.ka39-calc {
  margin: 24px auto 48px;
  box-sizing: border-box;
  width: 100%;
  max-width: 100%;
  padding: 32px;
  border-radius: 24px;
  background: linear-gradient(135deg, #ffffff 0%, #f6f7fb 100%);
  box-shadow: 0 18px 60px rgba(20, 20, 20, 0.12);
}

.ka39-calc *,
.ka39-calc *::before,
.ka39-calc *::after {
  box-sizing: border-box;
}

.ka39-calc__head {
  margin-bottom: 24px;
}

.ka39-calc__eyebrow {
  margin: 0 0 10px;
  color: #ed2523;
  font-size: 12px;
  line-height: 1;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.ka39-calc__title {
  margin: 0 0 10px;
  font-size: 36px;
  line-height: 1.1;
}

.ka39-calc__subtitle {
  margin: 0;
  max-width: 760px;
  color: #676768;
  line-height: 1.5;
}

.ka39-calc__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.ka39-calc__chip {
  min-height: 48px;
  padding: 0 18px;
  border: 1px solid #d9dce7;
  border-radius: 999px;
  background: #fff;
  color: #3f3f40;
  font: inherit;
  cursor: pointer;
  transition: 0.2s ease;
}

.ka39-calc__chip:hover,
.ka39-calc__chip.active {
  border-color: #ed2523;
  background: #ed2523;
  color: #fff;
}

.ka39-calc__layout {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(320px, 0.9fr);
  gap: 24px;
  min-width: 0;
}

.ka39-calc__panel,
.ka39-calc__result {
  min-width: 0;
  max-width: 100%;
  padding: 24px;
  border-radius: 20px;
  background: #fff;
  border: 1px solid #eceef5;
}

.ka39-calc__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  min-width: 0;
}

.ka39-calc__field {
  display: block;
  min-width: 0;
  max-width: 100%;
}

.ka39-calc__field + .ka39-calc__field {
  margin-top: 0;
}

.ka39-calc__label {
  display: block;
  margin-bottom: 8px;
  color: #676768;
  font-size: 14px;
  line-height: 1.3;
}

.ka39-calc__select {
  width: 100%;
  max-width: 100%;
  height: 56px;
  padding: 0 16px;
  border: 1px solid #d9dce7;
  border-radius: 16px;
  background: #fff;
  font: inherit;
  color: #3f3f40;
}

.ka39-calc__color-grid {
  display: flex;
  gap: 14px;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  overflow-x: auto;
  padding: 8px 14px 14px;
  overscroll-behavior-x: contain;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: auto;
  scrollbar-color: #b8c0d0 #eef1f7;
}

.ka39-calc__color-grid::-webkit-scrollbar {
  height: 12px;
}

.ka39-calc__color-grid::-webkit-scrollbar-thumb {
  background: #b8c0d0;
  border-radius: 999px;
  border: 2px solid #eef1f7;
}

.ka39-calc__color-grid::-webkit-scrollbar-track {
  background: #eef1f7;
  border-radius: 999px;
}

.ka39-calc__color-grid.is-draggable {
  cursor: grab;
}

.ka39-calc__color-grid.is-dragging {
  cursor: grabbing;
  user-select: none;
}

.ka39-calc__color-card {
  flex: 0 0 calc((100% - 56px) / 5);
  display: flex;
  flex-direction: column;
  width: calc((100% - 56px) / 5);
  min-width: 0;
  box-sizing: border-box;
  padding: 10px;
  border: 1px solid #d9dce7;
  border-radius: 18px;
  background: #fff;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.ka39-calc__color-card:hover,
.ka39-calc__color-card.active {
  border-color: #ed2523;
  box-shadow: 0 12px 28px rgba(237, 37, 35, 0.12);
  transform: translateY(-2px);
}

.ka39-calc__color-photo {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1 / 1;
  border-radius: 14px;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  background-color: #f2f3f7;
}

