/* Калькулятор септика: выбор карточками с картинками, справа — итог.
   Картинки нарисованы на белом фоне, подписи выводятся текстом под ними. */
.skcalc {background: #fff; border: 1px solid #e6ebe2; border-radius: 14px; padding: 24px;}
.skcalc__grid {display: grid; grid-template-columns: 1.35fr 1fr; gap: 28px; align-items: start;}

.skcalc__step {margin-bottom: 26px;}
.skcalc__step:last-child {margin-bottom: 0;}
.skcalc__step-title {display: flex; align-items: center; gap: 10px; margin-bottom: 14px; font-size: 16px; font-weight: 700; color: #2b3a26;}
.skcalc__step-title b {display: inline-flex; align-items: center; justify-content: center; width: 26px; height: 26px; border-radius: 50%; background: #4a7018; color: #fff; font-size: 14px; font-weight: 700;}

/* ─── Карточки с картинками ─────────────────────────────────────────────── */
.skcalc__cards {display: grid; gap: 14px;}
.skcalc__cards--3 {grid-template-columns: repeat(3, 1fr);}
.skcalc__cards--2 {grid-template-columns: repeat(2, 1fr);}
.skcalc__card {display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 12px 10px 14px; border: 2px solid #e6ebe2; border-radius: 14px; background: #fff; cursor: pointer; text-align: center; transition: border-color .3s ease, box-shadow .4s cubic-bezier(.22,.61,.36,1), transform .4s cubic-bezier(.22,.61,.36,1);}
.skcalc__card:hover {border-color: #cfe3ab; transform: translateY(-3px); box-shadow: 0 10px 20px rgba(43, 58, 38, .11);}
.skcalc__card.is-on {border-color: #7cb32f; box-shadow: 0 0 0 3px rgba(124, 179, 47, .16);}
/* Квадрат во всю ширину карточки: в шаге из двух вариантов картинка вырастала
   до 340 px и шаг «Диаметр колец» занимал больше места, чем все остальные
   вместе. Высоту ограничиваем — object-fit: contain держит пропорции. */
.skcalc__card-pic {display: block; width: 100%; aspect-ratio: 1 / 1; max-height: 190px; margin-bottom: 8px; background: #fff; border-radius: 10px; overflow: hidden;}
.skcalc__card-pic img {display: block; width: 100%; height: 100%; object-fit: contain; transition: transform .55s cubic-bezier(.22,.61,.36,1);}
.skcalc__card:hover .skcalc__card-pic img {transform: scale(1.05);}
.skcalc__card-title {font-size: 15px; font-weight: 700; line-height: 1.25; color: #2b3a26;}
.skcalc__card-note {font-size: 13px; line-height: 1.35; color: #5f6a58;}

/* ─── Плитки объёма ─────────────────────────────────────────────────────── */
.skcalc__tiles {display: grid; grid-template-columns: repeat(auto-fill, minmax(122px, 1fr)); gap: 10px;}
.skcalc__tile {display: flex; flex-direction: column; align-items: center; padding: 12px 8px; border: 2px solid #e6ebe2; border-radius: 12px; background: #fff; cursor: pointer; transition: border-color .3s ease, box-shadow .4s cubic-bezier(.22,.61,.36,1);}
.skcalc__tile:hover {border-color: #cfe3ab;}
.skcalc__tile.is-on {border-color: #7cb32f; background: #f6fbef; box-shadow: 0 0 0 3px rgba(124, 179, 47, .14);}
.skcalc__tile-n {font-size: 26px; font-weight: 700; line-height: 1; color: #2b3a26;}
.skcalc__tile-word {margin-top: 2px; font-size: 12px; color: #5f6a58;}
.skcalc__tile-scheme {margin-top: 6px; font-size: 12px; color: #5f6a58;}
.skcalc__tile-price {margin-top: 6px; font-size: 14px; font-weight: 700; color: #4a7018;}
.skcalc__empty {margin: 0; padding: 14px 16px; border-radius: 10px; background: #f4f8f0; font-size: 14px; color: #4a5544;}

/* ─── Траншея ───────────────────────────────────────────────────────────── */
.skcalc__trench {display: grid; grid-template-columns: 120px 1fr; gap: 16px; align-items: center;}
.skcalc__trench-pic {display: block; width: 120px; height: 120px; object-fit: contain;}
.skcalc__trench-val {display: flex; align-items: center; gap: 8px; margin-bottom: 10px; font-size: 15px; color: #4a5544;}
.skcalc__trench-val input {width: 92px; height: 44px; padding: 0 12px; border: 1px solid #d8e0d2; border-radius: 8px; background: #fff; font-size: 16px; font-weight: 700; color: #2b3a26;}
.skcalc__trench-val input:focus {outline: 2px solid #8bc34a; outline-offset: 1px;}
.skcalc__trench-note {margin: 8px 0 0; font-size: 13px; line-height: 1.45; color: #5f6a58;}

