/* Radix 83 website. Colors come from the Slate theme in CalcTheme.kt. */

@font-face {
  font-family: "Barlow Semi Condensed";
  src: url("fonts/barlow_semi_condensed_medium.ttf") format("truetype");
  font-weight: 500;
  font-display: swap;
}
@font-face {
  font-family: "Barlow Semi Condensed";
  src: url("fonts/barlow_semi_condensed_semibold.ttf") format("truetype");
  font-weight: 600;
  font-display: swap;
}
@font-face {
  font-family: "Barlow Semi Condensed";
  src: url("fonts/barlow_semi_condensed_bold.ttf") format("truetype");
  font-weight: 700;
  font-display: swap;
}

:root {
  color-scheme: dark;
  --bg: #111316;
  --bg-raised: #1b1e23;
  --bg-top: #2a3140;
  --line: #2c3139;
  --text: #e6e9ee;
  --text-dim: #9aa2af;
  --accent: #5b8bea;
  --accent-strong: #4a90e2;
  --second: #ffa24c;
  --alpha: #35d29e;
  --lcd: #cfeab4;
  --lcd-ink: #14240f;
  --brand: "Barlow Semi Condensed", "Arial Narrow", system-ui, sans-serif;
  --body: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --gutter: 16px;
  --max: 1080px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 var(--body);
}

a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: #8fb2f5; }

img { display: block; max-width: 100%; height: auto; }

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

/* Header */

.site-header {
  position: relative;
  z-index: 1;
  padding: 20px 0;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font: 700 20px/1 var(--brand);
  letter-spacing: 0.32em;
}
.logo:hover { color: var(--text); }
.logo svg { width: 28px; height: 22px; flex: none; }
.logo .num { letter-spacing: 0.05em; font-style: italic; }
.site-nav { display: flex; gap: 20px; font: 600 16px/1 var(--brand); letter-spacing: 0.06em; }
.site-nav a { color: var(--text-dim); text-decoration: none; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--text); }

/* Hero */

.hero {
  position: relative;
  overflow: hidden;
  margin-top: -64px;
  padding: 96px 0 72px;
  background:
    radial-gradient(ellipse 80% 70% at 75% 10%, rgba(91, 139, 234, 0.22), transparent 70%),
    linear-gradient(180deg, var(--bg-top), var(--bg) 85%);
}
.hero .wrap {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 48px;
}
.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font: 600 15px/1.2 var(--brand);
  letter-spacing: 0.3em;
  text-transform: uppercase;
}
.hero h1 {
  margin: 0;
  font: 700 clamp(40px, 6vw, 64px)/1.02 var(--brand);
  letter-spacing: -0.01em;
  text-wrap: balance;
}
.hero .lead {
  margin: 20px 0 32px;
  max-width: 34em;
  color: var(--text-dim);
  font-size: 19px;
}
.cta-row { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; }
.button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--accent), #26489a);
  color: #fff;
  font: 700 18px/1 var(--brand);
  letter-spacing: 0.02em;
  text-decoration: none;
  box-shadow: 0 6px 0 #1b3577, 0 10px 24px rgba(0, 0, 0, 0.4);
  transition: transform 0.12s, box-shadow 0.12s;
}
.button:hover { color: #fff; transform: translateY(-1px); }
.button:active { transform: translateY(4px); box-shadow: 0 2px 0 #1b3577, 0 4px 10px rgba(0, 0, 0, 0.4); }
.button svg { width: 18px; height: 18px; }
.cta-note { color: var(--text-dim); font-size: 15px; }

.devices {
  position: relative;
  justify-self: center;
  width: min(100%, 340px);
  aspect-ratio: 320 / 652;
}
.device {
  position: absolute;
  width: 100%;
  border-radius: 28px;
  padding: 8px;
  background: linear-gradient(160deg, #3a3f48, #121417);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.55), inset 0 0 0 1px rgba(255, 255, 255, 0.06);
}
.device img { border-radius: 21px; width: 100%; }
.device.front { top: 0; left: 0; z-index: 1; }
.device.back {
  top: 6%;
  left: 38%;
  transform: rotate(4deg);
  filter: brightness(0.75);
}

/* Sections */

section { padding: 72px 0; }
section h2 {
  margin: 0 0 8px;
  font: 700 clamp(30px, 4vw, 40px)/1.1 var(--brand);
}
.section-intro { margin: 0 0 32px; color: var(--text-dim); max-width: 40em; }

.gallery {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(220px, 1fr);
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 12px;
  scrollbar-color: var(--line) transparent;
}
.gallery figure { margin: 0; scroll-snap-align: start; }
.gallery img { border-radius: 14px; border: 1px solid var(--line); }

.features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.feature {
  padding: 24px;
  border-radius: 18px;
  background: var(--bg-raised);
  border: 1px solid var(--line);
}
.feature h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
  font: 700 22px/1.2 var(--brand);
}
.feature h3::before {
  content: "";
  width: 22px;
  height: 10px;
  border-radius: 5px;
  background: var(--key, var(--accent));
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.45);
}
.feature ul { margin: 0; padding-left: 1.1em; color: var(--text-dim); }
.feature li + li { margin-top: 4px; }

.privacy-callout {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px 32px;
  padding: 28px;
  border-radius: 18px;
  background: var(--lcd);
  color: var(--lcd-ink);
  box-shadow: inset 0 0 0 6px #0c0d0f, inset 0 0 40px rgba(20, 36, 15, 0.25);
}
.privacy-callout h2 { margin: 0 0 4px; font-size: 28px; }
.privacy-callout p { margin: 0; max-width: 36em; }
.privacy-callout a { color: var(--lcd-ink); font-weight: 600; }

/* Long-form text (privacy policy) */

.doc {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px var(--gutter) 72px;
}
.doc h1 {
  margin: 16px 0 4px;
  font: 700 clamp(36px, 6vw, 48px)/1.1 var(--brand);
}
.doc .updated { margin: 0 0 32px; color: var(--text-dim); }
.doc h2 {
  margin: 40px 0 8px;
  font: 700 26px/1.2 var(--brand);
}
.doc p, .doc li { color: #cdd2da; }
.doc ul { padding-left: 1.2em; }
.doc li + li { margin-top: 6px; }
.doc .summary {
  padding: 20px 24px;
  border-radius: 14px;
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-left: 4px solid var(--alpha);
}
.doc .summary p { margin: 0; color: var(--text); }

/* Footer */

.site-footer {
  padding: 32px 0 48px;
  border-top: 1px solid var(--line);
  color: var(--text-dim);
  font-size: 14px;
}
.site-footer .wrap { display: grid; gap: 8px; }
.site-footer p { margin: 0; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-bottom: 8px; }
.site-footer nav a { color: var(--text); text-decoration: none; font-weight: 600; }
.site-footer nav a:hover { color: var(--accent); }

/* Phone width */

@media (max-width: 760px) {
  body { font-size: 16px; }
  .hero { padding: 88px 0 48px; }
  .hero .wrap { grid-template-columns: 1fr; gap: 40px; }
  .eyebrow { font-size: 13px; letter-spacing: 0.18em; }
  .devices { width: min(78%, 300px); justify-self: start; margin-left: 4%; }
  .features { grid-template-columns: 1fr; }
  section { padding: 48px 0; }
  .gallery { grid-auto-columns: 62%; margin-right: calc(-1 * var(--gutter)); padding-right: var(--gutter); }
  .privacy-callout { padding: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  .button { transition: none; }
}