:root {
  --bg: #f8fafc; --surface: #ffffff; --text: #0f172a; --muted: #4b5563; --border: #e2e8f0;
  --primary: #2563eb; --primary-hover: #1d4ed8; --primary-text: #ffffff;
  --accent: #f59e0b; --success: #15803d; --danger: #dc2626;
  --radius: 12px; --shadow: 0 6px 24px rgba(15, 23, 42, 0.08); --max: 720px;
  --border-strong: #64748b; --accent-text: #92400e; --primary-tint: rgba(37, 99, 235, 0.08); --accent-tint: rgba(245, 158, 11, 0.15); color-scheme: light;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { font: 17px/1.55 -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; background: var(--bg); color: var(--text); }
.wrap { max-width: var(--max); margin: 0 auto; padding: 32px 20px 64px; }
.brand { font-weight: 800; letter-spacing: -0.02em; font-size: 20px; color: var(--text); text-decoration: none; }
h1 { font-size: clamp(30px, 5vw, 44px); line-height: 1.1; letter-spacing: -0.02em; margin: 24px 0 12px; }
h2 { font-size: clamp(22px, 3.5vw, 30px); line-height: 1.2; margin: 0 0 12px; }
p.lead { font-size: 20px; color: var(--muted); margin: 0 0 24px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 28px; }
.btn { font: inherit; display: inline-block; background: var(--primary); color: var(--primary-text); border: 0; border-radius: 10px; padding: 16px 26px; font-size: 18px; font-weight: 700; cursor: pointer; text-decoration: none; }
.btn:hover { background: var(--primary-hover); }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }
:where(a, button, input, [tabindex]):focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; border-radius: 6px; }
.btn-wide { width: 100%; text-align: center; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.mt { margin-top: 20px; }
.opts { display: grid; gap: 10px; margin: 18px 0; }
.opt { font: inherit; display: flex; align-items: center; gap: 12px; padding: 16px 18px; border: 2px solid var(--border-strong); border-radius: 10px; background: var(--surface); cursor: pointer; font-size: 17px; text-align: left; width: 100%; }
.opt:hover { border-color: var(--primary); }
.opt.selected { border-color: var(--primary); background: var(--primary-tint); }
.progress { height: 8px; background: var(--border); border-radius: 999px; overflow: hidden; margin-bottom: 20px; }
.progress > div { height: 100%; background: var(--primary); transition: width 0.25s; }
.rate-row { display: grid; grid-template-columns: 1fr; gap: 8px; padding: 14px 0; border-bottom: 1px solid var(--border); }
.rate-row .seg { display: flex; gap: 6px; }
.seg button { font: inherit; flex: 1; padding: 10px 6px; border: 2px solid var(--border-strong); border-radius: 8px; background: var(--surface); cursor: pointer; font-size: 14px; color: var(--text); min-height: 44px; }
.seg button.selected { border-color: var(--primary); background: var(--primary-tint); font-weight: 700; }
input[type="text"], input[type="email"], input[type="tel"] { font: inherit; width: 100%; padding: 14px; font-size: 17px; border: 2px solid var(--border-strong); border-radius: 10px; margin: 6px 0 14px; }
input[type="range"] { width: 100%; height: 44px; accent-color: var(--primary); }
.price-big { font-size: 48px; font-weight: 800; text-align: center; margin: 8px 0; }
.pill { display: inline-block; background: var(--accent-tint); color: var(--accent-text); border-radius: 999px; padding: 6px 12px; font-weight: 700; font-size: 14px; }
.check { list-style: none; padding: 0; margin: 16px 0; }
.check li { padding: 6px 0 6px 30px; position: relative; }
.check li::before { content: "\2713"; position: absolute; left: 0; color: var(--success); font-weight: 800; }
.err { color: var(--danger); font-size: 15px; min-height: 20px; }
footer { margin-top: 48px; font-size: 13px; color: var(--muted); }
footer a { color: var(--muted); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 14px; }
.stat b { display: block; font-size: 26px; }
#checkout { min-height: 420px; margin-top: 20px; }