/* The home page's opening (lib/sky-story.mjs, static/sky-story). Always a dark sky window, like the app:
   gold for sun on the spot, shade blue, aurora green, glow pink. */
.sky { --head: 61px; --stage: calc(100svh - var(--head)); position: relative; background: #05080d; color: #f3f1ea;
  --gold: #ffb944; --gold-2: #ffd98a; --blue: #88adfe; --green: #6df0a8; --pink: #ff8fb1; }
.sky-stage { position: sticky; top: var(--head); height: var(--stage); overflow: hidden; isolation: isolate; }
.sky-canvas, .sky-fallback { position: absolute; inset: 0; }
.sky-canvas canvas { display: block; width: 100%; height: 100%; }
.sky-fallback svg { width: 100%; height: 100%; display: block; }
.sky-live .sky-fallback { opacity: 0; transition: opacity .8s; }
/* Scrims keep the copy and the bar readable over any sky. */
.sky-stage::before { content: ""; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background: linear-gradient(90deg, #05080dcc 0%, #05080d66 32%, transparent 58%), linear-gradient(0deg, #05080de6 0%, transparent 26%), linear-gradient(180deg, #05080d80 0%, transparent 16%); }

/* Labels placed by scene.js each frame. */
.sky-label { position: absolute; left: 0; top: 0; z-index: 2; pointer-events: none; white-space: nowrap; will-change: transform, opacity;
  font: 600 10px/1 -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif; letter-spacing: .14em; text-transform: uppercase; translate: -50% -150%; }
.sky-label.pin { padding: 6px 10px; border-radius: 999px; background: #0b1118b3; backdrop-filter: blur(10px); color: var(--blue); border: 0; }
[data-light="sun"] .sky-label.pin { color: var(--gold-2); }
.sky-label.peak { color: #ffffffb3; }
.sky-label.hour { font: 600 11px/1 ui-rounded, "SF Pro Rounded", -apple-system, system-ui, sans-serif; letter-spacing: 0; color: #ffffffd9; translate: -50% -190%; font-variant-numeric: tabular-nums; }

/* Eye level: a compass tape and the sun against the skyline, as in the app's AR. */
.sky-hud { position: absolute; inset: 0; z-index: 2; pointer-events: none; opacity: clamp(0, calc(var(--eye, 0) * 2.4 - 1.4), 1); }
.sky-tape { position: absolute; top: 9%; left: 50%; width: min(620px, 70vw); height: 34px; translate: -50% 0; overflow: hidden;
  mask: linear-gradient(90deg, transparent, #000 22%, #000 78%, transparent); }
.sky-tape-strip { position: absolute; left: 50%; top: 0; height: 100%; will-change: transform; }
.sky-tape-strip span { position: absolute; bottom: 0; width: 1px; height: 7px; background: #ffffff70; }
.sky-tape-strip span.major { height: 12px; background: #fff; }
.sky-tape-strip b { position: absolute; bottom: 16px; translate: -50% 0; font: 600 10px/1 ui-rounded, "SF Pro Rounded", -apple-system, system-ui, sans-serif; color: #fff; }
.sky-tape > i { position: absolute; left: 50%; bottom: 0; width: 2px; height: 16px; background: var(--gold); translate: -50% 0; border-radius: 2px; }
.sky-reticle { position: absolute; left: 50%; top: 50%; width: 64px; height: 64px; translate: -50% -50%; border-radius: 50%; border: 1px solid #ffffff55; }
.sky-reticle::before, .sky-reticle::after { content: ""; position: absolute; background: #ffffff88; }
.sky-reticle::before { left: 50%; top: -10px; bottom: -10px; width: 1px; }
.sky-reticle::after { top: 50%; left: -10px; right: -10px; height: 1px; }
.sky-readout { position: absolute; left: 50%; bottom: 128px; translate: -50% 0; display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }
.sky-readout > span { padding: 8px 14px; border-radius: 999px; background: #0b1118b3; backdrop-filter: blur(14px); font: 600 11px/1 -apple-system, system-ui, sans-serif; letter-spacing: .1em; color: #ffffffb3; }
.sky-readout b { color: #fff; letter-spacing: 0; font: 600 13px/1 ui-rounded, "SF Pro Rounded", -apple-system, system-ui, sans-serif; font-variant-numeric: tabular-nums; margin-left: 6px; }
.sky-readout .hud-state { color: var(--gold-2); letter-spacing: .02em; font-size: 12px; }

