/* Pure-Shell website. Green on black like the app; a light variant for light
   systems. No external fonts, scripts or images: the site makes no request to
   anyone but its own host. */

:root {
  color-scheme: dark light;
  --bg: #000000;
  --panel: #0a120c;
  --border: #14501f;
  --text: #bff5cc;
  --muted: #6fcb88;
  --accent: #33ff66;
  --on-accent: #000000;
  --focus: #33ff66;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "DejaVu Sans Mono", monospace;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6fbf7;
    --panel: #ffffff;
    --border: #bfe3c8;
    --text: #10331a;
    --muted: #3f6b4b;
    --accent: #0b7a2c;
    --on-accent: #ffffff;
    --focus: #0b7a2c;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

a { color: var(--accent); text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, .btn:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 4px;
}

code, kbd {
  font-family: var(--mono);
  font-size: 0.92em;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.05em 0.35em;
}

.wrap { max-width: 960px; margin: 0 auto; padding: 0 16px; }
.doc { max-width: 720px; margin: 0 auto; padding: 0 16px; }

/* Navigation */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.nav .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; min-height: 60px; gap: 4px 16px; padding-top: 6px; padding-bottom: 6px; }
.brand { white-space: nowrap; display: flex; align-items: center; gap: 10px; color: var(--accent); font-weight: 700; font-size: 1.15rem; text-decoration: none; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.nav ul { display: flex; flex-wrap: wrap; gap: 4px 18px; list-style: none; margin: 0; padding: 0; font-size: 0.95rem; }
.nav a { text-decoration: none; }
.nav ul a:hover { text-decoration: underline; }

/* Hero */
.hero { padding: 56px 0 40px; }
.hero .wrap { display: grid; gap: 32px; align-items: center; }
@media (min-width: 760px) { .hero .wrap { grid-template-columns: 1fr 240px; } }
.hero h1 { font-size: clamp(2.4rem, 7vw, 3.6rem); line-height: 1.05; margin: 0 0 12px; color: var(--accent); }
.hero .lead { font-size: 1.3rem; margin: 0 0 8px; }
.hero p { margin: 0 0 20px; color: var(--muted); }
.hero .icon { width: 200px; height: 200px; border-radius: 40px; border: 1px solid var(--border); justify-self: center; }

.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  display: inline-block; padding: 12px 22px; border-radius: 999px;
  font-weight: 600; text-decoration: none; border: 2px solid var(--accent);
  color: var(--accent); background: transparent;
}
.btn.primary { background: var(--accent); color: var(--on-accent); }
.btn:hover { filter: brightness(1.1); }
.btn[aria-disabled="true"] { border-style: dashed; opacity: 0.85; cursor: default; }
.btn[aria-disabled="true"]:hover { filter: none; }

/* Sections */
section { padding: 36px 0; }
h2 { font-size: 1.7rem; line-height: 1.2; margin: 0 0 16px; color: var(--accent); }
h3 { font-size: 1.15rem; margin: 0 0 6px; color: var(--accent); }

.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 18px 20px; }
.card p { margin: 0; color: var(--text); }

.checks { list-style: none; padding: 0; margin: 0; }
.checks li { padding-left: 1.6em; position: relative; margin: 6px 0; }
.checks li::before { content: "\2713"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }

/* Documents (privacy, terms) */
.docpage { padding-top: 40px; padding-bottom: 24px; }
.docpage h1 { font-size: clamp(2rem, 6vw, 2.6rem); margin: 0 0 8px; color: var(--accent); }
.docpage .date { color: var(--muted); font-style: italic; margin: 0 0 28px; }
.docpage h2 { font-size: 1.35rem; margin: 34px 0 10px; }
.docpage p, .docpage li { max-width: 68ch; }
.docpage ul { padding-left: 1.3em; }
.docpage li { margin: 4px 0; }
.back { display: inline-block; margin: 20px 0 0; font-size: 0.95rem; }

/* Footer */
.footer { border-top: 1px solid var(--border); margin-top: 32px; padding: 24px 0 40px; color: var(--muted); font-size: 0.95rem; }
.footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; }
.footer ul { display: flex; flex-wrap: wrap; gap: 4px 18px; list-style: none; margin: 0; padding: 0; }

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