/* HypeDE site.
   Layout: a single reading column over the Horizon wallpaper, with the site's
   own navigation docked as a HypeDE shelf at the bottom of the window. */
:root {
  --sky: #eef3fb;          /* page ground, the pale top of the Horizon wallpaper */
  --surface: #ffffff;      /* cards and shelf bubbles */
  --ink: #16202e;          /* body text, blue-biased near-black */
  --muted: #53607a;        /* secondary text */
  --line: #d6dfee;         /* hairlines */
  --accent: #0b57d0;       /* Chrome OS–style tonal blue */
  --accent-soft: #d3e3fd;  /* selected pills, code chips */
  --on-accent-soft: #041e49;
  --shelf: rgba(242, 245, 250, 0.86);
  --shadow: 0 1px 2px rgba(22, 32, 46, 0.06), 0 8px 28px rgba(22, 32, 46, 0.10);

  --font-display: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --font-body: "Figtree", "Segoe UI", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", monospace;

  --step-0: 1.0625rem;
  --step-1: 1.3rem;
  --step-2: 1.75rem;
  --step-3: clamp(2.2rem, 4.8vw, 3.6rem);
  --radius: 20px;
  --shelf-height: 60px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --sky: #0f1726; --surface: #1b2436; --ink: #e6ecf6; --muted: #a3b0c7;
    --line: #2c3850; --accent: #a8c7fa; --accent-soft: #0b3a82; --on-accent-soft: #d3e3fd;
    --shelf: rgba(18, 24, 36, 0.84);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 10px 30px rgba(0, 0, 0, 0.35);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --sky: #0f1726; --surface: #1b2436; --ink: #e6ecf6; --muted: #a3b0c7;
  --line: #2c3850; --accent: #a8c7fa; --accent-soft: #0b3a82; --on-accent-soft: #d3e3fd;
  --shelf: rgba(18, 24, 36, 0.84);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 10px 30px rgba(0, 0, 0, 0.35);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; overflow-x: clip; }
body {
  margin: 0;
  background: var(--sky);
  color: var(--ink);
  font: 400 var(--step-0)/1.6 var(--font-body);
  padding-inline: 16px;
  padding-block: 0 calc(var(--shelf-height) + 32px + env(safe-area-inset-bottom, 0px));
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-underline-offset: 3px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.12; text-wrap: balance; margin: 0; }
h1 { font-size: var(--step-3); font-weight: 700; letter-spacing: -0.02em; }
h2 { font-size: var(--step-2); font-weight: 650; letter-spacing: -0.01em; }
h3 { font-size: var(--step-1); font-weight: 600; }
p { margin: 0; }
code, pre { font-family: var(--font-mono); font-size: 0.88em; }
:not(pre) > code { background: var(--accent-soft); color: var(--on-accent-soft); padding: 0.1em 0.4em; border-radius: 6px; }

.page { max-width: 1080px; margin-inline: auto; display: grid; grid-template-columns: minmax(0, 1fr); gap: 96px; }

/* ---------- hero ---------- */
.hero {
  position: relative;
  padding-block: 72px 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  justify-items: start;
}
.hero > * { max-width: 100%; min-width: 0; }
.hero::before {
  /* the Horizon wallpaper as a soft backdrop behind the heading */
  content: "";
  position: absolute;
  top: 0;
  left: calc(50% - 50vw);
  width: 100vw;
  height: 560px;
  background: url("img/horizon-light.svg") center bottom / cover no-repeat;
  opacity: 0.55;
  z-index: -1;
  mask-image: linear-gradient(to bottom, transparent, #000 30%, #000 60%, transparent);
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .hero::before { background-image: url("img/horizon-dark.svg"); } }
:root[data-theme="dark"] .hero::before { background-image: url("img/horizon-dark.svg"); }

.brand { display: flex; align-items: center; gap: 12px; font: 650 1.1rem var(--font-display); }
.brand img { width: 36px; height: 36px; }
.lang { margin-left: 8px; font: 500 0.9rem var(--font-body); }
.hero h1 { max-width: 18ch; }
.lede { max-width: 58ch; font-size: 1.2rem; color: var(--muted); }
.lede strong { color: var(--ink); font-weight: 600; }

.install {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  background: var(--surface); border: 1px solid var(--line); border-radius: 999px;
  padding: 8px 8px 8px 20px; box-shadow: var(--shadow); max-width: 100%;
}
.install code { background: none; color: var(--ink); padding: 0; font-size: 0.92rem; overflow-wrap: anywhere; }
.install .prompt { color: var(--muted); user-select: none; }
button, .button {
  font: 600 0.95rem var(--font-body); cursor: pointer; border: 0; border-radius: 999px;
  padding: 10px 18px; background: var(--accent); color: var(--surface); text-decoration: none;
}
.button.quiet { background: var(--accent-soft); color: var(--on-accent-soft); }
.actions { display: flex; gap: 12px; flex-wrap: wrap; }

.screen {
  width: 100%;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
  background: var(--surface);
}
.screen img { width: 100%; }
figure { margin: 0; display: grid; gap: 10px; }
figcaption { color: var(--muted); font-size: 0.92rem; }