/* The real app, beside the story. */
.sky-phone { position: absolute; z-index: 2; right: clamp(28px, 6vw, 120px); top: 50%; width: clamp(210px, 17vw, 262px); aspect-ratio: 390 / 844;
  translate: 0 -54%; padding: 9px; border-radius: 48px; background: linear-gradient(140deg, #4c515a, #15171b 32%, #0b0c0e 62%, #3a3e45);
  box-shadow: 0 0 0 1px #0009, 0 40px 90px #000c, 0 0 80px color-mix(in srgb, var(--accent, var(--gold)) 22%, transparent);
  transform: perspective(1400px) rotateY(calc(-9deg + var(--p, 0) * 6deg)) rotateX(2deg); transition: box-shadow .8s; }
.sky-phone-glass { position: relative; width: 100%; height: 100%; border-radius: 40px; overflow: hidden; background: #000; }
.sky-screen { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity .7s ease, transform .9s ease; transform: scale(1.04); }
.sky-screen.on { opacity: 1; transform: none; }
.sky-island { position: absolute; top: 9px; left: 50%; width: 30%; height: 22px; translate: -50% 0; border-radius: 99px; background: #000; }
.sky-stage[data-light="shade"] { --accent: var(--blue); }
.sky-stage[data-light="night"] { --accent: #9aa6ff; }
.sky-stage[data-light="aurora"] { --accent: var(--green); }

.sky-top { position: absolute; z-index: 3; top: 18px; left: clamp(20px, 5vw, 64px); right: clamp(20px, 5vw, 64px); display: flex; justify-content: space-between; align-items: center; pointer-events: none; }
.sky-brand { display: inline-flex; align-items: center; gap: 10px; font: 600 11px/1 -apple-system, system-ui, sans-serif; letter-spacing: .16em; text-transform: uppercase; color: #ffffffa6; }
.sky-brand i { width: 7px; height: 7px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 12px var(--gold); }
.sky-skip { position: absolute; z-index: 5; right: clamp(20px, 5vw, 64px); bottom: 30px; display: inline-flex; align-items: center; gap: 8px;
  font: 650 14px/1 -apple-system, system-ui, sans-serif; color: #0b1015; text-decoration: none; padding: 13px 20px; border-radius: 999px;
  background: #f3f1eaeb; backdrop-filter: blur(12px); box-shadow: 0 10px 30px #0006; transition: background .2s, transform .2s; }
.sky-skip:hover { background: #fff; transform: translateY(1px); }
.sky-skip:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }

/* Time, light and the seven chapters along the bottom. */
.sky-bar { position: absolute; z-index: 3; left: clamp(20px, 5vw, 64px); right: calc(clamp(20px, 5vw, 64px) + 200px); bottom: 26px; display: grid; grid-template-columns: auto 1fr; gap: 10px 40px; align-items: end; }
.sky-time { display: grid; gap: 6px; }
.sky-clock { font: 600 40px/1 ui-rounded, "SF Pro Rounded", -apple-system, system-ui, sans-serif; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.sky-state { display: inline-flex; align-items: center; gap: 8px; font: 600 12px/1.2 -apple-system, system-ui, sans-serif; color: var(--blue); }
.sky-state i { width: 8px; height: 8px; border-radius: 50%; background: currentColor; box-shadow: 0 0 10px currentColor; }
[data-light="sun"] .sky-state { color: var(--gold); }
[data-light="night"] .sky-state { color: #b3bcff; }
[data-light="aurora"] .sky-state { color: var(--green); }
.sky-date { font: 500 11px/1 -apple-system, system-ui, sans-serif; letter-spacing: .08em; color: #ffffff80; text-transform: uppercase; }
.sky-steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); }
.sky-steps li { margin: 0; }
.sky-steps a { display: grid; gap: 10px; justify-items: start; padding: 6px 0 12px; color: #ffffff73; text-decoration: none; font: 600 11px/1 -apple-system, system-ui, sans-serif; letter-spacing: .06em; text-transform: uppercase; transition: color .3s; }
.sky-steps a::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; transition: background .3s, box-shadow .3s; }
.sky-steps a:hover { color: #fff; }
.sky-steps a[aria-current] { color: #fff; }
.sky-steps a[aria-current]::before { background: var(--accent, var(--gold)); box-shadow: 0 0 12px var(--accent, var(--gold)); }
.sky-track { grid-column: 2; height: 2px; border-radius: 2px; background: #ffffff1f; margin-top: -10px; overflow: hidden; }
.sky-track span { display: block; height: 100%; width: calc(var(--p, 0) * 100%); background: linear-gradient(90deg, var(--gold), var(--pink) 62%, #9aa6ff 78%, var(--green)); }
.sky-credit { position: absolute; z-index: 3; right: clamp(20px, 5vw, 64px); top: 58px; margin: 0; font: 500 10px/1.4 -apple-system, system-ui, sans-serif; color: #ffffff59; }
.sky-credit a { color: inherit; }

