/* СтройРасчёт — основные стили */

:root {
  --paper: #FBFAF7;
  --paper-2: #F2F0EA;
  --ink: #1A1A17;
  --ink-2: #3D3D37;
  --muted: #74736A;
  --grid: #E3E8EC;
  --grid-strong: #C6D2DA;
  --brick: #B03A16;
  --brick-dark: #8C2E11;
  --slate: #0F4A4E;
  --line: #DAD7CE;
  --ok: #2F6B3A;

  --max: 1080px;
  --gap: 24px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background-color: var(--paper);
  background-image:
    repeating-linear-gradient(0deg, var(--grid) 0 1px, transparent 1px 40px),
    repeating-linear-gradient(90deg, var(--grid) 0 1px, transparent 1px 40px);
  background-position: 0 0;
  color: var(--ink);
  font-family: "Golos Text", "Segoe UI", Roboto, system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

img { max-width: 100%; }

a { color: var(--brick); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--slate);
  outline-offset: 2px;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Шапка ---------- */

.masthead {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.masthead-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.logo {
  font-family: "PT Sans Narrow", "Arial Narrow", sans-serif;
  font-weight: 700;
  font-size: 26px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--ink);
  line-height: 1;
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.logo:hover { text-decoration: none; }
.logo span { color: var(--brick); }

.logo-note {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-transform: uppercase;
}

.nav {
  margin-left: auto;
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.nav a {
  font-family: "PT Sans Narrow", "Arial Narrow", sans-serif;
  font-size: 17px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--ink-2);
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}
.nav a:hover { text-decoration: none; border-bottom-color: var(--grid-strong); }
.nav a.is-active { color: var(--brick); border-bottom-color: var(--brick); }

/* ---------- Шкала-разделитель ---------- */

.scale {
  height: 14px;
  background-image:
    repeating-linear-gradient(90deg, var(--ink) 0 1px, transparent 1px 10px),
    repeating-linear-gradient(90deg, var(--ink) 0 1px, transparent 1px 50px);
  background-size: 100% 5px, 100% 10px;
  background-position: 0 0, 0 0;
  background-repeat: no-repeat;
  opacity: 0.35;
  margin: 0;
  border: 0;
}

/* ---------- Титульный блок ---------- */

.hero {
  padding: 52px 0 40px;
}

.eyebrow {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 14px;
}

h1 {
  font-family: "PT Sans Narrow", "Arial Narrow", sans-serif;
  font-weight: 700;
  font-size: clamp(34px, 5vw, 50px);
  line-height: 1.02;
  letter-spacing: -0.005em;
  margin: 0 0 18px;
  max-width: 20ch;
}

.lede {
  font-size: 18px;
  max-width: 62ch;
  color: var(--ink-2);
  margin: 0;
}

/* ---------- Сетка калькуляторов ---------- */

.section {
  padding: 40px 0;
}

h2 {
  font-family: "PT Sans Narrow", "Arial Narrow", sans-serif;
  font-weight: 700;
  font-size: 30px;
  letter-spacing: 0.01em;
  margin: 0 0 6px;
}

h3 {
  font-family: "PT Sans Narrow", "Arial Narrow", sans-serif;
  font-weight: 700;
  font-size: 22px;
  margin: 28px 0 8px;
}

.section-note {
  color: var(--muted);
  font-size: 15px;
  margin: 0 0 24px;
  max-width: 62ch;
}

.tiles {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 12px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.tile {
  display: block;
  background: #fff;
  border: 1px solid var(--line);
  padding: 16px 16px 14px;
  color: var(--ink);
  position: relative;
  transition: border-color 0.15s, transform 0.15s;
}
.tile:hover {
  text-decoration: none;
  border-color: var(--brick);
  transform: translateY(-2px);
}

.tile-num {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: 8px;
}

.tile-name {
  font-family: "PT Sans Narrow", "Arial Narrow", sans-serif;
  font-size: 21px;
  font-weight: 700;
  line-height: 1.15;
  display: block;
}

.tile-sub {
  font-size: 13px;
  color: var(--muted);
  display: block;
  margin-top: 4px;
}

.tile.is-soon { opacity: 0.5; pointer-events: none; }

/* ---------- Калькулятор ---------- */

.calc {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 28px;
  align-items: start;
  margin: 8px 0 12px;
}

.calc-form {
  background: #fff;
  border: 1px solid var(--line);
  padding: 24px;
}

.field { margin-bottom: 16px; }

.field label {
  display: block;
  font-family: "PT Sans Narrow", "Arial Narrow", sans-serif;
  font-size: 17px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--ink-2);
  margin-bottom: 5px;
}

.field input[type="number"],
.field select {
  width: 100%;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 16px;
  padding: 9px 11px;
  border: 1px solid var(--grid-strong);
  background: var(--paper);
  color: var(--ink);
  border-radius: 0;
}

.field input[type="number"]:focus,
.field select:focus { background: #fff; }

.field-hint {
  font-size: 12px;
  color: var(--muted);
  margin-top: 4px;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.field-check {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 16px;
  font-size: 15px;
}
.field-check input { width: 17px; height: 17px; accent-color: var(--brick); }

fieldset {
  border: 1px solid var(--line);
  padding: 14px 14px 2px;
  margin: 0 0 18px;
}
legend {
  font-family: "PT Sans Narrow", "Arial Narrow", sans-serif;
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  padding: 0 6px;
}

.btn {
  width: 100%;
  font-family: "PT Sans Narrow", "Arial Narrow", sans-serif;
  font-size: 20px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 13px;
  background: var(--brick);
  color: #fff;
  border: 0;
  border-radius: 0;
  cursor: pointer;
  transition: background 0.15s;
}
.btn:hover { background: var(--brick-dark); }