/* ---------- parts ---------- */
.section-head { display: grid; gap: 12px; max-width: 64ch; margin-bottom: 32px; }
.eyebrow { font: 600 0.8rem var(--font-body); letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); }
.part {
  display: grid; gap: 28px; align-items: center;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  padding-block: 28px;
  border-top: 1px solid var(--line);
}
.part:nth-of-type(even) { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.part:nth-of-type(even) .part-text { order: 2; }
.part-text { display: grid; gap: 14px; min-width: 0; }
.part-text ul { margin: 0; padding-left: 1.2em; display: grid; gap: 6px; color: var(--muted); }
.part-text li strong { color: var(--ink); font-weight: 600; }
.stack { font: 500 0.85rem var(--font-mono); color: var(--muted); }

/* ---------- how ---------- */
.how { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; }
.how article { background: var(--surface); border-radius: var(--radius); padding: 24px; display: grid; gap: 10px; align-content: start; border: 1px solid var(--line); }
.how p { color: var(--muted); }
pre.tree {
  margin: 24px 0 0; padding: 20px; overflow-x: auto; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--line); line-height: 1.7;
}

/* ---------- install ---------- */
.steps { display: grid; gap: 18px; counter-reset: step; }
.step { display: grid; grid-template-columns: 40px minmax(0, 1fr); gap: 16px; }
.step::before {
  counter-increment: step; content: counter(step);
  width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center;
  background: var(--accent-soft); color: var(--on-accent-soft); font: 700 1rem var(--font-display);
}
.step div { display: grid; gap: 8px; min-width: 0; }
.step p { color: var(--muted); }
.code {
  position: relative; margin: 0; padding: 16px 18px; overflow-x: auto;
  background: var(--surface); border: 1px solid var(--line); border-radius: 14px; line-height: 1.6;
}
.code button { position: absolute; top: 8px; right: 8px; padding: 6px 12px; font-size: 0.8rem; background: var(--accent-soft); color: var(--on-accent-soft); }

.limits { display: grid; gap: 12px; max-width: 70ch; color: var(--muted); padding-left: 1.2em; margin: 0; }

footer { color: var(--muted); font-size: 0.92rem; display: flex; gap: 12px 24px; flex-wrap: wrap; border-top: 1px solid var(--line); padding-top: 24px; }

/* ---------- the shelf (site navigation) ---------- */
.shelf {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 10;
  height: calc(var(--shelf-height) + env(safe-area-inset-bottom, 0px));
  padding: 8px 12px calc(8px + env(safe-area-inset-bottom, 0px));
  display: flex; align-items: center; gap: 8px;
  background: var(--shelf);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  border-top: 1px solid var(--line);
}
.ring {
  width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center;
  background: transparent; padding: 0; flex: none;
}
.ring::after { content: ""; width: 14px; height: 14px; border-radius: 50%; border: 2px solid var(--ink); }
.ring:hover, .ring[aria-expanded="true"] { background: var(--line); }
.shelf-apps { flex: 1; display: flex; justify-content: center; gap: 4px; min-width: 0; overflow-x: auto; scrollbar-width: none; }
.shelf-apps a {
  display: flex; align-items: center; gap: 8px; height: 44px; padding: 0 14px; border-radius: 999px;
  color: var(--ink); text-decoration: none; font-weight: 500; font-size: 0.95rem; white-space: nowrap;
}
.shelf-apps a:hover { background: var(--line); }
.shelf-apps a[aria-current="true"] { background: var(--accent-soft); color: var(--on-accent-soft); }
.tray {
  flex: none; display: flex; align-items: center; gap: 10px; height: 40px; padding: 0 14px;
  border-radius: 999px; background: var(--line); font: 600 0.92rem var(--font-body);
  font-variant-numeric: tabular-nums;
}
.tray svg { width: 16px; height: 16px; fill: var(--ink); }

/* launcher bubble opened by the ring */
.bubble {
  position: fixed; left: 12px; bottom: calc(var(--shelf-height) + 10px + env(safe-area-inset-bottom, 0px));
  width: min(420px, calc(100vw - 24px)); z-index: 11;
  background: var(--surface); border-radius: 24px; box-shadow: var(--shadow); border: 1px solid var(--line);
  padding: 16px; display: grid; gap: 12px;
}
.bubble label { font: 600 0.8rem var(--font-body); color: var(--muted); letter-spacing: 0.06em; text-transform: uppercase; }
.bubble input {
  width: 100%; font: 500 1rem var(--font-body); padding: 12px 18px; border-radius: 999px;
  border: 2px solid var(--accent); background: var(--sky); color: var(--ink);
}
.bubble ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.bubble a { display: block; padding: 10px 14px; border-radius: 12px; color: var(--ink); text-decoration: none; }
.bubble a:hover, .bubble a:focus-visible { background: var(--accent-soft); color: var(--on-accent-soft); }
.bubble .calc { font: 600 1.1rem var(--font-mono); padding: 10px 14px; border-radius: 12px; background: var(--accent-soft); color: var(--on-accent-soft); }

