/* Fish Party — the showcase site (v2: Home · Host · About) */
:root {
  --deep: #031426; --sea: #072a45; --shelf: #0b3a5c;
  --foam: #e8f6ff; --mist: #9fc3dd; --faint: #6e93b0;
  --coral: #ff8a5c; --sun: #ffd166; --kelp: #3ddc97; --line: rgba(159, 195, 221, .18);
  --card: rgba(255, 255, 255, .04);
  --radius: 18px;
  --font: ui-rounded, "SF Pro Rounded", "Nunito", "Segoe UI", system-ui, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; font: 17px/1.6 var(--font); color: var(--foam);
  background: linear-gradient(180deg, #0b4a6e 0, var(--sea) 520px, var(--deep) 1400px, #01070f 100%);
  background-color: var(--deep);
}
a { color: var(--sun); }
.wrap { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 16px; }

/* top bar: three tabs */
header.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 18px 0; }
.brand { white-space: nowrap; font-weight: 800; font-size: 1.25rem; color: var(--foam); text-decoration: none; }
nav.tabs { display: flex; gap: 4px; flex-wrap: wrap; justify-content: flex-end; }
nav.tabs a {
  color: var(--mist); text-decoration: none; font-size: .95rem; font-weight: 700;
  padding: 7px 14px; border-radius: 999px; white-space: nowrap;
}
nav.tabs a:hover { color: var(--foam); background: var(--card); }
nav.tabs a[aria-current=page] { color: var(--foam); background: rgba(255, 255, 255, .1); }

/* hero */
.hero { padding: 36px 0 8px; text-align: center; }
.hero h1 { font-size: clamp(2.3rem, 7vw, 4.4rem); line-height: 1.05; margin: 0 0 14px; font-weight: 800; letter-spacing: -.01em; }
.hero h1 em { font-style: normal; color: var(--sun); }
p.lead { font-size: clamp(1.05rem, 2.4vw, 1.25rem); color: var(--mist); max-width: 620px; margin: 0 auto 28px; }

/* the two doors */
.doors { display: grid; grid-template-columns: 1fr; gap: 14px; max-width: 760px; margin: 0 auto; text-align: left; }
.door {
  display: flex; gap: 16px; align-items: center; padding: 20px 22px; border-radius: var(--radius);
  text-decoration: none; color: var(--foam); border: 2px solid var(--line); background: var(--card);
  transition: transform .12s, border-color .12s;
}
.door:hover { transform: translateY(-3px); border-color: var(--mist); }
.door .ic { font-size: 2.2rem; line-height: 1; flex: none; }
.door b { display: block; font-size: 1.2rem; line-height: 1.25; }
.door span.sub { display: block; color: var(--mist); font-size: .95rem; margin-top: 2px; }
.door.primary { background: var(--sun); border-color: var(--sun); color: #2a1d00; }
.door.primary span.sub { color: #5c4300; }
.door .go { margin-left: auto; font-size: 1.4rem; opacity: .7; }

/* live tank window */
.window {
  position: relative; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--line); box-shadow: 0 30px 80px rgba(0,0,0,.45);
  aspect-ratio: 16 / 9; background: #0f4f60; isolation: isolate;
}
.window iframe { position: absolute; inset: -1px; width: calc(100% + 2px); height: calc(100% + 2px); border: 0; display: block; }
.window .tag {
  position: absolute; left: 14px; bottom: 14px; z-index: 2; padding: 6px 12px; border-radius: 999px;
  background: rgba(3, 20, 38, .7); backdrop-filter: blur(6px); font-size: .85rem; color: var(--mist); text-decoration: none;
}
.window .tag b { color: var(--foam); }

/* sections */
section { padding: 64px 0 8px; }
h2 { font-size: clamp(1.7rem, 4.2vw, 2.4rem); line-height: 1.15; margin: 0 0 10px; font-weight: 800; }
h3 { margin: 0 0 6px; font-size: 1.2rem; }
.kicker { color: var(--kelp); font-weight: 700; text-transform: uppercase; letter-spacing: .12em; font-size: .78rem; margin-bottom: 6px; }
p.intro { color: var(--mist); max-width: 680px; margin: 0 0 24px; }
.muted { color: var(--mist); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }

.steps { display: grid; grid-template-columns: 1fr; gap: 16px; }
.step { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 22px 20px; }
.step .n { font-size: 2rem; line-height: 1; margin-bottom: 10px; }
.step p { margin: 0; color: var(--mist); font-size: .98rem; }
.note-line { margin: 18px 0 0; color: var(--mist); font-size: .98rem; }
.note-line b { color: var(--foam); }
.ctas { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 22px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; min-height: 48px; padding: 0 22px;
  border-radius: 999px; font: 700 1rem var(--font); text-decoration: none; cursor: pointer;
  border: 2px solid transparent; transition: transform .12s;
}
.btn:hover { transform: translateY(-2px); }
.btn.primary { background: var(--sun); color: #2a1d00; }
.btn.ghost { border-color: var(--line); color: var(--foam); background: var(--card); }

/* Host: the four chapters */
.toc { display: flex; gap: 8px; flex-wrap: wrap; margin: 4px 0 0; padding: 0; list-style: none; }
.toc a {
  display: inline-block; padding: 6px 14px; border-radius: 999px; border: 1px solid var(--line);
  color: var(--mist); text-decoration: none; font-size: .9rem; font-weight: 700;
}
.toc a:hover { color: var(--foam); border-color: var(--mist); }
.chapter { scroll-margin-top: 12px; }
.chapter > .num {
  display: inline-flex; align-items: center; justify-content: center; width: 34px; height: 34px; border-radius: 50%;
  background: var(--kelp); color: #022; font-weight: 800; margin-bottom: 10px;
}
.two { display: grid; grid-template-columns: 1fr; gap: 16px; }

/* bubbles legend */
.legend { display: grid; gap: 10px; }
.legend .row { display: flex; align-items: center; gap: 12px; color: var(--mist); font-size: .95rem; }
.bubble { flex: none; border-radius: 50%; border: 1.5px solid rgba(255,255,255,.55); }
.ramp { display: flex; gap: 6px; align-items: center; flex: none; }
.ramp span { width: 20px; height: 20px; border-radius: 50%; border: 1.5px solid rgba(255,255,255,.5); }
.sources { display: grid; grid-template-columns: 1fr; gap: 12px; margin-top: 18px; }
.sources .card { padding: 18px; }
.sources .card p { margin: 4px 0 0; color: var(--mist); font-size: .95rem; }
.sources .tagline { font-size: .75rem; font-weight: 800; text-transform: uppercase; letter-spacing: .1em; color: var(--kelp); }

/* step by step */
ol.guide { list-style: none; counter-reset: g; margin: 0; padding: 0; display: grid; gap: 14px; }
ol.guide > li { counter-increment: g; position: relative; padding: 20px 20px 20px 64px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); }
ol.guide > li::before {
  content: counter(g); position: absolute; left: 18px; top: 18px; width: 32px; height: 32px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center; font-weight: 800; color: #2a1d00; background: var(--sun);
}
ol.guide h3 { font-size: 1.1rem; }
ol.guide p { margin: 6px 0 0; color: var(--mist); }
ol.guide ul { margin: 8px 0 0; padding-left: 1.2em; color: var(--mist); }
ol.guide li li { margin: 3px 0; }
ol.guide li b { color: var(--foam); }
code { font: .9em var(--mono); background: rgba(255,255,255,.07); padding: 1px 6px; border-radius: 6px; color: #cfe8ff; }
pre {
  margin: 12px 0 0; background: #010b16; border: 1px solid var(--line); border-radius: 14px; padding: 16px;
  overflow-x: auto; font: .88rem/1.6 var(--mono); color: #cfe8ff;
}
pre .c { color: var(--faint); }

