/* kepta — общий стиль лендинга и документов.
   Без сборки и без внешних зависимостей: один файл, системные шрифты. */

:root {
  --ink: #171a1f;
  --ink-soft: #4b5261;
  --bg: #fafaf7;
  --card: #ffffff;
  --line: #e4e4dc;
  --accent: #0d6b58;
  --warn-bg: #fdf6e4;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 760px; }

/* --- шапка --- */
header.site {
  border-bottom: 1px solid var(--line);
  background: var(--card);
  position: sticky; top: 0; z-index: 10;
}
header.site .wrap {
  display: flex; align-items: center; gap: 24px;
  min-height: 60px; flex-wrap: wrap; padding-top: 8px; padding-bottom: 8px;
}
.logo { font-family: var(--mono); font-weight: 700; font-size: 20px; letter-spacing: .04em; color: var(--ink); text-decoration: none; }
.logo b { color: var(--accent); }
nav.main { display: flex; gap: 18px; flex-wrap: wrap; }
nav.main a { color: var(--ink-soft); text-decoration: none; font-size: 14.5px; }
nav.main a:hover { color: var(--ink); }

/* --- типографика --- */
h1 { font-size: clamp(30px, 5vw, 46px); line-height: 1.15; margin: 0 0 16px; letter-spacing: -0.02em; }
h2 { font-size: clamp(22px, 3.4vw, 30px); line-height: 1.25; margin: 0 0 14px; letter-spacing: -0.01em; }
h3 { font-size: 18px; margin: 0 0 8px; }
p  { margin: 0 0 14px; }
.muted { color: var(--ink-soft); }
.mono { font-family: var(--mono); }
a { color: var(--accent); }

section { padding: 56px 0; }
section + section { border-top: 1px solid var(--line); }

/* --- hero --- */
.hero { padding: 80px 0 64px; }
.hero .tagline { font-family: var(--mono); color: var(--accent); font-size: 14px; letter-spacing: .12em; text-transform: uppercase; margin-bottom: 18px; }
.hero p.lead { font-size: 19px; max-width: 640px; }

.cta-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 26px; }
.btn {
  display: inline-block; padding: 12px 22px; border-radius: 8px;
  text-decoration: none; font-weight: 600; font-size: 15.5px;
  border: 1px solid transparent; cursor: pointer;
}
.btn.primary { background: var(--accent); color: #fff; }
.btn.primary:hover { background: #0b5a4a; }
.btn.ghost { border-color: var(--line); color: var(--ink); background: var(--card); }
.btn.ghost:hover { border-color: var(--ink-soft); }
.btn[disabled], .btn.disabled { opacity: .55; cursor: not-allowed; }

/* --- карточки --- */
.grid { display: grid; gap: 16px; }
.grid.c2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid.c3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 22px;
}
.card h3 { margin-top: 0; }
.card .tag { font-family: var(--mono); font-size: 12px; color: var(--accent); letter-spacing: .08em; text-transform: uppercase; }

/* --- расчёт / формулы --- */
.calc {
  background: var(--ink); color: #e8eae6; border-radius: 12px;
  padding: 24px; font-family: var(--mono); font-size: 14.5px;
  overflow-x: auto;
}
.calc .dim { color: #8b93a3; }
.calc .pos { color: #6fd3ab; }
.calc .neg { color: #f0a8a0; }
.calc table { border-collapse: collapse; width: 100%; }
.calc td { padding: 3px 14px 3px 0; white-space: nowrap; }

/* --- тарифы --- */
.plans { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); align-items: stretch; }
.plan { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 22px; display: flex; flex-direction: column; }
.plan.hot { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.plan .price { font-size: 30px; font-weight: 700; font-family: var(--mono); margin: 6px 0 2px; }
.plan .per { color: var(--ink-soft); font-size: 13.5px; }
.plan ul { padding-left: 18px; margin: 12px 0; flex: 1; }
.plan li { margin-bottom: 6px; font-size: 14.5px; }
.recur-note {
  font-family: var(--mono); font-size: 13px; background: var(--warn-bg);
  border: 1px solid #ecdfb5; border-radius: 8px; padding: 10px 12px; margin-top: 10px;
}

/* --- FAQ --- */
details { border: 1px solid var(--line); border-radius: 10px; background: var(--card); padding: 14px 18px; margin-bottom: 10px; }
details summary { cursor: pointer; font-weight: 600; }
details p { margin-top: 10px; }

