(--snow); }
.skip-intro:hover .ring-arrow { border-color: var(--gold); }
.hero-title, .scroll-cue { opacity: 0; transition: opacity 1.6s .3s; pointer-events: none; }
body:not(.is-intro) .hero-title, body:not(.is-intro) .scroll-cue { opacity: 1; pointer-events: auto; }
body:not(.is-intro) .intro-lines, body:not(.is-intro) .skip-intro { opacity: 0; pointer-events: none; }
.hero-title { position: absolute; z-index: 2; left: var(--gutter); right: var(--gutter); top: 20vh; }
.hero-title h1 { margin: 10px 0 0; font: 300 clamp(52px, 8.5vw, 132px)/.95 var(--serif); max-width: 12ch; }
.hero-title .sub { margin: 16px 0 0; font-style: italic; font-size: clamp(20px, 1.9vw, 28px); color: var(--rain); max-width: 30ch; }
.scroll-cue { position: absolute; z-index: 2; left: 50%; bottom: 3vh; transform: translateX(-50%); font: 400 10px var(--sans); letter-spacing: .3em; text-transform: uppercase; color: var(--rain); text-decoration: none; padding-bottom: 34px; }
.scroll-cue::after { content: ""; position: absolute; left: 50%; bottom: 0; width: 1px; height: 26px; background: linear-gradient(var(--rain), transparent); animation: drip 2.2s infinite; }
@keyframes drip { 0% { transform: scaleY(0); transform-origin: top; } 50% { transform: scaleY(1); transform-origin: top; } 51% { transform-origin: bottom; } 100% { transform: scaleY(0); transform-origin: bottom; } }

/* sections */
.section { padding: clamp(88px, 13vh, 170px) var(--gutter); max-width: 1320px; margin: 0 auto; position: relative; scroll-margin-top: 40px; }
.section-head { max-width: 780px; margin-bottom: clamp(36px, 5vh, 64px); }
.section-head h2, .diver h2 { margin: 18px 0 16px; font: 300 clamp(40px, 5vw, 72px)/1.05 var(--serif); }
.lede { margin: 0; font-size: clamp(20px, 1.7vw, 26px); color: var(--rain); font-style: italic; }
h3 { font: 400 clamp(22px, 2vw, 28px)/1.2 var(--serif); margin: 0 0 12px; }
.narrow { max-width: 780px; }
.big { font: 300 clamp(26px, 3vw, 40px)/1.35 var(--serif); margin: 0; }
.two { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); gap: clamp(32px, 6vw, 96px); align-items: center; }
.two p:first-child { margin-top: 0; }
@media (max-width: 820px) { .two { grid-template-columns: minmax(0, 1fr); } }
.pull { margin: 64px 0 0; max-width: 920px; padding-left: 28px; border-left: 2px solid var(--ember); font: 300 clamp(26px, 3vw, 40px)/1.35 var(--serif); font-style: italic; }
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 1.1s ease, transform 1.1s ease; }
.reveal.in { opacity: 1; transform: none; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(10px); } }


/* hero extras */
.stars circle { animation: twinkle 4s ease-in-out infinite alternate; }
@keyframes twinkle { to { opacity: .25; } }
.hero-title .sub { max-width: 36ch; }

/* 1. torch */
.torch { position: relative; height: 440px; border-radius: 10px; overflow: hidden; background: #03070b; box-shadow: 0 0 0 1px var(--line); touch-action: none; cursor: none; }
.torch canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.torch-hint { position: absolute; left: 0; right: 0; top: 18px; margin: 0; text-align: center; font: 400 11px var(--sans); letter-spacing: .25em; text-transform: uppercase; color: var(--rain); pointer-events: none; transition: opacity .8s; }
.torch.used .torch-hint { opacity: 0; }
.torch-count { position: absolute; left: 0; right: 0; bottom: 16px; margin: 0; text-align: center; font: italic 300 18px var(--serif); color: var(--gold); pointer-events: none; }
.two + .narrow { margin-top: 40px; }

