:root {
  --ink: #1b2430;
  --muted: #5b6675;
  --line: #dde3ea;
  --bg: #f6f8fa;
  --card: #ffffff;
  --accent: #0f6b5a;
  --accent-ink: #ffffff;
  --accent-soft: #e6f2ef;
  --warn: #9a4a00;
  --warn-soft: #fff3e6;
  --err: #b42318;
  --radius: 12px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
}
a { color: var(--accent); }
.wrap { max-width: 920px; margin: 0 auto; padding: 0 16px; }

.top { background: var(--card); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10; }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 60px; flex-wrap: wrap; }
.logo { font-weight: 700; font-size: 18px; color: var(--ink); text-decoration: none; }
.top nav { display: flex; gap: 18px; align-items: center; flex-wrap: wrap; font-size: 15px; }
.top nav a:not(.btn) { color: var(--muted); text-decoration: none; }
.top nav a:not(.btn):hover { color: var(--ink); }

main { padding: 24px 16px 48px; }
.crumbs { font-size: 14px; color: var(--muted); margin-bottom: 8px; }
.crumbs a { color: var(--muted); }
h1 { font-size: 34px; line-height: 1.2; margin: 8px 0 12px; letter-spacing: -0.01em; }
h2 { font-size: 24px; line-height: 1.3; margin: 36px 0 12px; }
.lead { font-size: 20px; color: var(--muted); margin: 0 0 20px; max-width: 720px; }
.muted { color: var(--muted); }
.small { font-size: 14px; }

.btn {
  display: inline-block; background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 10px;
  padding: 12px 20px; font: inherit; font-weight: 600; text-decoration: none; cursor: pointer;
}
.btn:hover { filter: brightness(1.08); }
.btn:disabled { opacity: .6; cursor: wait; }
.btn-secondary { background: var(--accent-soft); color: var(--accent); }
.btn-small { padding: 7px 14px; font-size: 15px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin: 8px 0; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; }
.card {
  display: flex; flex-direction: column; gap: 6px; background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 16px; color: var(--ink); text-decoration: none;
}
a.card:hover { border-color: var(--accent); }
.card span { font-size: 15px; }

.content { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 8px 24px 20px; }
.content h2:first-child { margin-top: 16px; }
.content li { margin: 4px 0; }
table { width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 15px; background: var(--card); }
th, td { text-align: left; border-bottom: 1px solid var(--line); padding: 10px 8px; vertical-align: top; }
th { color: var(--muted); font-weight: 600; }
pre { background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 14px; white-space: pre-wrap; font-size: 15px; }
.note { background: var(--accent-soft); border-radius: 10px; padding: 12px 16px; font-size: 15px; }

.calc, .upload {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 4px 24px 24px; margin-top: 28px;
}
.upload { border: 2px solid var(--accent); }
.row { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }
label { display: flex; flex-direction: column; gap: 6px; font-size: 15px; font-weight: 600; margin: 10px 0; }
input[type=text], input[type=email], input[type=date], select, textarea {
  font: inherit; font-weight: 400; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; background: #fff; color: var(--ink); width: 100%;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.file input { padding: 18px 12px; border: 2px dashed var(--line); border-radius: 10px; background: var(--bg); font-weight: 400; }
label.check { flex-direction: row; align-items: flex-start; gap: 10px; font-weight: 400; }
label.check input { margin-top: 5px; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.form-status { margin: 12px 0 0; font-weight: 600; }
.form-status.ok { color: var(--accent); }
.form-status.err { color: var(--err); }

.calc-result { margin-top: 16px; }
.calc-result .big { font-size: 20px; }
.warn { background: var(--warn-soft); color: var(--warn); border-radius: 10px; padding: 10px 14px; }

.steps ol { padding-left: 22px; }
.faq details { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 12px 16px; margin: 8px 0; }
.faq summary { cursor: pointer; font-weight: 600; }
.related { margin-top: 12px; }

.foot { border-top: 1px solid var(--line); background: var(--card); padding: 28px 0; }
.foot .cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }
.foot .cols div { display: flex; flex-direction: column; gap: 4px; font-size: 15px; }
.foot a { color: var(--muted); text-decoration: none; }
.foot a:hover { color: var(--ink); }

section, #calc, #upload { scroll-margin-top: 80px; }

@media (max-width: 600px) {
  body { font-size: 16px; }
  .top { position: static; }
  .top .wrap { min-height: 52px; padding-top: 8px; padding-bottom: 8px; }
  .top nav a:not(.btn) { display: none; }
  section, #calc, #upload { scroll-margin-top: 12px; }
  h1 { font-size: 27px; }
  .lead { font-size: 18px; }
  .content, .calc, .upload { padding-left: 16px; padding-right: 16px; }
  .top nav { gap: 12px; }
  table { font-size: 14px; }
}