/* templates */
.grid12 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 12px; }
.tpl {
  background: #f7fbff; border-radius: 14px; padding: 10px 8px 8px; text-align: center; text-decoration: none;
  color: #1a3550; font-size: .8rem; font-weight: 700; display: flex; flex-direction: column; gap: 6px; transition: transform .12s;
}
.tpl:hover { transform: translateY(-3px) rotate(-1deg); }
.tpl img { width: 100%; aspect-ratio: 1; object-fit: contain; }

/* for your AI */
.ai { background: radial-gradient(120% 140% at 0% 0%, rgba(61,220,151,.14), transparent 60%), var(--card); border: 1px solid var(--line); border-radius: calc(var(--radius) + 6px); padding: 26px 22px; }
.prompt { position: relative; }
.prompt pre { white-space: pre-wrap; padding-right: 16px; padding-top: 52px; }
.copy {
  position: absolute; top: 10px; right: 10px; min-height: 36px; padding: 0 14px; border-radius: 999px; border: 0;
  background: var(--sun); color: #2a1d00; font: 700 .9rem var(--font); cursor: pointer;
}

/* About */
.story { display: grid; grid-template-columns: 1fr; gap: 24px; align-items: center; }
.shot { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); aspect-ratio: 16/9; background: url(img/tank.jpg) center / cover; display: block; }
.facts { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.facts li { color: var(--mist); }
.facts li b { color: var(--foam); }

footer.end { padding: 72px 0 40px; color: var(--faint); font-size: .9rem; text-align: center; }
footer.end a { color: var(--mist); }
.fish-line { font-size: 1.6rem; letter-spacing: .4em; margin-bottom: 14px; opacity: .8; }

@media (min-width: 720px) {
  .doors { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .grid12 { grid-template-columns: repeat(6, 1fr); }
  .two { grid-template-columns: 1fr 1fr; }
  .sources { grid-template-columns: repeat(3, 1fr); }
  .story { grid-template-columns: 1.2fr 1fr; }
  .ai { padding: 36px; }
}
@media (max-width: 560px) {
  header.top { flex-wrap: wrap; }
  nav.tabs { width: 100%; justify-content: flex-start; margin-left: -14px; }
  .window { aspect-ratio: 4 / 3; }
}
@media (prefers-reduced-motion: reduce) { .btn, .tpl, .door { transition: none; } html { scroll-behavior: auto; } }
/* a grid item never grows wider than its column (long code lines scroll inside pre) */
ol.guide > li, .two > *, .steps > *, .sources > * { min-width: 0; }
/* home hero, as in v1: two pill buttons, the live tank right under */
.hero-ctas { justify-content: center; margin-top: 0; }
.hero-ctas .btn { min-height: 50px; padding: 0 24px; font-size: 1.05rem; }
.hero-window { margin: 36px auto 0; }

/* Collective tank page (the v1 "shared tank" block) */
.commons {
  display: grid; grid-template-columns: 1fr; gap: 24px; align-items: center;
  background: radial-gradient(120% 140% at 0% 0%, rgba(61,220,151,.14), transparent 60%), rgba(255,255,255,.03);
  border: 1px solid var(--line); border-radius: calc(var(--radius) + 6px); padding: 28px 22px;
}
.counter { font-size: clamp(2.6rem, 8vw, 4rem); font-weight: 800; line-height: 1; color: var(--kelp); }
.counter small { display: block; font-size: 1rem; font-weight: 600; color: var(--mist); margin-top: 6px; }
.commons ul { margin: 0 0 6px; padding-left: 1.2em; color: var(--mist); }
.commons li { margin: 4px 0; }
@media (min-width: 720px) { .commons { grid-template-columns: 1fr 1.4fr; padding: 40px; } }
.foot-links { margin-bottom: 8px; }
/* phone: the five tabs on one line */
@media (max-width: 560px) {
  nav.tabs { flex-wrap: nowrap; gap: 0; overflow-x: auto; scrollbar-width: none; }
  nav.tabs a { font-size: .8rem; padding: 6px 6px; }
}