/* ---------- Табло результата ---------- */

.readout {
  background: var(--ink);
  color: var(--paper);
  padding: 22px 22px 18px;
  position: sticky;
  top: 20px;
}

.readout-head {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #8B8A80;
  border-bottom: 1px solid #33332E;
  padding-bottom: 10px;
  margin-bottom: 16px;
  display: flex;
  justify-content: space-between;
}

.readout-main .r-label {
  font-size: 13px;
  color: #8B8A80;
  display: block;
  margin-bottom: 2px;
}

.readout-main .r-value {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 42px;
  font-weight: 700;
  line-height: 1.05;
  color: #F0A868;
  display: block;
  letter-spacing: -0.02em;
}

.readout-main .r-unit {
  font-size: 15px;
  color: #8B8A80;
  font-weight: 400;
  letter-spacing: 0;
}

.readout-main { margin-bottom: 18px; }

.readout-main.is-primary .r-value { color: #F0A868; }
.readout-main.is-secondary .r-value { font-size: 30px; color: var(--paper); }

.readout-rows {
  border-top: 1px solid #33332E;
  padding-top: 14px;
  margin: 0;
}

.readout-rows div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 14px;
  padding: 5px 0;
  border-bottom: 1px dotted #33332E;
}
.readout-rows div:last-child { border-bottom: 0; }
.readout-rows dt { color: #8B8A80; }
.readout-rows dd {
  margin: 0;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  text-align: right;
}

.readout-empty {
  color: #6E6D65;
  font-size: 14px;
  padding: 20px 0;
  text-align: center;
}

.readout-formula {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid #33332E;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 11px;
  line-height: 1.5;
  color: #6E6D65;
  word-break: break-word;
}

/* ---------- Текстовые блоки ---------- */

.prose { max-width: 68ch; }
.prose p { margin: 0 0 16px; }
.prose strong { font-weight: 600; }

.prose ul { padding-left: 20px; margin: 0 0 16px; }
.prose li { margin-bottom: 6px; }

.callout {
  border-left: 3px solid var(--brick);
  background: #fff;
  padding: 16px 18px;
  margin: 24px 0;
  max-width: 68ch;
}
.callout p:last-child { margin-bottom: 0; }
.callout-title {
  font-family: "PT Sans Narrow", "Arial Narrow", sans-serif;
  font-size: 18px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin: 0 0 6px;
}

/* ---------- Таблицы ---------- */

.table-wrap { overflow-x: auto; margin: 0 0 24px; }

table {
  border-collapse: collapse;
  width: 100%;
  background: #fff;
  font-size: 15px;
  min-width: 460px;
}

caption {
  text-align: left;
  font-family: "PT Sans Narrow", "Arial Narrow", sans-serif;
  font-size: 18px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 0 0 8px;
  color: var(--ink-2);
}

th, td {
  border: 1px solid var(--line);
  padding: 9px 12px;
  text-align: left;
}

thead th {
  background: var(--paper-2);
  font-family: "PT Sans Narrow", "Arial Narrow", sans-serif;
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-weight: 700;
}

tbody td + td,
thead th + th { text-align: right; font-family: "JetBrains Mono", ui-monospace, monospace; font-size: 14px; }

tbody tr:nth-child(odd) td { background: #FCFCFA; }

.table-note {
  font-size: 13px;
  color: var(--muted);
  margin: -14px 0 24px;
}

/* ---------- Связанное ---------- */

.related {
  border-top: 1px solid var(--line);
  padding-top: 20px;
  margin-top: 8px;
}
.related-title {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 10px;
}
.related-links { display: flex; gap: 18px; flex-wrap: wrap; }
.related-links a { font-family: "PT Sans Narrow", "Arial Narrow", sans-serif; font-size: 19px; }

/* ---------- Список обновлений ---------- */

.updates { list-style: none; padding: 0; margin: 0; max-width: 68ch; }
.updates li {
  border-bottom: 1px solid var(--line);
  padding: 12px 0;
  display: flex;
  gap: 16px;
  align-items: baseline;
}
.updates .u-date {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 12px;
  color: var(--muted);
  flex: 0 0 74px;
}

/* ---------- Подвал ---------- */

.foot {
  border-top: 1px solid var(--line);
  background: var(--paper-2);
  margin-top: 48px;
  padding: 28px 0 36px;
  font-size: 14px;
  color: var(--muted);
}

.foot-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  align-items: baseline;
}

.foot-links { display: flex; gap: 16px; flex-wrap: wrap; }
.foot-links a { color: var(--ink-2); }

.foot-meta {
  margin-left: auto;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.06em;
}

/* ---------- Адаптив ---------- */

@media (max-width: 860px) {
  .calc { grid-template-columns: 1fr; }
  .readout { position: static; }
}

@media (max-width: 620px) {
  body {
    background-image:
      repeating-linear-gradient(0deg, var(--grid) 0 1px, transparent 1px 32px),
      repeating-linear-gradient(90deg, var(--grid) 0 1px, transparent 1px 32px);
  }
  .masthead-inner { gap: 12px; }
  .logo-note { display: none; }
  .logo { font-size: 24px; }
  .nav { margin-left: 0; width: 100%; gap: 14px; }
  .nav a { font-size: 15px; }
  .hero { padding: 34px 0 26px; }
  .field-row { grid-template-columns: 1fr; }
  .calc-form { padding: 18px; }
  .foot-meta { margin-left: 0; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
  .tile:hover { transform: none; }
}