@media (max-width: 760px) {
  .page { gap: 64px; }
  .hero { padding-block: 40px 0; }
  .part, .part:nth-of-type(even) { grid-template-columns: minmax(0, 1fr); }
  .part:nth-of-type(even) .part-text { order: 0; }
  .shelf-apps a span { display: none; }
  .shelf-apps a { padding: 0 12px; }
  .tray .date { display: none; }
  .install { border-radius: 20px; padding: 14px 16px; }
}
/* ---------- motion ----------
   Everything below is decoration: the page is complete without it, and
   prefers-reduced-motion switches it off. Scroll reveals only apply once
   site.js has marked the page with .motion, and never to what is already
   on screen at load. */

@keyframes rise-in {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: none; }
}
@keyframes drift {
  from { background-position: 0% 100%; }
  to { background-position: 100% 100%; }
}
@keyframes tilt-in {
  from { opacity: 0; transform: perspective(1400px) rotateX(14deg) translateY(40px) scale(0.96); }
  to { opacity: 1; transform: perspective(1400px) rotateX(0) translateY(0) scale(1); }
}
@keyframes shelf-in {
  from { transform: translateY(100%); }
  to { transform: none; }
}
@keyframes bubble-in {
  from { opacity: 0; transform: translateY(14px) scale(0.94); }
  to { opacity: 1; transform: none; }
}
@keyframes ring-hint {
  0%, 100% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 45%, transparent); }
  50% { box-shadow: 0 0 0 10px transparent; }
}
@keyframes wave {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

@media (prefers-reduced-motion: no-preference) {
  /* the wallpaper drifts sideways inside its box, so nothing leaves the viewport */
  .hero::before { background-size: calc(100% + 160px) auto; animation: drift 18s ease-in-out infinite alternate; }
  .hero > * { animation: rise-in 700ms cubic-bezier(0.2, 0.8, 0.2, 1) both; }
  .hero > :nth-child(2) { animation-delay: 80ms; }
  .hero > :nth-child(3) { animation-delay: 160ms; }
  .hero > :nth-child(4) { animation-delay: 240ms; }
  .hero > :nth-child(5) { animation-delay: 320ms; }
  /* backwards, not both: once finished, the hover lift must win */
  .hero > .screen { animation: tilt-in 1100ms cubic-bezier(0.2, 0.8, 0.2, 1) 380ms backwards; }

  .shelf { animation: shelf-in 600ms cubic-bezier(0.2, 0.8, 0.2, 1) 200ms both; }
  .ring { animation: ring-hint 1.6s ease-out 1.2s 2; }
  .bubble:not([hidden]) { animation: bubble-in 260ms cubic-bezier(0.2, 0.9, 0.3, 1.2) both; transform-origin: 0 100%; }

  .screen, .how article, .gallery figure {
    transition: transform 320ms cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 320ms;
  }
  .screen:hover, .how article:hover, .gallery figure:hover {
    transform: translateY(-4px);
    box-shadow: 0 2px 4px rgba(22, 32, 46, 0.08), 0 18px 40px rgba(22, 32, 46, 0.16);
  }
  .shelf-apps a, .ring, button, .button { transition: background-color 160ms, transform 160ms; }
  .shelf-apps a:active, .ring:active, button:active, .button:active { transform: scale(0.95); }

  /* Scroll reveal: .reveal elements rise into place as they come into view. */
  .motion .reveal { opacity: 0; transform: translateY(28px); transition: opacity 700ms, transform 800ms cubic-bezier(0.2, 0.8, 0.2, 1); }
  .motion .reveal.in { opacity: 1; transform: none; }
  .motion .reveal.in:nth-child(2) { transition-delay: 90ms; }
  .motion .reveal.in:nth-child(3) { transition-delay: 180ms; }
  .motion .reveal.in:nth-child(4) { transition-delay: 270ms; }

  /* Lock screen preview: the colour waves roll across its top edge. */
  .waves { animation: wave 9s linear infinite; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

/* ---------- lock screen and customisation sections ---------- */
.wave-band {
  position: relative; height: 90px; overflow: hidden; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--line);
}
.waves { position: absolute; inset: 0 auto 0 0; width: 200%; height: 100%; }
.gallery { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.gallery figure { border-radius: 14px; }
.gallery figcaption { padding-inline: 4px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; }
.chips li {
  padding: 6px 14px; border-radius: 999px; background: var(--accent-soft); color: var(--on-accent-soft);
  font-weight: 500; font-size: 0.92rem;
}
.support { color: #ff5e5b; font-weight: 600; }

kbd { font: 500 0.82em var(--font-mono); padding: 1px 6px; border-radius: 6px; background: var(--accent-soft); color: var(--on-accent-soft); }
.features article { display: grid; gap: 8px; align-content: start; }
@media (prefers-reduced-motion: no-preference) {
  .how article { transition: transform 320ms cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 320ms; }
  .how article:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
  .motion .chips li.reveal { transform: scale(0.92) translateY(10px); }
  .motion .chips li.reveal.in { transform: none; }
}