/* Inter (SIL Open Font License), for systems without San Francisco. */
@font-face {
  font-family: 'Inter Variable';
  font-style: normal;
  font-display: swap;
  font-weight: 100 900;
  src: url(assets/fonts/inter-latin-ext-opsz-normal.woff2) format('woff2-variations');
  unicode-range:
    U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F,
    U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: 'Inter Variable';
  font-style: normal;
  font-display: swap;
  font-weight: 100 900;
  src: url(assets/fonts/inter-latin-opsz-normal.woff2) format('woff2-variations');
  unicode-range:
    U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC,
    U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* Source Serif 4 (SIL Open Font License), for headings. */
@font-face {
  font-family: 'Source Serif 4 Variable';
  font-style: normal;
  font-display: swap;
  font-weight: 200 900;
  src: url(assets/fonts/source-serif-4-latin-ext-opsz-normal.woff2) format('woff2-variations');
  unicode-range:
    U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F,
    U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: 'Source Serif 4 Variable';
  font-style: normal;
  font-display: swap;
  font-weight: 200 900;
  src: url(assets/fonts/source-serif-4-latin-opsz-normal.woff2) format('woff2-variations');
  unicode-range:
    U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC,
    U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  /* The same warm paper and logo teal as the app. */
  --bg: #faf9f5;
  --bg-soft: #f2f0e9;
  --text: #2e2c27;
  --muted: #6e6a5f;
  --border: #e5e2d9;
  --accent: #4c6f77;
  --accent-text: #ffffff;
  --accent-soft: #e3ebec;
  --code-bg: #f0eee6;
  --shadow: 0 12px 40px rgba(60, 45, 20, 0.12);
  --font-serif: 'Source Serif 4 Variable', 'Iowan Old Style', Georgia, serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #262624;
    --bg-soft: #1f1e1c;
    --text: #e9e6dd;
    --muted: #a7a398;
    --border: #3d3c38;
    --accent: #9dbcc2;
    --accent-text: #1a1d1d;
    --accent-soft: #33403f;
    --code-bg: #2d2c29;
    --shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
    color-scheme: dark;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font:
    17px/1.6 'Inter Variable',
    -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    Roboto,
    sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

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

code,
pre {
  font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  font-size: 0.88em;
}

code {
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

pre {
  background: var(--code-bg);
  padding: 14px 16px;
  border-radius: 8px;
  overflow-x: auto;
  line-height: 1.5;
}

pre code {
  background: none;
  padding: 0;
}

h1,
h2,
h3 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 16px;
}

.muted {
  color: var(--muted);
}

.small {
  font-size: 0.88em;
}

/* Header and footer */

.site-header {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(8px);
  z-index: 10;
}

.site-header nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 60px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.1em;
  color: var(--text);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 20px;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95em;
}

.nav-links a:hover {
  color: var(--text);
}

.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 80px;
  padding: 24px 0 40px;
  color: var(--muted);
  font-size: 0.9em;
}

/* Buttons */

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 24px 0 12px;
}

.button {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 8px;
  border: 1px solid var(--border);
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95em;
}

.button:hover {
  border-color: var(--accent);
}

.button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
}

.button.primary:hover {
  filter: brightness(1.08);
}

/* Home */

.hero {
  background: linear-gradient(180deg, var(--accent-soft), var(--bg));
  padding: 64px 0 48px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1.25fr;
  gap: 48px;
  align-items: center;
}

.eyebrow {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.9em;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 0 0 8px;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 2.9rem);
  margin: 0 0 16px;
  letter-spacing: -0.02em;
}

.lede {
  font-size: 1.15em;
  color: var(--muted);
}

/* Diagrams: SVG files with their own light and dark colours. On narrow screens they scroll sideways
   rather than shrink until the text can't be read. */
.diagram {
  margin: 0;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg);
  overflow-x: auto;
}

.hero .diagram {
  box-shadow: var(--shadow);
}

.diagram img {
  display: block;
  width: 100%;
  height: auto;
}

.showcase-wide {
  padding: 48px 0 16px;
}

.showcase-wide h2 {
  margin-top: 0;
}

.showcase-wide > div {
  max-width: 760px;
}

.showcase-wide > p,
.showcase-wide > div > p {
  max-width: 760px;
  color: var(--muted);
}

.showcase-wide .diagram {
  margin-top: 20px;
}

/* Smaller diagrams stay at their drawn size rather than stretch across the page. */
.showcase-wide .diagram.fit {
  max-width: 960px;
}

.features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  padding-top: 56px;
  padding-bottom: 24px;
}

.feature h3 {
  margin: 0 0 8px;
  font-size: 1.05em;
}

.feature p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95em;
}

.showcase-row {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 48px;
  align-items: center;
  padding: 48px 0;
}

.showcase-row.reverse {
  grid-template-columns: 1.4fr 1fr;
}

.showcase-row.reverse > :first-child {
  order: 2;
}

.showcase-row h2 {
  margin-top: 0;
}

.roadmap {
  padding-top: 32px;
}

.roadmap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.roadmap-grid > div {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
}

.roadmap-grid h3 {
  margin: 0 0 8px;
  font-size: 1em;
}

.roadmap-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95em;
}

/* Content pages: download, FAQ and docs */

.page {
  max-width: 780px;
  padding-top: 40px;
}

.page h1 {
  font-size: 2.2rem;
  letter-spacing: -0.02em;
}

.page h2 {
  margin-top: 2em;
}

.faq h3 {
  font-size: 1.05em;
  margin-bottom: 4px;
}

.faq h3 + p {
  margin-top: 0;
}

.download-box {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px 24px;
}

.release-name {
  margin: 0;
}

.badge {
  display: inline-block;
  margin-left: 8px;
  padding: 1px 8px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.8em;
  font-weight: 600;
}

table {
  border-collapse: collapse;
  width: 100%;
  margin: 16px 0;
  font-size: 0.95em;
}

th,
td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

td.num {
  text-align: right;
  white-space: nowrap;
}

table.files td:nth-child(2) {
  overflow-wrap: anywhere;
}

.doc-list {
  list-style: none;
  padding: 0;
}

.doc-list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

.doc-list a {
  font-weight: 600;
}

.doc-list p {
  margin: 4px 0 0;
  color: var(--muted);
}

.doc-source {
  margin-top: 48px;
  font-size: 0.88em;
  color: var(--muted);
}

/* Phones */

@media (max-width: 860px) {
  .hero-grid,
  .showcase-row,
  .showcase-row.reverse,
  .roadmap-grid {
    grid-template-columns: 1fr;
  }

  .showcase-row.reverse > :first-child {
    order: 0;
  }

  .features {
    grid-template-columns: 1fr 1fr;
  }

  .hero {
    padding-top: 40px;
  }
}

@media (max-width: 560px) {
  .features {
    grid-template-columns: 1fr;
  }

  .diagram img {
    min-width: 560px;
  }

  .showcase-wide .diagram img {
    min-width: 820px;
  }

  .nav-links {
    gap: 14px;
  }

  .nav-links a:last-child {
    display: none;
  }

  table.files td:nth-child(2) {
    display: none;
  }
}