/* 2. fish */
.fish { max-width: none; background: linear-gradient(transparent, rgba(111, 163, 214, .06), transparent); }
.fish > * { max-width: calc(1320px - 2 * var(--gutter)); margin-left: auto; margin-right: auto; }
.fish-grid { display: grid; grid-template-columns: 1fr 1fr 1.2fr; gap: clamp(20px, 3vw, 40px); align-items: start; }
@media (max-width: 960px) { .fish-grid { grid-template-columns: 1fr 1fr; } .fish-detail { grid-column: 1 / -1; } }
@media (max-width: 600px) { .fish-grid { grid-template-columns: minmax(0, 1fr); } }
.col-title { font: 400 11px/1.5 var(--sans); letter-spacing: .22em; text-transform: uppercase; margin-bottom: 16px; }
.col-title.native { color: var(--blue); } .col-title.alien { color: var(--ember); }
.fish-card { display: grid; grid-template-columns: 1fr auto; width: 100%; text-align: left; padding: 16px 18px; margin-bottom: 10px; border: 1px solid var(--line); border-radius: 8px; transition: border-color .3s, background .3s; }
.fish-card:hover { border-color: var(--rain); }
.fish-card[aria-pressed="true"] { border-color: var(--gold); background: rgba(240, 189, 85, .07); }
.fname { font: 400 24px/1.2 var(--serif); }
.fsub { grid-column: 1; font: 300 13px var(--sans); color: var(--rain); letter-spacing: .04em; }
.ftag { grid-column: 2; grid-row: 1 / 3; align-self: center; font: 400 10px var(--sans); letter-spacing: .18em; text-transform: uppercase; padding: 5px 10px; border-radius: 999px; border: 1px solid var(--ember); color: var(--ember); }
.ftag.red { border-color: var(--blue); color: var(--blue); }
.fish-detail { padding: 28px; border-left: 1px solid var(--gold); min-height: 260px; }
.fish-detail h3 { font-size: clamp(30px, 3vw, 42px); font-weight: 300; margin: 10px 0 14px; }
.fish-detail p { margin: 0; }
.fish-detail.swap > * { animation: fadeUp .6s both; }

/* 3. timeline */
.timeline { list-style: none; margin: 0; padding: 0; max-width: 900px; border-left: 1px solid var(--line); }
.timeline li { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 24px; padding: 0 0 40px 28px; position: relative; }
.timeline li::before { content: ""; position: absolute; left: -6px; top: 10px; width: 11px; height: 11px; border-radius: 50%; background: var(--night); border: 1px solid var(--rain); }
.timeline li.dark::before { background: var(--ember); border-color: var(--ember); }
.timeline li.light::before { background: var(--gold); border-color: var(--gold); }
.yr { font: 400 13px/2 var(--sans); letter-spacing: .2em; color: var(--gold); }
.timeline h3 { margin-bottom: 6px; }
.timeline p { margin: 0; color: #cdd6dd; }
.timeline .dark h3 { color: var(--ember); }
@media (max-width: 600px) { .timeline li { grid-template-columns: minmax(0, 1fr); gap: 4px; } }
.note-big { color: var(--rain); font-style: italic; margin-top: 24px; }

/* 4. climate */
.climate { max-width: none; background: radial-gradient(ellipse at 80% 20%, rgba(111, 163, 214, .09), transparent 60%); }
.climate > * { max-width: calc(1320px - 2 * var(--gutter)); margin-left: auto; margin-right: auto; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.stat { background: var(--night); padding: 32px 26px; }
.stat b { font: 300 clamp(52px, 6vw, 84px)/1 var(--serif); color: var(--blue); }
.stat > span { font: 300 32px var(--serif); color: var(--blue); }
.stat p { margin: 12px 0 0; font-size: .95em; color: #cdd6dd; }
.climate .note { margin: 14px 0 64px; }
.shore svg { width: 100%; height: auto; display: block; border-radius: 10px; }
.lake-water { transition: transform .2s; }
.spawn circle { transition: opacity .4s; }
.slider { display: flex; align-items: center; gap: 14px; margin-top: 16px; font: 400 11px var(--sans); letter-spacing: .2em; text-transform: uppercase; color: var(--rain); }
.slider input { flex: 1; accent-color: var(--gold); }
.lvl-out { min-width: 7ch; text-align: right; color: var(--gold); }

/* 5. solutions */
.sol-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; }
.sol-grid article { padding: 30px 26px; border: 1px solid var(--line); border-radius: 10px; background: rgba(255, 255, 255, .015); }
.sol-grid h3 { margin: 10px 0 12px; }
.sol-grid p { margin: 0; font-size: .95em; color: #cdd6dd; }

/* 6. trout */
.trout { max-width: none; background: linear-gradient(transparent, rgba(224, 103, 75, .07), transparent); }
.trout > * { max-width: calc(1320px - 2 * var(--gutter)); margin-left: auto; margin-right: auto; }
.trout > .narrow { max-width: 780px; }
.trout > .big { margin-bottom: 48px; }
.scale { display: grid; grid-template-columns: 1fr 60px 1fr; gap: 20px; align-items: stretch; margin-bottom: 48px; }
.pan { padding: 26px; border-radius: 10px; }
.pan.give { border: 1px solid var(--gold); }
.pan.take { border: 1px solid var(--ember); }
.pan.give h3 { color: var(--gold); } .pan.take h3 { color: var(--ember); }
.pan ul { margin: 0; padding-left: 20px; }
.pan li { margin-bottom: 8px; }
.beam { display: grid; place-items: center; }
.beam i { width: 1px; height: 100%; background: linear-gradient(transparent, var(--rain), transparent); animation: tilt 5s ease-in-out infinite alternate; }
@keyframes tilt { from { transform: rotate(-8deg); } to { transform: rotate(8deg); } }
@media (max-width: 720px) { .scale { grid-template-columns: minmax(0, 1fr); } .beam { display: none; } }

