/* BackScan – single stylesheet. System fonts only: nothing loaded from third parties. */

:root {
  --green: #2f6b4f;        /* primary: muted forest green */
  --green-dark: #24543e;
  --green-soft: #e7f0eb;
  --text: #1d2723;
  --muted: #5b6863;
  --bg: #fbfcfb;
  --bg-alt: #f1f5f3;
  --card: #ffffff;
  --border: #d9e2dd;
  --on-green: #ffffff;
  --radius: 10px;
  --max: 1080px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --green: #6fb08f;
    --green-dark: #8cc3a6;
    --green-soft: #1f2e27;
    --text: #e4ebe7;
    --muted: #9eaca6;
    --bg: #121816;
    --bg-alt: #18201d;
    --card: #1c2522;
    --border: #2c3833;
    --on-green: #0f1613;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

a { color: var(--green); }
a:hover { color: var(--green-dark); }

h1, h2, h3 { line-height: 1.2; margin: 0 0 0.6em; }
h1 { font-size: clamp(2rem, 5vw, 3.1rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); letter-spacing: -0.01em; }
h3 { font-size: 1.15rem; }
p  { margin: 0 0 1em; }

.container { max-width: var(--max); margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 720px; }
.center { text-align: center; }
.center .lead { margin-left: auto; margin-right: auto; }
.muted { color: var(--muted); }
.small { font-size: 0.9rem; }

.skip-link {
  position: absolute; left: -999px; top: 8px;
  background: var(--green); color: var(--on-green); padding: 8px 12px; border-radius: 6px;
}
.skip-link:focus { left: 8px; z-index: 10; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.7em 1.3em;
  border-radius: var(--radius);
  border: 2px solid var(--green);
  background: var(--green);
  color: var(--on-green);
  font-weight: 600;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s;
}
.btn:hover { background: var(--green-dark); border-color: var(--green-dark); color: var(--on-green); }
.btn-ghost { background: transparent; color: var(--green); }
.btn-ghost:hover { background: var(--green-soft); color: var(--green-dark); }
.btn-small { padding: 0.4em 0.9em; font-size: 0.95rem; }
.btn-large { padding: 0.9em 1.8em; font-size: 1.1rem; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 5;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 1.2rem; color: var(--text); text-decoration: none;
}
.brand-logo { width: 28px; height: 28px; color: var(--green); }
.site-nav { display: flex; align-items: center; gap: 22px; }
.site-nav a:not(.btn) { color: var(--text); text-decoration: none; }
.site-nav a:not(.btn):hover { color: var(--green); }

/* Hero */
.hero { padding: 88px 0 72px; background: linear-gradient(180deg, var(--green-soft), var(--bg)); }
.eyebrow {
  display: inline-block; margin-bottom: 1.2em;
  padding: 0.25em 0.8em; border-radius: 999px;
  background: var(--card); border: 1px solid var(--border);
  color: var(--green); font-size: 0.85rem; font-weight: 600;
}
.lead { font-size: 1.2rem; color: var(--muted); max-width: 640px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

/* Sections */
.section { padding: 72px 0; }
.section-alt { background: var(--bg-alt); }
.section-cta { background: var(--green-soft); }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; }
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
}
.card p:last-child { margin-bottom: 0; color: var(--muted); }

.steps {
  list-style: none; padding: 0; margin: 0; counter-reset: step;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 28px;
}
.steps li { counter-increment: step; }
.steps li::before {
  content: counter(step);
  display: grid; place-items: center;
  width: 40px; height: 40px; margin-bottom: 14px; border-radius: 50%;
  background: var(--green); color: var(--on-green); font-weight: 700;
}
.steps p { color: var(--muted); }

.checklist { list-style: none; padding: 0; margin: 0 0 1.5em; }
.checklist li { position: relative; padding-left: 32px; margin-bottom: 0.8em; }
.checklist li::before {
  content: "✓"; position: absolute; left: 0; top: 0;
  color: var(--green); font-weight: 700;
}

/* Long text pages (privacy, terms) */
.prose h2 { font-size: 1.35rem; margin-top: 2em; }
.prose ul { padding-left: 1.3em; margin: 0 0 1em; }
.prose li { margin-bottom: 0.35em; }
.notice {
  background: var(--green-soft); border-left: 4px solid var(--green);
  border-radius: var(--radius); padding: 18px 20px; margin: 1.5em 0 2em;
}
.notice p:last-child { margin-bottom: 0; }

/* Placeholders the owner must fill in before going public */
.todo { background: #fff3c4; color: #5c4400; padding: 0 0.25em; border-radius: 4px; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 28px 0; font-size: 0.95rem; color: var(--muted); }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
.footer-inner p { margin: 0; }
.footer-inner nav { display: flex; flex-wrap: wrap; gap: 18px; }
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--green); }

/* Small screens */
@media (max-width: 640px) {
  .site-nav a:not(.btn) { display: none; }
  .hero { padding: 56px 0 48px; }
  .section { padding: 52px 0; }
}