/* Base: system fonts and reset */
:root {
  --bg: #ffffff;
  --fg: #0b0f14;
  --muted: #556070;
  --border: #e6e8eb;
  --primary: #0a7cff;
  --primary-fg: #ffffff;
  --alt: #f6f8fa;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f14;
    --fg: #e6eaf0;
    --muted: #98a2b3;
    --border: #1a2430;
    --primary: #63a4ff;
    --primary-fg: #0b0f14;
    --alt: #0f1520;
  }
}

html { scroll-behavior: smooth; }

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Helvetica Neue", Arial, system-ui, sans-serif;
  line-height: 1.55;
  color: var(--fg);
  background: var(--bg);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

.container {
  max-width: 1100px;
  padding: 0 20px;
  margin: 0 auto;
}

/* Header */
.site-header {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { font-weight: 700; color: var(--fg); text-decoration: none; font-size: 1.1rem; }
.nav { display: flex; gap: 16px; align-items: center; }
.nav a { color: var(--fg); text-decoration: none; opacity: 0.9; }
.nav a:hover { opacity: 1; }

.menu-toggle { display: none; background: none; border: 0; padding: 8px; }
.menu-bar { display: block; width: 22px; height: 2px; background: var(--fg); margin: 4px 0; }

@media (max-width: 800px) {
  .menu-toggle { display: inline-block; }
  .nav { position: absolute; inset: 64px 0 auto 0; background: var(--bg); border-bottom: 1px solid var(--border); display: none; flex-direction: column; padding: 12px 20px; }
  .nav.open { display: flex; }
}

/* Sections */
.section { padding: 72px 0; }
.section-alt { background: var(--alt); }
.hero { padding: 96px 0 72px; text-align: center; }
.hero h1 { font-size: clamp(2rem, 4vw, 3rem); margin: 0 0 12px; }
.hero .tagline { margin: 0 0 12px; color: var(--muted); font-size: 0.95rem; }
.hero .sub { color: var(--muted); max-width: 720px; margin: 0 auto 24px; }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.step { border: 1px solid var(--border); border-radius: 12px; padding: 20px; background: var(--bg); }
.step-num { width: 28px; height: 28px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; background: var(--alt); color: var(--muted); font-weight: 700; margin-bottom: 8px; }
@media (max-width: 800px) { .steps { grid-template-columns: 1fr; } }

/* Features */
.feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px 20px; padding-left: 16px; }
@media (max-width: 800px) { .feature-list { grid-template-columns: 1fr; } }

/* Pricing */
.pricing { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.price-card { border: 1px solid var(--border); border-radius: 12px; padding: 20px; background: var(--bg); }
.price-card.popular { outline: 2px solid var(--primary); }
.price { font-size: 1.6rem; font-weight: 700; margin: 8px 0 12px; }
.btn-block { display: block; text-align: center; }
@media (max-width: 800px) { .pricing { grid-template-columns: 1fr; } }

/* CTA */
.cta { text-align: center; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 20px 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.foot-left, .foot-right { display: flex; align-items: center; gap: 12px; }
.foot-right a { color: var(--muted); text-decoration: none; }
.foot-right a:hover { color: var(--fg); }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 40px; padding: 0 16px; border-radius: 10px; background: var(--primary); color: var(--primary-fg); text-decoration: none; border: 1px solid var(--primary); font-weight: 600; }
.btn:hover { filter: brightness(1.05); }
.btn-outline { background: transparent; color: var(--fg); border-color: var(--border); }
.btn-small { height: 32px; padding: 0 12px; font-size: 0.9rem; }

/* Notice */
.notice { position: fixed; left: 0; right: 0; bottom: 0; background: var(--bg); border-top: 1px solid var(--border); padding: 10px 0; display: none; }
.notice.show { display: block; }
.notice-inner { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.notice p { margin: 0; color: var(--muted); }

/* Accessibility helpers */
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

/* Legal pages */
.legal-intro { margin-bottom: 20px; }
.legal-intro .updated { color: var(--muted); }
.legal-notice { background: var(--alt); border: 1px solid var(--border); border-radius: 10px; padding: 12px; margin-bottom: 12px; }
.legal-layout { display: grid; grid-template-columns: 260px 1fr; gap: 24px; align-items: start; }
.toc { position: sticky; top: 84px; border: 1px solid var(--border); background: var(--bg); border-radius: 12px; padding: 12px; display: none; }
.toc-title { font-weight: 700; margin-bottom: 8px; }
.toc nav { display: grid; gap: 6px; }
.toc a { color: var(--muted); text-decoration: none; font-size: 0.95rem; }
.toc a:hover { color: var(--fg); }
.legal-content section { margin: 20px 0; }
@media (min-width: 1000px) { .toc { display: block; } }
@media (max-width: 999px) { .legal-layout { grid-template-columns: 1fr; } }