/* Chapters scroll over the sticky stage, one screen each. */
.sky-chapters { position: relative; z-index: 4; margin-top: calc(-1 * var(--stage)); pointer-events: none; }
.sky-chapter { height: var(--stage); display: flex; align-items: center; padding: 0 clamp(20px, 6vw, 96px) 120px; }
.sky-card { max-width: 560px; pointer-events: auto; }
.sky-js .sky-card { opacity: var(--o, 1); transform: translateY(var(--y, 0)); will-change: opacity, transform; }
.sky-eyebrow { margin: 0 0 18px; font: 600 12px/1.3 -apple-system, system-ui, sans-serif; letter-spacing: .18em; color: var(--gold); }
.sky-chapter[data-chapter="2"] .sky-eyebrow { color: var(--blue); }
.sky-chapter[data-chapter="3"] .sky-eyebrow { color: var(--green); }
.sky-card h1, .sky-card h2 { margin: 0 0 20px; font-size: clamp(40px, 5.6vw, 82px); line-height: 1.0; font-weight: 700; letter-spacing: -.035em; text-wrap: balance; text-shadow: 0 2px 30px #0008; }
.sky-card em { font-style: normal; background: linear-gradient(100deg, var(--gold-2), var(--gold) 55%, #ff9a5c); -webkit-background-clip: text; background-clip: text; color: transparent; }
.sky-chapter[data-chapter="2"] em { background-image: linear-gradient(100deg, #c2d4ff, var(--blue)); }
.sky-chapter[data-chapter="3"] em { background-image: linear-gradient(100deg, var(--green), #b6ffd8 45%, var(--pink)); }
.sky-card p { margin: 0; max-width: 470px; font-size: clamp(16px, 1.35vw, 19px); line-height: 1.55; color: #ffffffc7; text-shadow: 0 1px 18px #000a; }
.sky-hint { margin: 0 !important; display: inline-flex; align-items: center; gap: 10px; font: 600 12px/1 -apple-system, system-ui, sans-serif !important; letter-spacing: .14em; text-transform: uppercase; color: #ffffff8c !important; }
.sky-hint span { display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; border: 1px solid #ffffff40; animation: sky-bob 2.2s ease-in-out infinite; }
@keyframes sky-bob { 50% { transform: translateY(5px); } }
.sky-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 22px; margin-top: 30px; }
.sky-button { display: inline-flex; align-items: center; gap: 10px; padding: 14px 22px; border-radius: 999px; font-weight: 650; font-size: 15px; text-decoration: none;
  color: #04120b; background: linear-gradient(100deg, var(--green), #b7ffd9); box-shadow: 0 10px 40px #6df0a840; }
.sky-button:hover { filter: brightness(1.06); }
.sky-link { color: #fff; font-weight: 600; font-size: 15px; text-decoration: none; }
.sky-link:hover { text-decoration: underline; }

/* Without WebGL or JavaScript: a still sky behind readable chapters. */
.sky-static .sky-hud, .sky-static .sky-track { display: none; }

@media (max-width: 1100px) { .sky-phone { display: none; } }
@media (max-width: 760px) {
  .sky-stage::before { background: linear-gradient(0deg, #05080df2 0%, #05080dcc 30%, transparent 62%), linear-gradient(180deg, #05080d99 0%, transparent 18%); }
  .sky-chapter { align-items: flex-end; padding: 0 20px 150px; }
  .sky-card h1, .sky-card h2 { font-size: clamp(34px, 10vw, 46px); margin-bottom: 14px; }
  .sky-card p { font-size: 15px; }
  .sky-eyebrow { margin-bottom: 12px; font-size: 11px; }
  .sky-bar { left: 16px; right: 16px; bottom: 16px; grid-template-columns: 1fr; gap: 10px; }
  .sky-skip { bottom: auto; top: 10px; right: 16px; padding: 10px 14px; font-size: 13px; }
  .sky-time { grid-auto-flow: column; justify-content: start; align-items: center; gap: 12px; }
  .sky-clock { font-size: 26px; }
  .sky-date { display: none; }
  .sky-steps a { padding: 0 0 8px; }
  .sky-steps a span { display: none; }
  .sky-track { grid-column: 1; margin-top: -6px; }
  .sky-top { top: 12px; left: 16px; right: 16px; }
  .sky-brand { display: none; }
  .sky-credit { top: auto; bottom: 4px; right: 16px; font-size: 9px; }
  .sky-readout { bottom: auto; top: 18%; }
  .sky-tape { top: 10%; width: 86vw; }
  .sky-reticle { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .sky-hint span { animation: none; }
  .sky-screen, .sky-phone { transition: none; }
}

/* The proof line under the story. */
.story-proof { display: grid; grid-template-columns: 1.1fr .65fr 1fr; gap: 35px; align-items: center; padding-top: 38px; padding-bottom: 38px; border-bottom: 1px solid var(--rule); margin-bottom: 60px; }
.story-proof p { font-size: 15px; margin: 0; line-height: 1.65; }
.story-proof p > span { display: block; font-size: 9px; letter-spacing: 1.2px; margin-bottom: 8px; color: var(--muted); }
.story-proof > div { padding-left: 30px; border-left: 1px solid var(--rule); }
.story-proof strong { font-size: 44px; font-weight: 500; line-height: 1; }
.story-proof strong small { font-size: 17px; font-weight: 400; }
.story-proof > div > span { display: block; font-size: 10px; color: var(--muted); margin-top: 8px; }
.story-proof .story-proof-note { font-size: 10px; color: var(--muted); }
@media (max-width: 760px) {
  .story-proof { grid-template-columns: 1fr .7fr; gap: 20px; padding: 28px 22px; margin-bottom: 35px; }
  .story-proof p { font-size: 13px; } .story-proof strong { font-size: 34px; } .story-proof > div { padding-left: 20px; }
  .story-proof .story-proof-note { grid-column: 1 / -1; font-size: 9px; }
}