/* Luno project site */

/* Colours are taken from the app's skybox (lib/props/skybox.dart) as the sun
   sets: the deep purples of twilight, the orange glow at the horizon, and the
   indigo of the night that follows. */

:root {
  --bg: #f6f4fa;
  --surface: #ffffff;
  --text: #1a0e3c;
  --muted: #5b5478;
  --border: #ddd8ea;
  --accent: #b9503b;
  --accent-text: #ffffff;
  --code-bg: #eeebf5;
  --glow: #e8622a;
  --warm: #ff9040;
  --dusk: #8a3e4c;
  --twilight: #2c1b6e;
  --sky-top: #1a0e3c;
  --sky-mid: #2c1b6e;
  --sky-horizon: #b9503b;
  --hero-text: #ffffff;
  --hero-muted: #e4dcf2;
  --logo-disc: #2d2874;
  --max: 64rem;
  --gutter: 1rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0f27;
    --surface: #160c3c;
    --text: #ece8f7;
    --muted: #a8a1c8;
    --border: #2c1b6e;
    --accent: #ff9040;
    --accent-text: #1a0e3c;
    --code-bg: #1a0e3c;
    --glow: #e8622a;
    --warm: #ff9040;
    --dusk: #b9503b;
    --twilight: #5b2d5d;
    --sky-top: #0d0f27;
    --sky-mid: #2c1b6e;
    --sky-horizon: #8a3e4c;
    --hero-text: #f4f0fb;
    --hero-muted: #cfc6e6;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 4rem; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 1rem/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

a { color: var(--accent); }

code, pre {
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 0.9em;
}
code { background: var(--code-bg); padding: 0.1em 0.3em; border-radius: 3px; }
pre {
  background: var(--code-bg);
  padding: 1rem;
  border-radius: 6px;
  overflow-x: auto;
}
pre code { background: none; padding: 0; }

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
/* The wordmark and the links share a baseline, whatever the two fonts' metrics */
.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1.5rem;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}
.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.6rem;
  color: var(--text);
  text-decoration: none;
  font-size: 1.15rem;
}
.brand .wordmark { font-weight: 300; letter-spacing: 0.3em; }

/* The app's logo: a crescent on a disc a shade darker than the sky behind it */
.logo { width: 1.75rem; height: 1.75rem; flex: none; align-self: center; }
.logo-disc { fill: var(--logo-disc); }
.logo-lit { fill: #fdfaf6; }

/* The lowercase, widely spaced wordmark from the app's logo */
.wordmark {
  font-family: "Montserrat", system-ui, sans-serif;
  font-weight: 200;
  text-transform: lowercase;
  letter-spacing: 0.45em;
}
.site-header nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; }
.site-header nav a { color: var(--muted); text-decoration: none; font-size: 0.95rem; }
.site-header nav a:hover { color: var(--text); }

/* Sections */

section { padding: 3rem 0; border-bottom: 1px solid var(--border); }
section:last-of-type { border-bottom: none; }

h1 { font-size: clamp(1.8rem, 5vw, 2.8rem); line-height: 1.15; margin: 0.25rem 0 1rem; }
h2 { font-size: 1.6rem; margin: 0 0 1rem; }
h3 { font-size: 1.15rem; margin: 2rem 0 0.75rem; }
h4 { font-size: 1rem; margin: 1.5rem 0 0.5rem; color: var(--muted); }

.eyebrow {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.lede { font-size: 1.15rem; color: var(--muted); max-width: 44rem; }

/* Hero: the app's sky with the sun 1.5° below the horizon, a few stars
   coming out, and three layers of hills as in the app's landscape */

.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(1px 1px at 12% 18%, rgba(255, 255, 255, 0.55), transparent),
    radial-gradient(1px 1px at 27% 8%, rgba(255, 255, 255, 0.4), transparent),
    radial-gradient(1px 1px at 41% 30%, rgba(255, 255, 255, 0.35), transparent),
    radial-gradient(1px 1px at 58% 12%, rgba(255, 255, 255, 0.5), transparent),
    radial-gradient(1px 1px at 73% 24%, rgba(255, 255, 255, 0.3), transparent),
    radial-gradient(1px 1px at 88% 6%, rgba(255, 255, 255, 0.45), transparent),
    radial-gradient(1px 1px at 94% 34%, rgba(255, 255, 255, 0.25), transparent),
    linear-gradient(180deg, var(--sky-top) 0%, var(--sky-mid) 50%, var(--sky-horizon) 100%);
  color: var(--hero-text);
  border-bottom: none;
  padding-bottom: 0;
}
.hero .eyebrow,
.hero .lede { color: var(--hero-muted); }
.hero h1.wordmark { font-size: clamp(2.6rem, 9vw, 4.25rem); margin: 0.5rem 0 0.25rem; }

