/* Postio landing page.
 *
 * Tokens copied by hand from crates/postio-gtk/data/tokens.css (generated
 * from the Industry design system) rather than shared at build time: the
 * site has no build step (ADR 0011 Q1/Q6 and issue #24's own acceptance
 * criterion — "loads as a static page, no build step required"), and the
 * app's token pipeline emits GTK CSS, not web CSS. If the palette or type
 * scale changes there, it needs a deliberate update here too. Font files
 * are the same .ttf's the app embeds, copied under site/assets/fonts/ with
 * their OFL licence — no Google Fonts, no CDN (ADR 0011 Q5: no third party
 * ever sees a visitor's IP because this page loaded).
 */

@font-face {
  font-family: "Barlow";
  src: url("../fonts/barlow/Barlow-Regular.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Barlow";
  src: url("../fonts/barlow/Barlow-Italic.ttf") format("truetype");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: "Barlow";
  src: url("../fonts/barlow/Barlow-Medium.ttf") format("truetype");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Barlow";
  src: url("../fonts/barlow/Barlow-Bold.ttf") format("truetype");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Barlow Condensed";
  src: url("../fonts/barlow-condensed/BarlowCondensed-Regular.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Barlow Condensed";
  src: url("../fonts/barlow-condensed/BarlowCondensed-SemiBold.ttf") format("truetype");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("../fonts/ibm-plex-mono/IBMPlexMono-Regular.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("../fonts/ibm-plex-mono/IBMPlexMono-Medium.ttf") format("truetype");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

/* ── Tokens — light (default) ────────────────────────────────────── */
:root {
  --color-bg: #f2f2f3;
  --color-surface: #e9e9ea;
  --color-surface-raised: #ffffff;
  --color-text: #1d1f20;
  --color-text-secondary: rgba(29, 31, 32, 0.8);
  --color-dim: rgba(29, 31, 32, 0.55);
  --color-faint: rgba(29, 31, 32, 0.45);
  --color-accent: #5980a6;
  --color-accent-hover: #597ea3;
  --color-accent-active: #416180;
  --color-accent-text: #416180;
  --color-accent-100: #eef6ff;
  --color-accent-200: #d6ebff;
  --hairline: rgba(29, 31, 32, 0.16);
  --hairline-strong: #b7b7ba;
  --shadow-md: 0 3px 10px rgba(43, 43, 45, 0.16);
  --shadow-lg: 0 12px 32px rgba(43, 43, 45, 0.22);

  --font-heading: "Barlow Condensed", sans-serif;
  --font-body: "Barlow", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 7px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg: #2b2b2d;
    --color-surface: #424244;
    --color-surface-raised: #353537;
    --color-text: #f5f5f8;
    --color-text-secondary: #e7e7ea;
    --color-dim: #b7b7ba;
    --color-faint: #98989b;
    --color-accent: #94bce3;
    --color-accent-hover: #b5d9fd;
    --color-accent-active: #749dc4;
    --color-accent-text: #b5d9fd;
    --color-accent-100: #1d2d3d;
    --color-accent-200: #2c455d;
    --hairline: #5d5d60;
    --hairline-strong: #7a7a7d;
    --shadow-md: 0 3px 10px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.48);
  }
}
:root[data-theme="dark"] {
  --color-bg: #2b2b2d;
  --color-surface: #424244;
  --color-surface-raised: #353537;
  --color-text: #f5f5f8;
  --color-text-secondary: #e7e7ea;
  --color-dim: #b7b7ba;
  --color-faint: #98989b;
  --color-accent: #94bce3;
  --color-accent-hover: #b5d9fd;
  --color-accent-active: #749dc4;
  --color-accent-text: #b5d9fd;
  --color-accent-100: #1d2d3d;
  --color-accent-200: #2c455d;
  --hairline: #5d5d60;
  --hairline-strong: #7a7a7d;
  --shadow-md: 0 3px 10px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.48);
}

/* ── Base ─────────────────────────────────────────────────────────── */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--color-accent-text); text-decoration-thickness: 1px; }
a:hover { color: var(--color-accent-hover); }

h1, h2, h3 {
  font-family: var(--font-heading);
  font-weight: 600;
  letter-spacing: 0.01em;
  margin: 0 0 var(--space-4);
}
h1 { font-size: clamp(2.4rem, 5vw, 3.6rem); line-height: 1.08; }
h2 { font-size: clamp(1.7rem, 3vw, 2.3rem); line-height: 1.15; }
h3 { font-size: 1.25rem; }

p { margin: 0 0 var(--space-4); color: var(--color-text-secondary); }

code, .mono {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-dim);
  margin: 0 0 var(--space-3);
  display: block;
}

.wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

section { padding: var(--space-16) 0; }
section + section { border-top: 1px solid var(--hairline); }

/* ── Nav ──────────────────────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--hairline);
}
.nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding-top: 0;
  padding-bottom: 0;
}
.nav-word {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: 0.01em;
}
.nav-links {
  display: flex;
  gap: var(--space-6);
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
}
.nav-links a:hover { color: var(--color-text); }
.nav-cta {
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-md);
  padding: 7px 14px;
  color: var(--color-text) !important;
}
.nav-cta:hover { border-color: var(--color-accent); background: var(--color-accent-100); }

