/* ============================================================
   Металлический калькулятор ssw.kz — собственная реализация
   Дизайн в стиле metal-calculator.ru (синяя тема, колонки)
   ============================================================ */

.mcalc {
  --mc-primary: #1c4f82;
  --mc-primary-d: #163f68;
  --mc-primary-l: rgba(28, 79, 130, 0.06);
  --mc-primary-l2: rgba(28, 79, 130, 0.12);
  --mc-border: #e1e6ec;
  --mc-text: #2b2f33;
  --mc-muted: #7a8189;
  --mc-bg: #ffffff;
  --mc-result-bg: #f4f7fa;

  font-family: Arial, "Helvetica Neue", Helvetica, sans-serif;
  color: var(--mc-text);
  background: var(--mc-bg);
  border: 1px solid var(--mc-border);
  border-radius: 8px;
  overflow: hidden;
  max-width: 960px;
  margin: 0 auto;
  box-sizing: border-box;
}

.mcalc *,
.mcalc *::before,
.mcalc *::after {
  box-sizing: border-box;
}

/* ---------- Верхние вкладки ---------- */
.mcalc__tabs {
  display: flex;
  background: var(--mc-primary);
  flex-wrap: wrap;
}

.mcalc__tab {
  appearance: none;
  border: 0;
  background: transparent;
  color: rgba(255, 255, 255, 0.75);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  padding: 16px 22px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.mcalc__tab:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.mcalc__tab.is-active {
  color: #fff;
  background: var(--mc-primary-d);
}

/* ---------- Тело вкладки ---------- */
.mcalc__panel {
  display: none;
}

.mcalc__panel.is-active {
  display: block;
}

/* ---------- Сетка калькулятора ---------- */
.mcalc__grid {
  display: grid;
  grid-template-columns: 150px 200px 1fr 320px;
  min-height: 460px;
}

.mcalc__col {
  border-right: 1px solid var(--mc-border);
}

.mcalc__col--list {
  padding: 0;
}

.mcalc__col-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--mc-muted);
  padding: 16px 18px 10px;
}

.mcalc__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.mcalc__list li {
  list-style: none;
  margin: 0;
  padding: 0;
}

.mcalc__list li::before,
.mcalc__list li::marker {
  content: none;
  display: none;
}

.mcalc__list-item {
  display: block;
  width: 100%;
  text-align: left;
  border: 0;
  background: transparent;
  color: var(--mc-primary);
  font-size: 14px;
  padding: 10px 18px;
  cursor: pointer;
  border-left: 3px solid transparent;
  transition: background 0.12s, border-color 0.12s;
}

.mcalc__list-item:hover {
  background: var(--mc-primary-l);
}

.mcalc__list-item.is-active {
  background: var(--mc-primary-l2);
  border-left-color: var(--mc-primary);
  font-weight: 700;
}

/* ---------- Центр: заголовок + схема ---------- */
.mcalc__center {
  padding: 20px 24px;
}

.mcalc__center-title {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 16px;
  color: var(--mc-text);
}

.mcalc__figure {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 240px;
}

.mcalc__figure svg {
  max-width: 100%;
  height: auto;
}

.mcalc__figure-img {
  max-width: 100%;
  max-height: 240px;
  height: auto;
  display: block;
}

.mcalc__hint {
  margin-top: 14px;
  font-size: 13px;
  color: var(--mc-muted);
  line-height: 1.5;
}

/* ---------- Правая колонка: форма ---------- */
.mcalc__form {
  padding: 20px 24px;
  border-right: 0;
}

.mcalc__modes {
  display: flex;
  border: 1px solid var(--mc-border);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 18px;
}

.mcalc__mode {
  flex: 1;
  border: 0;
  background: #fff;
  color: var(--mc-primary);
  font-size: 13px;
  font-weight: 600;
  padding: 9px 6px;
  cursor: pointer;
}

.mcalc__mode.is-active {
  background: var(--mc-primary);
  color: #fff;
}

.mcalc__field {
  margin-bottom: 14px;
}

.mcalc__label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 6px;
}

.mcalc__label small {
  font-weight: 400;
  color: var(--mc-muted);
}

.mcalc__input,
.mcalc__select {
  width: 100%;
  height: 40px;
  border: 1px solid var(--mc-border);
  border-radius: 6px;
  padding: 0 12px;
  font-size: 15px;
  color: var(--mc-text);
  background: #fff;
  outline: none;
  transition: border-color 0.12s;
}

.mcalc__input:focus,
.mcalc__select:focus {
  border-color: var(--mc-primary);
}

.mcalc__btn {
  width: 100%;
  height: 46px;
  border: 0;
  border-radius: 6px;
  background: var(--mc-primary);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  cursor: pointer;
  margin-top: 4px;
  transition: background 0.15s;
}

.mcalc__btn:hover {
  background: var(--mc-primary-d);
}

/* ---------- Низ: результат ---------- */
.mcalc__result {
  background: var(--mc-result-bg);
  border-top: 1px solid var(--mc-border);
  padding: 18px 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 26px;
  align-items: baseline;
}

.mcalc__result-item {
  display: flex;
  flex-direction: column;
}

.mcalc__result-label {
  font-size: 12px;
  color: var(--mc-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.mcalc__result-value {
  font-size: 22px;
  font-weight: 700;
  color: var(--mc-primary);
}

.mcalc__error {
  color: #c0392b;
  font-size: 13px;
  margin: 6px 0 0;
  min-height: 16px;
}