/* 7. concept map */
.cmap { position: relative; width: 100%; aspect-ratio: 1000 / 640; }
.cmap-lines { position: absolute; inset: 0; width: 100%; height: 100%; }
.cmap-lines line { stroke: var(--line); stroke-width: 1.5; vector-effect: non-scaling-stroke; transition: stroke .3s; }
.cmap-lines line.on { stroke: var(--gold); }
.cmap-nodes { position: absolute; inset: 0; }
.node { position: absolute; transform: translate(-50%, -50%); border-radius: 50%; width: var(--s); height: var(--s); display: grid; place-items: center; text-align: center; padding: 10px; font: 400 12px/1.25 var(--sans); letter-spacing: .06em; text-transform: uppercase; background: color-mix(in srgb, var(--c) 18%, var(--night)); box-shadow: 0 0 0 1px var(--c); transition: transform .3s, background .3s, box-shadow .3s; }
.node:hover { transform: translate(-50%, -50%) scale(1.06); }
.node[aria-pressed="true"] { background: var(--c); color: var(--night); box-shadow: 0 0 0 1px var(--c), 0 0 36px color-mix(in srgb, var(--c) 55%, transparent); }
.node.center { font: 400 clamp(16px, 2vw, 24px)/1.1 var(--serif); text-transform: none; letter-spacing: 0; }
.cmap-detail { max-width: 780px; margin: 40px auto 0; padding: 26px 28px; border-left: 1px solid var(--gold); min-height: 200px; }
.cmap-detail h3 { margin: 8px 0 12px; font-size: clamp(26px, 2.6vw, 36px); font-weight: 300; }
.cmap-detail ul { margin: 0; padding-left: 20px; }
.cmap-detail li { margin-bottom: 6px; }
.cmap-detail.swap > * { animation: fadeUp .6s both; }
@media (max-width: 720px) {
  .cmap { aspect-ratio: auto; }
  .cmap-lines { display: none; }
  .cmap-nodes { position: static; display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
  .node { position: static; transform: none; width: auto; height: auto; border-radius: 999px; padding: 10px 16px; }
  .node:hover { transform: none; }
  .node.center { flex-basis: 100%; border-radius: 10px; }
}

/* 8. readings */
.readings { max-width: none; background: linear-gradient(var(--night), #2a2a24 30%, #3a3322); }
.readings > * { max-width: calc(1320px - 2 * var(--gutter)); margin-left: auto; margin-right: auto; }
.readings em { color: var(--gold); }
.read-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1px; background: rgba(240, 189, 85, .2); border: 1px solid rgba(240, 189, 85, .2); }
.read-grid article { background: #2e2a1f; padding: 36px 30px; }
.read-grid h3 { margin: 10px 0 16px; color: var(--gold); }
.read-grid .book { color: #cfc6ad; font-size: .95em; padding-left: 16px; border-left: 1px solid var(--gold); }
.read-grid b { font-weight: 500; }
.t-prob { color: var(--gold); } .t-emo { color: #8fc0ec; } .t-mean { color: #e8a08e; }
.closing { margin-top: 64px; }
.readings > .closing { max-width: 780px; }
.pull.hope { border: 0; padding: 0; text-align: center; color: var(--gold); font-size: clamp(30px, 4vw, 54px); margin: 80px auto 0; }

/* 9. sources */
.sources { max-width: none; background: #3a3322; }
.sources > * { max-width: 1000px; margin-left: auto; margin-right: auto; }
.refs { list-style: none; margin: 0; padding: 0; }
.refs li { padding: 18px 0 18px 150px; position: relative; border-top: 1px solid rgba(240, 189, 85, .2); font-size: .95em; color: #e6dfcb; overflow-wrap: anywhere; }
.refs .rtype { position: absolute; left: 0; top: 22px; font: 400 10px var(--sans); letter-spacing: .2em; text-transform: uppercase; color: var(--gold); }
.refs a { color: var(--gold); }
@media (max-width: 600px) { .refs li { padding-left: 0; padding-top: 40px; } }

.footer { display: grid; gap: 14px; padding: 40px var(--gutter); background: #2a251b; border-top: 1px solid rgba(240, 189, 85, .2); font: 400 12px/1.6 var(--sans); letter-spacing: .08em; color: #cfc6ad; }
.footer p { margin: 0; max-width: 900px; }
.footer .disclosure { font-style: italic; letter-spacing: .02em; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after { animation: none !important; }
}