:root {
  --bg: #f6f4ef;
  --card: #ffffff;
  --ink: #1d1d1b;
  --muted: #6b6a66;
  --accent: #128c7e;
  --accent-ink: #ffffff;
  --border: #e4e1d8;
  --error: #b42318;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121412;
    --card: #1b1e1c;
    --ink: #f1f1ee;
    --muted: #a4a7a2;
    --accent: #25d366;
    --accent-ink: #0b1a10;
    --border: #2c302d;
    --error: #ff8a80;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
}
main { max-width: 1040px; margin: 0 auto; padding: 32px 16px 64px; }
.narrow { max-width: 560px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 28px; }
main.card { margin-top: 48px; }
h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); line-height: 1.15; margin: 0 0 12px; }
h2 { font-size: 1.15rem; margin: 0 0 8px; }
p.lead { font-size: 1.15rem; color: var(--muted); margin: 0 0 28px; }
.hero { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 32px; align-items: start; margin-top: 24px; }
@media (max-width: 820px) { .hero { grid-template-columns: 1fr; } }
.brand { font-weight: 700; letter-spacing: 0.02em; color: var(--accent); }
label { display: block; font-weight: 600; margin: 16px 0 6px; }
input[type="tel"], input[type="password"], input[type="text"] {
  width: 100%; padding: 14px; font-size: 1.05rem; border-radius: 10px;
  border: 1px solid var(--border); background: transparent; color: var(--ink);
}
.check { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; font-size: 0.92rem; color: var(--muted); }
.check input { margin-top: 4px; }
button, .button {
  display: inline-block; width: 100%; margin-top: 20px; padding: 14px 18px; font-size: 1.05rem; font-weight: 600;
  border: 0; border-radius: 10px; background: var(--accent); color: var(--accent-ink); cursor: pointer; text-align: center; text-decoration: none;
}
button:disabled { opacity: 0.6; cursor: wait; }
.msg { margin-top: 16px; font-size: 0.95rem; }
.msg.error { color: var(--error); }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-top: 40px; }
.features .card { padding: 20px; }
.features p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.small { font-size: 0.85rem; color: var(--muted); }
a { color: var(--accent); }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border); vertical-align: top; }
pre { white-space: pre-wrap; margin: 0; font-size: 0.82rem; }