/* Says the first letter is an L, which is easy to misread in the thin wordmark */
.pronunciation {
  margin: 0 0 1.25rem;
  color: var(--hero-text);
  opacity: 0.6;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}.hero .wrap { position: relative; z-index: 1; }
.hero .screenshot figcaption { color: var(--hero-muted); }
.hero .placeholder {
  border-color: rgba(255, 255, 255, 0.45);
  color: var(--hero-muted);
  background: rgba(0, 0, 0, 0.12);
}

.hero-grid { display: grid; gap: 1rem 3rem; align-items: center; }
@media (min-width: 52rem) {
  .hero-grid { grid-template-columns: minmax(0, 1fr) 19rem; }
}

/* The timeline toy: a working model of the app's main screen, in a phone */
.toy-figure { max-width: 19rem; }
.phone-frame {
  position: relative;
  padding: 0.45rem;
  border-radius: 2.4rem;
  background: #0b0918;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.12), 0 1.5rem 3rem rgba(5, 5, 16, 0.5);
}
/* Camera notch, hanging from the top of the frame, with its lens */
.phone-frame::before,
.phone-frame::after {
  content: "";
  position: absolute;
  left: 50%;
  pointer-events: none;
}
.phone-frame::before {
  top: 0.45rem;
  width: 36%;
  height: 1.35rem;
  transform: translateX(-50%);
  border-radius: 0 0 0.95rem 0.95rem;
  background: #0b0918;
}
.phone-frame::after {
  top: calc(0.45rem + 0.4rem);
  width: 0.5rem;
  height: 0.5rem;
  transform: translateX(1.6rem);
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #3b3a66, #12111f 60%);
}
.toy {
  display: block;
  width: 100%;
  aspect-ratio: 9 / 20;
  border-radius: 1.95rem;
  background: #0d0f27;
  touch-action: pan-y;
  cursor: grab;
}
.toy:active { cursor: grabbing; }
/* The demo plays by itself, so it leaves the pointer and page scrolling alone */
.toy-demo,
.toy-demo:active { cursor: default; touch-action: auto; }
.toy:focus-visible { outline: 2px solid var(--warm); outline-offset: 0.6rem; }
.toy-noscript { margin: 0.5rem 0 0; color: var(--hero-muted); font-size: 0.9rem; }
/* The frame is positioned for its notch, so the text below needs to be too,
   or the frame's shadow would be painted over it */
.toy-figure figcaption,
.toy-noscript { position: relative; }

.hills {
  display: block;
  width: 100%;
  height: 7rem;
  margin-top: -4.5rem;
}
.hill { stroke: none; }
.hill-back { fill: rgba(0, 0, 0, 0.12); }
.hill-mid { fill: rgba(0, 0, 0, 0.26); }
.hill-front {
  fill: rgba(0, 0, 0, 0.54);
  stroke: rgba(255, 255, 255, 0.18);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}

/* Buttons and the store links, which stay disabled until release */

.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 1.5rem 0 0.75rem; }
.button {
  display: inline-block;
  padding: 0.6rem 1rem;
  border-radius: 6px;
  background: var(--accent);
  color: var(--accent-text);
  text-decoration: none;
  font-weight: 600;
  border: 1px solid transparent;
}
.button.store {
  display: inline-flex;
  flex-direction: column;
  line-height: 1.2;
  padding: 0.5rem 1.1rem;
  background: var(--hero-text);
  color: var(--sky-top);
}
.button.store small {
  font-size: 0.72rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.button[aria-disabled="true"] {
  background: rgba(255, 255, 255, 0.08);
  color: var(--hero-muted);
  border: 1px dashed rgba(255, 255, 255, 0.45);
  cursor: not-allowed;
}

.status { margin: 0 0 1.5rem; color: var(--hero-muted); font-size: 0.95rem; }
.status::before {
  content: "";
  display: inline-block;
  width: 0.55em;
  height: 0.55em;
  margin-right: 0.5em;
  border-radius: 50%;
  background: var(--warm);
  vertical-align: 0.05em;
}