/* --- таблица сканера --- */
.table-scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: 12px; background: var(--card); }
table.data { border-collapse: collapse; width: 100%; font-size: 14px; }
table.data th, table.data td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--line); white-space: nowrap; }
table.data th { font-family: var(--mono); font-size: 12px; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-soft); }
table.data tr:last-child td { border-bottom: 0; }
table.data td.num { font-family: var(--mono); text-align: right; }
table.data th.num { text-align: right; }
table.data td.q { white-space: normal; min-width: 260px; }

/* --- документы --- */
.doc { padding: 48px 0 80px; }
.doc h1 { font-size: 28px; }
.doc h2 { font-size: 20px; margin-top: 34px; }
.doc ol, .doc ul { padding-left: 22px; }
.doc li { margin-bottom: 6px; }
.placeholder { background: var(--warn-bg); border-bottom: 2px dashed #d8b94d; padding: 0 3px; font-family: var(--mono); font-size: .93em; }

/* --- футер --- */
footer.site { border-top: 1px solid var(--line); padding: 40px 0 60px; color: var(--ink-soft); font-size: 14px; background: var(--card); }
footer.site .cols { display: grid; gap: 24px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
footer.site a { color: var(--ink-soft); }
.disclaimer { margin-top: 24px; padding-top: 18px; border-top: 1px solid var(--line); font-size: 13px; }

/* --- курс: программа и читалка --- */
.modules { display: grid; gap: 12px; }
.module-row {
  display: flex; gap: 18px; align-items: flex-start;
  background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 18px 20px;
}
.module-row .num {
  font-family: var(--mono); font-size: 22px; font-weight: 700;
  color: var(--accent); min-width: 34px; line-height: 1.2;
}
.module-row .body { flex: 1; min-width: 0; }
.module-row h3 { margin-bottom: 4px; }
.module-row p { margin: 0 0 8px; font-size: 15px; color: var(--ink-soft); }
.module-row .meta { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; font-size: 13px; }
.module-row .lock { font-family: var(--mono); font-size: 12px; color: var(--ink-soft); }

.lesson { padding: 40px 0 72px; }
.lesson h2 { font-size: 22px; margin-top: 36px; }
.lesson h3 { font-size: 17px; margin-top: 24px; }
.lesson ul, .lesson ol { padding-left: 22px; }
.lesson li { margin-bottom: 8px; }
.lesson p.lead { font-size: 18px; }
.lesson .calc { margin: 18px 0; }
.lesson .table-scroll { margin: 18px 0; }
.callout {
  background: var(--warn-bg); border: 1px solid #ecdfb5;
  border-radius: 10px; padding: 16px 18px; margin: 20px 0; font-size: 15px;
}
.lesson-nav { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-top: 40px; }

/* --- формы: оплата, вход --- */
.form { max-width: 460px; }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 14px; margin-bottom: 5px; color: var(--ink-soft); }
.field input[type="email"], .field input[type="password"] {
  width: 100%; padding: 11px 13px; font-size: 15px;
  border: 1px solid var(--line); border-radius: 8px; background: var(--card);
  color: var(--ink); font-family: inherit;
}
.field input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.check { display: flex; gap: 9px; align-items: flex-start; font-size: 14px; margin-bottom: 16px; }
.check input { margin-top: 3px; flex-shrink: 0; }
.notice { border-radius: 8px; padding: 12px 14px; font-size: 14.5px; margin: 14px 0; }
.notice.err { background: #fdefec; border: 1px solid #f0c8c0; }
.notice.ok { background: #eaf5f0; border: 1px solid #b9dfcd; }
.pick { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); margin-bottom: 26px; }
.pick label {
  display: block; background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 16px 18px; cursor: pointer;
}
.pick label.on { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.pick .price { font-family: var(--mono); font-size: 24px; font-weight: 700; margin: 4px 0 2px; }
.pick .per { font-size: 13.5px; color: var(--ink-soft); }

/* --- реквизиты --- */
.reqs { font-size: 15px; }
.reqs dt { font-size: 13px; color: var(--ink-soft); margin-top: 12px; }
.reqs dd { margin: 2px 0 0; font-family: var(--mono); }

/* мелочь */
.badge { display: inline-block; font-family: var(--mono); font-size: 12px; border: 1px solid var(--line); border-radius: 99px; padding: 2px 10px; color: var(--ink-soft); }
.center { text-align: center; }