/* ☠️ touch-action: none обязателен: иначе палец на ползунке уводит жест
   в прокрутку страницы и на телефоне ползунок «не работает». */
.skcalc__range {width: 100%; height: 28px; margin: 0; background: transparent; touch-action: none; -webkit-appearance: none; appearance: none; cursor: grab;}
.skcalc__range:active {cursor: grabbing;}
.skcalc__range::-webkit-slider-runnable-track {height: 6px; border-radius: 3px; background: #e6ebe2;}
.skcalc__range::-moz-range-track {height: 6px; border-radius: 3px; background: #e6ebe2;}
.skcalc__range::-webkit-slider-thumb {-webkit-appearance: none; appearance: none; width: 26px; height: 26px; margin-top: -10px; border: 3px solid #fff; border-radius: 50%; background: #7cb32f; box-shadow: 0 2px 6px rgba(43, 58, 38, .25);}
.skcalc__range::-moz-range-thumb {width: 26px; height: 26px; border: 3px solid #fff; border-radius: 50%; background: #7cb32f; box-shadow: 0 2px 6px rgba(43, 58, 38, .25);}
.skcalc__range:focus {outline: 0;}
.skcalc__range:focus::-webkit-slider-thumb {box-shadow: 0 0 0 4px rgba(124, 179, 47, .25);}

/* ─── Итог ──────────────────────────────────────────────────────────────── */
.skcalc__result {position: sticky; top: 20px; padding: 20px; border-radius: 12px; background: #f4f8f0;}
.skcalc__sum {padding-bottom: 14px; border-bottom: 1px solid #e2ead9; margin-bottom: 14px;}
.skcalc__sum-label {display: block; font-size: 14px; color: #5f6a58;}
.skcalc__sum-value {display: block; margin-top: 4px; font-size: 32px; font-weight: 700; line-height: 1.1; color: #2b3a26;}
.skcalc__lines {margin: 0 0 12px; padding: 0; list-style: none;}
.skcalc__lines li {display: flex; justify-content: space-between; gap: 12px; padding: 5px 0; font-size: 14px; color: #4a5544; border-bottom: 1px dashed #e2ead9;}
.skcalc__lines li:last-child {border-bottom: 0;}
.skcalc__lines b {white-space: nowrap;}
.skcalc__hint {margin: 0 0 12px; font-size: 14px; color: #4a5544;}
.skcalc__note {margin: 0 0 16px; font-size: 13px; line-height: 1.5; color: #5f6a58;}
.skcalc__btn {display: inline-block; width: 100%; text-align: center;}

@media (max-width: 1199px) {
	.skcalc__grid {grid-template-columns: 1fr; gap: 22px;}
	.skcalc__result {position: static;}
}
@media (max-width: 575px) {
	.skcalc {padding: 16px;}
	.skcalc__cards {gap: 10px;}
	.skcalc__cards--3 {grid-template-columns: repeat(3, 1fr);}
	.skcalc__card {padding: 10px 6px 12px;}
	.skcalc__card-title {font-size: 13px;}
	.skcalc__card-note {font-size: 11px;}
	.skcalc__tiles {grid-template-columns: repeat(auto-fill, minmax(104px, 1fr));}
	.skcalc__trench {grid-template-columns: 84px 1fr; gap: 12px;}
	.skcalc__trench-pic {width: 84px; height: 84px;}
	.skcalc__sum-value {font-size: 26px;}
}

/* Тип, которого нет для выбранного диаметра колец. */
.skcalc__card.is-off {opacity: .38; cursor: not-allowed; filter: grayscale(1);}
.skcalc__card.is-off:hover {border-color: #e6ebe2; transform: none; box-shadow: none;}

/* ─── Калькулятор траншей: цена под названием и переключатели условий ─────── */
.skcalc__card-price {margin-top: 4px; font-size: 14px; font-weight: 700; color: #4a7018;}
.skcalc__opts {display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px;}
.skcalc__opt {display: flex; align-items: flex-start; gap: 10px; padding: 12px 14px; border: 2px solid #e6ebe2; border-radius: 12px; background: #fff; cursor: pointer; text-align: left; transition: border-color .3s ease, background .3s ease;}
.skcalc__opt:hover {border-color: #cfe3ab;}
.skcalc__opt.is-on {border-color: #7cb32f; background: #f6fbef;}
.skcalc__opt-box {flex: 0 0 auto; width: 20px; height: 20px; margin-top: 1px; border: 2px solid #cfd8c6; border-radius: 6px; background: #fff; position: relative; transition: border-color .3s ease, background .3s ease;}
.skcalc__opt.is-on .skcalc__opt-box {border-color: #7cb32f; background: #7cb32f;}
.skcalc__opt.is-on .skcalc__opt-box:after {content: ""; position: absolute; left: 5px; top: 1px; width: 5px; height: 10px; border: solid #fff; border-width: 0 2px 2px 0; transform: rotate(45deg);}
.skcalc__opt-title {display: block; font-size: 14px; font-weight: 700; line-height: 1.3; color: #2b3a26;}
.skcalc__opt-note {display: block; margin-top: 2px; font-size: 13px; color: #5f6a58;}

@media (max-width: 767px) {
	.skcalc__opts {grid-template-columns: 1fr;}
}
.skcalc__trench--nopic {grid-template-columns: 1fr;}

@media (prefers-reduced-motion: reduce) {
	.skcalc__card, .skcalc__card-pic img, .skcalc__tile, .skcalc__opt {transition: none !important;}
	.skcalc__card:hover, .skcalc__card:hover .skcalc__card-pic img {transform: none !important;}
}