/*
 * Стилистика в духе karpinskyinstitute.ru: строгий институциональный госстиль —
 * тёмно-бирюзовая шапка/меню, золотисто-бронзовый акцент, белый фон, жирный
 * капслок в навигации. Цвета вынесены в переменные — при точной сверке с сайтом
 * (доступа к нему из среды разработки не было, стиль снят со скриншота) их
 * достаточно поправить в одном месте.
 */

:root {
  --ki-teal: #0c6b54;
  --ki-teal-dark: #094f3e;
  --ki-gold: #a47c3e;
  --ki-gold-dark: #8a6730;
  --ki-ink: #1a1a1a;
  --ki-gray: #5b6360;
  --ki-border: #d8ddda;
  --ki-bg: #f4f6f5;
  --ki-white: #ffffff;
  --ki-radius: 2px;
  --font-main: Arial, "PT Sans", "Helvetica Neue", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-main);
  color: var(--ki-ink);
  background: var(--ki-white);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

/* ---------- Демо-шапка института (для контекста, не часть виджета) ---------- */

.ki-header {
  background: var(--ki-teal);
  color: var(--ki-white);
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}
.ki-header__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}
.ki-header__brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.ki-header__title {
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-size: 18px;
}
.ki-header__contacts {
  display: flex;
  gap: 18px;
  font-size: 13px;
  opacity: 0.92;
  flex-wrap: wrap;
}

.ki-nav {
  background: var(--ki-teal-dark);
}
.ki-nav__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  gap: 26px;
  flex-wrap: wrap;
}
.ki-nav__inner a {
  display: inline-block;
  padding: 13px 0;
  color: var(--ki-white);
  text-decoration: none;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 13px;
  letter-spacing: 0.02em;
  border-bottom: 3px solid transparent;
}
.ki-nav__inner a.is-current,
.ki-nav__inner a:hover {
  border-bottom-color: var(--ki-gold);
}

.page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px 60px;
}

.breadcrumb {
  padding: 18px 0 22px;
  border-bottom: 3px solid var(--ki-teal);
  margin-bottom: 30px;
}
.breadcrumb__title {
  display: block;
  font-weight: 700;
  color: var(--ki-teal);
  font-size: 18px;
  margin-bottom: 4px;
}
.breadcrumb__path {
  display: block;
  font-size: 13px;
  color: var(--ki-gray);
}

.ki-footer {
  background: var(--ki-teal-dark);
  color: var(--ki-white);
  margin-top: 50px;
}
.ki-footer__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
  font-size: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  opacity: 0.85;
}

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

.calc-widget {
  border: 1px solid var(--ki-border);
}

.calc-widget__title {
  margin: 0;
  background: var(--ki-gold);
  color: var(--ki-white);
  font-size: 18px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  padding: 16px 22px;
}

.calc-widget__body {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 0;
  align-items: start;
  background: var(--ki-white);
}

.calc-options {
  padding: 26px;
  display: flex;
  flex-direction: column;
  gap: 26px;
  border-right: 1px solid var(--ki-border);
}

.calc-group__label {
  font-weight: 700;
  text-transform: uppercase;
  font-size: 13px;
  letter-spacing: 0.03em;
  color: var(--ki-teal-dark);
  margin-bottom: 10px;
}

.calc-tiles {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.calc-tiles--qty .calc-tile {
  min-width: 78px;
  text-align: center;
}

.calc-tile {
  appearance: none;
  border: 1px solid var(--ki-border);
  background: var(--ki-white);
  color: var(--ki-ink);
  border-radius: var(--ki-radius);
  padding: 10px 16px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease;
  line-height: 1.3;
}
.calc-tile span {
  display: block;
  font-weight: 400;
  font-size: 11px;
  color: var(--ki-gray);
  margin-top: 2px;
}
.calc-tile:hover {
  border-color: var(--ki-teal);
}
.calc-tile.is-active {
  background: var(--ki-teal);
  border-color: var(--ki-teal);
  color: var(--ki-white);
}
.calc-tile.is-active span {
  color: rgba(255, 255, 255, 0.85);
}

.calc-group--checkbox {
  border-top: 1px solid var(--ki-border);
  padding-top: 20px;
}

.calc-checkbox {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
.calc-checkbox input {
  width: 18px;
  height: 18px;
  accent-color: var(--ki-teal);
}
.calc-checkbox em {
  font-style: normal;
  font-weight: 400;
  color: var(--ki-gray);
}

.calc-summary {
  background: var(--ki-teal);
  color: var(--ki-white);
  padding: 26px 24px;
  position: sticky;
  top: 16px;
  align-self: start;
}
.calc-summary__label {
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.06em;
  opacity: 0.8;
}
.calc-summary__price {
  font-size: 36px;
  font-weight: 700;
  margin: 6px 0 2px;
}
.calc-summary__per-unit {
  font-size: 13px;
  opacity: 0.85;
  margin-bottom: 18px;
}

.calc-summary__details {
  margin: 0 0 22px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.25);
  font-size: 13px;
}
.calc-summary__details div {
  display: flex;
  justify-content: space-between;
  padding: 4px 0;
}
.calc-summary__details dt {
  opacity: 0.75;
}
.calc-summary__details dd {
  margin: 0;
  font-weight: 600;
  text-align: right;
}

.calc-summary__cta {
  width: 100%;
  background: var(--ki-gold);
  color: var(--ki-white);
  border: none;
  border-radius: var(--ki-radius);
  padding: 13px 16px;
  font-family: inherit;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 13px;
  letter-spacing: 0.03em;
  cursor: pointer;
  transition: background 0.15s ease;
}
.calc-summary__cta:hover {
  background: var(--ki-gold-dark);
}

.calc-summary__disclaimer {
  font-size: 11px;
  opacity: 0.75;
  line-height: 1.4;
  margin: 12px 0 0;
}

/* ---------------------------- Адаптив ---------------------------- */

@media (max-width: 860px) {
  .calc-widget__body {
    grid-template-columns: 1fr;
  }
  .calc-options {
    border-right: none;
    border-bottom: 1px solid var(--ki-border);
    padding-bottom: 100px; /* место под fixed-панель снизу */
  }
  .calc-summary {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    top: auto;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 14px 18px;
    box-shadow: 0 -6px 18px rgba(0, 0, 0, 0.18);
  }
  .calc-summary__label { display: none; }
  .calc-summary__details { display: none; }
  .calc-summary__disclaimer { display: none; }
  .calc-summary__price {
    margin: 0;
    font-size: 22px;
  }
  .calc-summary__per-unit {
    margin: 0;
    font-size: 11px;
  }
  .calc-summary__cta {
    width: auto;
    flex: none;
    padding: 12px 18px;
  }
  .ki-header__contacts { display: none; }
  .ki-footer { padding-bottom: 74px; }
}

@media (max-width: 520px) {
  .calc-summary {
    flex-wrap: wrap;
  }
}