:root {
  --spacing: 16px;
  --spacing-lg: 24px;
  --radius: 12px;
}
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  font-size: 16px; /* >=16 to avoid iOS zoom on inputs */
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
.container {
  width: 100%;
  max-width: 680px;
  margin: 0 auto;
  padding: var(--spacing);
}
h1, h2, h3 { line-height: 1.2; margin: var(--spacing) 0; }
label { display: block; margin: 8px 0 4px; }
.input, input, select, button, .btn {
  font: inherit;
  font-size: 16px; /* prevents iOS zoom on focus */
  padding: 12px 14px;
  border-radius: var(--radius);
  border: 1px solid #d0d7de;
  width: 100%;
  box-sizing: border-box;
  min-height: 48px; /* large tap target */
}
button, .btn {
  cursor: pointer;
  background: #0b1220;
  color: #fff;
  border: none;
}
.btn--secondary { background: #555; }
.btn[disabled], .btn:disabled { opacity: .5; cursor: not-allowed; }
.row { margin-bottom: var(--spacing); }
.card {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: var(--radius);
  padding: var(--spacing);
}
.notice {
  font-size: 14px;
  color: #555;
}
.sticky-cta {
  position: sticky;
  bottom: env(safe-area-inset-bottom, 0);
  padding-bottom: calc(env(safe-area-inset-bottom, 0) + var(--spacing));
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-top: 1px solid #eee;
  padding-top: var(--spacing);
  margin-top: var(--spacing-lg);
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}