/* How it works: the steps as one line down the left */
ol.timeline { list-style: none; counter-reset: t; margin: 22px 0 0; padding: 0; position: relative; }
ol.timeline > li { counter-increment: t; position: relative; padding: 0 0 34px 58px; min-width: 0; }
ol.timeline > li::before {
  content: counter(t); position: absolute; left: 0; top: -2px; width: 38px; height: 38px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center; font-weight: 800; color: #2a1d00; background: var(--sun); z-index: 1;
}
ol.timeline > li::after { content: ""; position: absolute; left: 18px; top: 36px; bottom: 0; width: 2px; background: var(--line); }
ol.timeline > li.last::after { display: none; }
ol.timeline > li.last { padding-bottom: 0; }
ol.timeline h3 { font-size: 1.2rem; margin: 4px 0 6px; }
ol.timeline p { margin: 0; color: var(--mist); max-width: 680px; }
ol.timeline .grid12 { margin-top: 14px; }
ol.timeline p b { color: var(--foam); }

/* How it works: a picture to the right of a step */
ol.timeline > li.with-media { display: grid; grid-template-columns: 1fr; gap: 16px; }
@media (min-width: 860px) { ol.timeline > li.with-media { grid-template-columns: 1fr 1fr; gap: 28px; align-items: start; } }
.media figure { margin: 0; }
.media figcaption { color: var(--faint); font-size: .82rem; margin-top: 6px; text-align: center; }
.media .paper { background: #fff; border-radius: 12px; padding: 12px; box-shadow: 0 10px 30px rgba(0,0,0,.35); aspect-ratio: 1; display: flex; align-items: center; justify-content: center; }
.media .paper img { width: 100%; height: 100%; object-fit: contain; }
.media.pair { display: grid; grid-template-columns: 1.2fr 1fr; gap: 14px; align-items: start; }
.media .phone { width: 100%; max-width: 190px; display: block; margin: 0 auto; border-radius: 18px; border: 3px solid #1d3a5c; box-shadow: 0 10px 30px rgba(0,0,0,.35); }
.media.flow { display: grid; grid-template-columns: 1fr auto 1fr; gap: 10px; align-items: center; }
.media.flow .arrow { font-size: 1.6rem; color: var(--sun); font-weight: 800; }
.media .water { aspect-ratio: 1; border-radius: 12px; overflow: hidden; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(180deg, #1b6f7a, #0f4f60 60%, #0a3346); box-shadow: 0 10px 30px rgba(0,0,0,.35); }
.media .water { position: relative; }
.media .water .swim { position: absolute; left: 11%; top: 14%; width: 78%; animation: swim 3.2s ease-in-out infinite; }  /* absolute: it drifts on purpose */
@keyframes swim { 0%,100% { transform: translate(-6%, 3%) rotate(-5deg); } 50% { transform: translate(6%, -4%) rotate(4deg); } }
.slides { position: relative; aspect-ratio: 16 / 9; border-radius: 12px; overflow: hidden; box-shadow: 0 10px 30px rgba(0,0,0,.35); background: #0f4f60; }
.slides img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; animation: slide 9s infinite; }
.slides img:nth-child(1) { animation-delay: 0s; }   .slides img:nth-child(2) { animation-delay: 1.5s; }
.slides img:nth-child(3) { animation-delay: 3s; }   .slides img:nth-child(4) { animation-delay: 4.5s; }
.slides img:nth-child(5) { animation-delay: 6s; }   .slides img:nth-child(6) { animation-delay: 7.5s; }
@keyframes slide { 0% { opacity: 0; } 4% { opacity: 1; } 17% { opacity: 1; } 21% { opacity: 0; } 100% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) {
  .media .water .swim { animation: none; }
  .slides img { animation: none; } .slides img:first-child { opacity: 1; }
}
/* footer links: a finger-sized tap area on phones */
footer.end a { display: inline-block; padding: 6px 0; }
/* the embedded tanks are a view: let a finger on them scroll the page (PixiJS sets
   touch-action:none on its canvas, which froze the page on phones). The .tag link
   on top stays the way in. */
.window iframe { pointer-events: none; }