/* ---------- Справочные вкладки ---------- */
.mcalc__ref {
  padding: 22px 26px;
}

.mcalc__ref h3 {
  margin: 0 0 14px;
  font-size: 17px;
  color: var(--mc-text);
}

.mcalc__table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.mcalc__table th,
.mcalc__table td {
  border: 1px solid var(--mc-border);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}

.mcalc__table th {
  background: var(--mc-primary-l);
  font-weight: 700;
}

.mcalc__table tr:nth-child(even) td {
  background: #fafbfc;
}

.mcalc__ref-note {
  margin-top: 14px;
  font-size: 12px;
  color: var(--mc-muted);
  line-height: 1.5;
}

.mcalc__ref-sub {
  margin: 20px 0 8px;
  font-size: 14px;
  color: var(--mc-primary);
  font-weight: 700;
}

.mcalc__search {
  width: 100%;
  height: 40px;
  border: 1px solid var(--mc-border);
  border-radius: 6px;
  padding: 0 12px;
  font-size: 14px;
  margin-bottom: 6px;
  outline: none;
}

.mcalc__search:focus {
  border-color: var(--mc-primary);
}

.mcalc__table--grades {
  max-width: 420px;
}

.mcalc__gost-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.mcalc__gost-list li {
  list-style: none;
  margin: 0 0 6px;
  padding: 0 0 0 16px;
  position: relative;
  font-size: 13px;
  line-height: 1.45;
}

.mcalc__gost-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 8px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--mc-primary);
  display: block;
}

.mcalc__gost-list li::marker {
  content: none;
}

.mcalc__gost-list a {
  color: var(--mc-primary);
  text-decoration: none;
}

.mcalc__gost-list a:hover {
  text-decoration: underline;
}

/* ============================================================
   Адаптив
   ============================================================ */
@media (max-width: 900px) {
  .mcalc__grid {
    grid-template-columns: 130px 1fr;
    min-height: 0;
  }

  .mcalc__col--metal {
    grid-column: 1;
    grid-row: 1 / span 3;
  }

  .mcalc__col--sort {
    grid-column: 2;
    border-right: 0;
    border-bottom: 1px solid var(--mc-border);
    max-height: 220px;
    overflow-y: auto;
  }

  .mcalc__center {
    grid-column: 2;
    border-bottom: 1px solid var(--mc-border);
  }

  .mcalc__form {
    grid-column: 2;
  }

  .mcalc__figure {
    min-height: 160px;
  }
}

@media (max-width: 600px) {
  .mcalc__grid {
    grid-template-columns: 1fr;
  }

  .mcalc__col--metal,
  .mcalc__col--sort,
  .mcalc__center,
  .mcalc__form {
    grid-column: 1;
    grid-row: auto;
    border-right: 0;
  }

  .mcalc__col--metal {
    border-bottom: 1px solid var(--mc-border);
  }

  .mcalc__list {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    padding: 6px 12px 12px;
  }

  .mcalc__col--metal .mcalc__list-item,
  .mcalc__col--sort .mcalc__list-item {
    width: auto;
    border: 1px solid var(--mc-border);
    border-radius: 16px;
    padding: 6px 12px;
  }

  .mcalc__col--metal .mcalc__list-item.is-active,
  .mcalc__col--sort .mcalc__list-item.is-active {
    border-color: var(--mc-primary);
  }

  .mcalc__tab {
    flex: 1;
    padding: 13px 8px;
    font-size: 11px;
  }

  .mcalc__result {
    gap: 18px;
  }
}

/* ---------- SEO-текст под калькулятором ---------- */
.metal-calc-page-text {
  max-width: 960px;
  margin: 40px auto 0;
  padding: 32px 28px 36px;
  background: #f8fafc;
  border: 1px solid #e1e6ec;
  border-radius: 8px;
  font: 15px/1.65 "Roboto", Arial, Helvetica, sans-serif;
  color: #555;
}

.metal-calc-page-text .text_after_items__title {
  margin: 0 0 20px;
  padding-bottom: 16px;
  border-bottom: 2px solid #1c4f82;
  font: 700 22px/1.35 "Roboto", Arial, sans-serif;
  color: #2b2f33;
}

.metal-calc-page-text__content > p {
  margin: 0 0 14px;
}

.metal-calc-page-text__content > p:last-child {
  margin-bottom: 0;
}

.metal-calc-page-text__h3 {
  margin: 28px 0 14px;
  font: 600 18px/1.4 "Roboto", Arial, sans-serif;
  color: #1c4f82;
}

.metal-calc-page-text__h3:first-of-type {
  margin-top: 8px;
}

.metal-calc-page-text__list {
  margin: 0 0 14px;
  padding: 0 0 0 22px;
  list-style: disc;
}

.metal-calc-page-text__list li {
  margin: 0 0 6px;
  padding-left: 4px;
}

.metal-calc-page-text__list li:last-child {
  margin-bottom: 0;
}

@media (max-width: 767px) {
  .metal-calc-page-text {
    margin-top: 28px;
    padding: 22px 16px 26px;
    font-size: 14px;
    line-height: 1.6;
  }

  .metal-calc-page-text .text_after_items__title {
    font-size: 19px;
    margin-bottom: 16px;
    padding-bottom: 12px;
  }

  .metal-calc-page-text__h3 {
    margin-top: 22px;
    font-size: 16px;
  }
}