/* Palette taken from the app's own theme, so the page and the icon it links to
   look like the same product. Dark mode is not decoration here: the app ships
   both themes, and a blinding white page from a dark phone at 2am is exactly
   when someone is checking on a crashed server. */
:root {
  color-scheme: light dark;

  --brand: #2f6fed;
  --brand-deep: #1e56c9;
  --brand-bright: #4c86f7;

  --ink: #14203a;
  --muted: #55637d;
  --paper: #f5f7fb;
  --surface: #ffffff;
  --line: #dfe6f2;
  --code-bg: #eef3fd;
  --shadow: 0 10px 30px rgba(20, 32, 58, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e8edf7;
    --muted: #9aa8c0;
    --paper: #0e1218;
    --surface: #161b24;
    --line: #262e3b;
    --code-bg: #1b2230;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    --brand: #6ea1ff;
    --brand-deep: #4c86f7;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  * {
    transition: none !important;
  }
}

body {
  margin: 0;
  /* System stack: no font CDN, so the page has no third-party connection to
     disclose and nothing blocking the first paint. */
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  width: min(1060px, 92vw);
  margin: 0 auto;
}

/* Keyboard users land here first; it stays out of the way until focused. */
.skip {
  position: absolute;
  left: -9999px;
  background: var(--brand);
  color: #fff;
  padding: 10px 16px;
  border-radius: 0 0 10px 0;
  z-index: 20;
}

.skip:focus {
  left: 0;
  top: 0;
}

/* --- header --------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  border-bottom: 1px solid var(--line);
}

.site-header .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
  font-size: 0.98rem;
}

.brand img {
  border-radius: 7px;
  flex-shrink: 0;
}

.actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
  padding: 8px 10px;
  border-radius: 8px;
}

.nav-link:hover {
  color: var(--ink);
  background: var(--code-bg);
}

/* --- buttons -------------------------------------------------------------- */

.btn {
  display: inline-block;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 10px;
  padding: 11px 18px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-main {
  background: linear-gradient(135deg, var(--brand-bright), var(--brand-deep));
  color: #fff;
  box-shadow: var(--shadow);
}

.btn-soft {
  color: var(--ink);
  border: 1px solid var(--line);
  background: var(--surface);
}

/* --- hero ----------------------------------------------------------------- */

.hero {
  padding: 72px 0 34px;
  max-width: 780px;
}

.eyebrow {
  margin: 0;
  color: var(--brand);
  text-transform: uppercase;
  font-size: 0.74rem;
  letter-spacing: 0.13em;
  font-weight: 700;
}

h1 {
  margin: 14px 0;
  font-size: clamp(2.1rem, 5vw, 3.3rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 1.3rem;
  letter-spacing: -0.01em;
  margin-top: 0;
  margin-bottom: 10px;
}

h3 {
  font-size: 1.02rem;
  margin: 0 0 10px;
}

.lead {
  color: var(--muted);
  font-size: 1.1rem;
  margin: 0;
}

.hero-cta {
  margin-top: 28px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.micro {
  color: var(--muted);
  font-size: 0.85rem;
}

.hero .micro {
  margin-top: 16px;
}

/* --- blocks --------------------------------------------------------------- */

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  padding: 10px 0;
}

.card,
.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px;
}

.card p,
.panel p,
.panel li,
.panel summary + p {
  color: var(--muted);
}

.panel {
  margin: 14px auto;
}

.split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  align-items: start;
}

/* Two sign-in routes side by side, because presenting them in sequence made
   the manual one look like a fallback for when the first fails. */
.ways {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.way {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px;
  background: color-mix(in srgb, var(--paper) 55%, transparent);
}

.way ol {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

.way li {
  margin-bottom: 4px;
}

.badge {
  display: inline-block;
  background: var(--brand);
  color: #fff;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 3px 8px;
  border-radius: 999px;
  vertical-align: middle;
  margin-right: 6px;
}

.note {
  font-size: 0.9rem;
  margin-bottom: 0;
}

.hint {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
  font-size: 0.92rem;
}

details {
  border-top: 1px solid var(--line);
  padding: 14px 0 2px;
}

details:first-of-type {
  border-top: none;
}

summary {
  cursor: pointer;
  font-weight: 600;
  list-style-position: outside;
}

summary::marker {
  color: var(--brand);
}

details p {
  margin: 10px 0 4px;
}

code {
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 2px 6px;
  font-family: ui-monospace, Consolas, "Courier New", monospace;
  font-size: 0.88em;
  /* A long address must wrap rather than push the page sideways on a phone. */
  overflow-wrap: anywhere;
}

.link {
  color: var(--brand);
  text-underline-offset: 3px;
}

/* --- footer --------------------------------------------------------------- */

.site-footer {
  margin-top: 32px;
  border-top: 1px solid var(--line);
  background: var(--surface);
}

.footer-grid {
  padding: 26px 0 34px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 16px;
  font-size: 0.9rem;
  align-items: start;
}

.footer-grid p {
  margin: 0;
}

/* --- responsive ----------------------------------------------------------- */

@media (max-width: 900px) {
  .cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 680px) {
  .cards,
  .split,
  .ways {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 44px;
  }

  /* The header stays one row. Stacking it turned the sticky bar into a block
     that ate a third of a small screen on every scroll. */
  .nav-link {
    display: none;
  }

  .brand span {
    font-size: 0.9rem;
  }

  .btn {
    padding: 10px 14px;
  }

  .hero-cta .btn {
    width: 100%;
    text-align: center;
  }
}