/* ── Hero ─────────────────────────────────────────────────────────── */
.hero { padding-top: var(--space-16); }
.hero .wrap { text-align: center; }
.hero .eyebrow { text-align: center; }
.hero h1 { max-width: 780px; margin-inline: auto; }
.hero .lede {
  max-width: 620px;
  margin: var(--space-4) auto var(--space-8);
  font-size: 1.15rem;
  color: var(--color-text-secondary);
}
.cta-row {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-12);
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 1rem;
  text-decoration: none;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--color-accent);
  color: var(--color-bg);
}
.btn-primary:hover { background: var(--color-accent-hover); color: var(--color-bg); }
.btn-secondary {
  border-color: var(--hairline-strong);
  color: var(--color-text) !important;
}
.btn-secondary:hover { border-color: var(--color-accent); background: var(--color-accent-100); }

.shot-frame {
  border-radius: var(--radius-lg);
  border: 1px solid var(--hairline);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  background: var(--color-surface);
  line-height: 0;
}
.shot-frame img { display: block; width: 100%; height: auto; }
.hero .shot-frame { max-width: 980px; margin: 0 auto; }

/* ── Pillars ──────────────────────────────────────────────────────── */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  margin-top: var(--space-8);
}
.pillar h3 {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent-text);
  margin-bottom: var(--space-2);
}
.pillar p { margin: 0; }

/* ── Feature rows ─────────────────────────────────────────────────── */
.feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}
.feature:nth-of-type(even) .feature-text { order: 2; }
.feature-text h2 { margin-bottom: var(--space-3); }
.feature ul { margin: var(--space-4) 0 0; padding-left: 1.1em; color: var(--color-text-secondary); }
.feature li { margin-bottom: var(--space-2); }
.feature + .feature { margin-top: var(--space-16); }

/* ── Privacy list ─────────────────────────────────────────────────── */
.privacy-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6) var(--space-8);
  margin-top: var(--space-8);
}
.privacy-item {
  border-top: 1px solid var(--hairline);
  padding-top: var(--space-4);
}
.privacy-item h3 { font-size: 1.05rem; margin-bottom: var(--space-2); }
.privacy-item p { margin: 0; font-size: 0.97rem; }

/* ── Architecture ─────────────────────────────────────────────────── */
.arch-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-8);
}
.arch-card {
  background: var(--color-surface-raised);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}
.arch-card h3 { font-size: 1.05rem; margin-bottom: var(--space-2); }
.arch-card p { margin: 0; font-size: 0.95rem; }
.arch-note {
  margin-top: var(--space-8);
  padding: var(--space-6);
  border-left: 3px solid var(--color-accent);
  background: var(--color-surface-raised);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}
.arch-note p:last-child { margin-bottom: 0; }

/* ── Roadmap ──────────────────────────────────────────────────────── */
.roadmap-list {
  list-style: none;
  margin: var(--space-8) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}
.roadmap-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: var(--space-6);
  padding: var(--space-4) 0;
  border-top: 1px solid var(--hairline);
  align-items: baseline;
}
.roadmap-item:last-child { border-bottom: 1px solid var(--hairline); }
.roadmap-status {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-dim);
}
.roadmap-status.in-progress { color: var(--color-accent-text); }
.roadmap-item h3 { margin-bottom: var(--space-1); font-size: 1.05rem; }
.roadmap-item p { margin: 0; font-size: 0.95rem; }

/* ── Status / get it ──────────────────────────────────────────────── */
.status-card {
  background: var(--color-surface-raised);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
}
.status-card p:last-child { margin-bottom: 0; }
.get-it-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  margin-top: var(--space-8);
}
.get-it-card {
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}
.get-it-card h3 { margin-bottom: var(--space-2); }
.get-it-card pre {
  background: var(--color-surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  margin: var(--space-3) 0;
}

/* ── Footer ───────────────────────────────────────────────────────── */
footer {
  padding: var(--space-12) 0 var(--space-16);
  border-top: 1px solid var(--hairline);
}
footer .wrap {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: var(--space-6);
}
.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
}
.footer-links a { color: var(--color-text-secondary); text-decoration: none; font-size: 0.92rem; }
.footer-links a:hover { color: var(--color-text); }
footer .fine-print { font-size: 0.85rem; color: var(--color-faint); margin: var(--space-2) 0 0; }

/* ── Responsive ───────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .pillars { grid-template-columns: 1fr; gap: var(--space-6); }
  .feature { grid-template-columns: 1fr; }
  .feature:nth-of-type(even) .feature-text { order: 0; }
  .privacy-grid { grid-template-columns: 1fr; }
  .arch-grid { grid-template-columns: 1fr; }
  .get-it-grid { grid-template-columns: 1fr; }
  .roadmap-item { grid-template-columns: 1fr; gap: var(--space-1); }
  .nav-links { gap: var(--space-4); }
}
@media (max-width: 560px) {
  .nav-links a:not(.nav-cta) { display: none; }
}

/* Wide horizontal content (screenshots) must scroll inside itself, never
   the page — the same rule the app's own message list follows. */
.shot-frame { max-width: 100%; }