/* Cards */

.cards {
  list-style: none;
  counter-reset: card;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: 1rem;
}
.cards li {
  counter-increment: card;
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: 3px solid var(--warm);
  border-radius: 8px;
  padding: 1rem;
}
/* Top borders darken left to right, like the sky after sunset */
.cards li:nth-child(2) { border-top-color: var(--glow); }
.cards li:nth-child(3) { border-top-color: var(--dusk); }
.cards li:nth-child(4) { border-top-color: var(--twilight); }
.cards li strong { display: block; margin-bottom: 0.25rem; }
.cards li strong::before { content: counter(card) ". "; color: var(--muted); }

/* Key facts */

.facts {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.4rem 1.5rem;
}
.facts dt { font-weight: 600; }
.facts dd { margin: 0; color: var(--muted); }

@media (max-width: 30rem) {
  .facts { grid-template-columns: 1fr; }
  .facts dd { margin-bottom: 0.5rem; }
}

/* Tables */

.table-scroll { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; background: var(--surface); }
th, td { text-align: left; padding: 0.5rem 0.75rem; border: 1px solid var(--border); vertical-align: top; }
th { background: var(--code-bg); }

/* Formulas */

.formula { margin: 0.75rem 0 1rem; }
.formula code { font-size: 0.95em; line-height: 1.7; }

/* Screenshots and videos: portrait phone captures */

.screenshot { margin: 1.5rem 0; }
.screenshot img,
.screenshot video {
  display: block;
  width: 100%;
  max-width: 1024px;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
}
.screenshot figcaption { margin-top: 0.5rem; color: var(--muted); font-size: 0.9rem; }

.phone { max-width: 17rem; margin-left: auto; margin-right: auto; }
.phone img,
.phone video { border-radius: 1.25rem; }

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: 0 1.5rem;
}
.gallery .phone { margin: 1.5rem 0; max-width: none; }

/* Embedded YouTube video, 16:9 */
.video { margin: 1.5rem 0; max-width: 48rem; }
.video-frame {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #050510;
}
.video-frame iframe { display: block; width: 100%; height: 100%; border: 0; }
.video figcaption { margin-top: 0.5rem; color: var(--muted); font-size: 0.9rem; }

/* Text and a portrait figure side by side on wide screens */
.media-layout { display: grid; gap: 0 2.5rem; align-items: start; }
.media-layout .phone { margin-top: 0; }
@media (min-width: 52rem) {
  .media-layout { grid-template-columns: minmax(0, 1fr) 17rem; }
}

/* Diagrams: inline SVG, coloured from the theme tokens */

.diagram { margin: 1.5rem 0; }
.diagram-scroll { overflow-x: auto; }
.diagram svg { display: block; width: 100%; min-width: 720px; height: auto; }
.diagram figcaption { margin-top: 0.5rem; color: var(--muted); font-size: 0.9rem; }

.diagram text { fill: var(--text); font-size: 13px; }
.diagram .d-title { font-size: 15px; font-weight: 700; }
.diagram .d-head { font-size: 14px; font-weight: 600; }
.diagram .d-small { font-size: 12px; }
.diagram .d-muted { fill: var(--muted); font-weight: 400; }
.diagram .d-mono { font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace; }

.diagram .d-zone { fill: none; stroke: var(--muted); stroke-width: 1; stroke-dasharray: 6 4; }
.diagram .d-box { fill: var(--surface); stroke: var(--border); stroke-width: 1.5; }
.diagram .d-box-accent { stroke: var(--accent); }
.diagram .d-flow { stroke: var(--accent); stroke-width: 2; fill: none; }
.diagram .d-arrowhead { fill: var(--accent); }
.diagram .d-bracket { stroke: var(--muted); stroke-width: 1.5; fill: none; }

/* The moon is drawn as in the app: a dim disc with a white lit part, on the night sky */
.diagram .d-night { fill: #0d0f27; stroke: var(--border); stroke-width: 1; }
.diagram .d-moon-dark { fill: rgba(255, 255, 255, 0.1); }
.diagram .d-moon-lit { fill: #ffffff; }

/* Stand-ins for screenshots and videos still to be added */

.placeholder {
  margin: 0;
  aspect-ratio: 9 / 19.5;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 0.5rem;
  border: 2px dashed var(--border);
  border-radius: 1.25rem;
  color: var(--muted);
  font-size: 0.95rem;
  text-align: center;
  padding: 1rem;
}
.placeholder code { background: none; padding: 0; font-size: 0.8rem; word-break: break-all; }

/* Footer */

.site-footer { padding: 2rem 0; color: var(--muted); font-size: 0.9rem; }