.ka39-calc__color-photo--placeholder {
  background-image: linear-gradient(135deg, #f3f4f8 0%, #e5e8ef 100%);
  color: #7a7c86;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.ka39-calc__color-title {
  display: block;
  margin-top: 12px;
  color: #141414;
  line-height: 1.4;
}

.ka39-calc__check {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 18px;
  color: #3f3f40;
  line-height: 1.4;
}

.ka39-calc__check input {
  width: 18px;
  height: 18px;
  accent-color: #ed2523;
}

.ka39-calc__free {
  margin-top: 24px;
  padding: 18px 20px;
  border-radius: 18px;
  background: #141414;
  color: #fff;
}

.ka39-calc__free-title {
  margin-bottom: 10px;
  color: #ed2523;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.ka39-calc__free-list {
  margin: 0;
  padding-left: 18px;
  line-height: 1.6;
}

.ka39-calc__result {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.ka39-calc__result-top {
  padding-bottom: 18px;
  border-bottom: 1px solid #eceef5;
}

.ka39-calc__result-label {
  margin-bottom: 8px;
  color: #676768;
  line-height: 1.3;
}

.ka39-calc__result-total {
  font-size: 40px;
  line-height: 1;
  color: #141414;
}

.ka39-calc__result-note {
  min-height: 24px;
  color: #676768;
  line-height: 1.5;
}

.ka39-calc__result-note.is-warning {
  color: #ed2523;
}

.ka39-calc__result-line {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid #f0f1f6;
  line-height: 1.4;
}

.ka39-calc__result-line:last-child {
  border-bottom: 0;
}

.ka39-calc__result-line strong {
  color: #141414;
  white-space: nowrap;
}

.ka39-calc__toggle-field.is-hidden {
  display: none;
}

.ka39-calc__works {
  margin-top: 24px;
  margin-bottom: 40px;
  padding: 28px;
  border-radius: 24px;
  background: #141414;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.ka39-calc__works-head {
  margin-bottom: 20px;
}

.ka39-calc__works-title {
  margin: 0;
  font-size: 28px;
  line-height: 1.15;
  color: #fff;
}

.ka39-calc__works-list {
  display: grid;
  gap: 18px;
}

.ka39-calc__work-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.95fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: 14px;
  padding: 14px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.ka39-calc__work-media {
  display: block;
  overflow: hidden;
  border-radius: 16px;
  text-decoration: none;
  background: #1d1d1d;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.ka39-calc__work-media:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.3);
}

.ka39-calc__work-photo {
  display: block;
  aspect-ratio: 4 / 3;
  min-height: 200px;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}

.ka39-calc__work-description {
  display: flex;
  min-height: 100%;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.02);
}

.ka39-calc__work-copy {
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
  justify-content: center;
  min-height: 100%;
  padding: 22px 20px;
}

.ka39-calc__work-kicker {
  margin-bottom: 12px;
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.ka39-calc__work-text {
  margin: 0;
  color: rgba(255, 255, 255, 0.74);
  line-height: 1.6;
}

@media (max-width: 991px) {
  .ka39-calc {
    padding: 24px;
  }

  .ka39-calc__layout {
    grid-template-columns: 1fr;
  }

  .ka39-calc__title {
    font-size: 30px;
  }

  .ka39-calc__work-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .ka39-calc {
    padding: 18px;
    border-radius: 18px;
  }

  .ka39-calc__panel,
  .ka39-calc__result,
  .ka39-calc__works {
    padding: 18px;
    border-radius: 16px;
  }

  .ka39-calc__grid {
    grid-template-columns: 1fr;
  }

  .ka39-calc__field {
    width: 100%;
  }

  .ka39-calc__title {
    font-size: 26px;
  }

  .ka39-calc__result-total {
    font-size: 32px;
  }

  .ka39-calc__color-grid {
    gap: 10px;
    padding: 6px 6px 12px;
  }

  .ka39-calc__color-card {
    flex-basis: calc((100% - 10px) / 2);
    width: calc((100% - 10px) / 2);
    padding: 8px;
    border-radius: 16px;
  }

  .ka39-calc__color-title {
    margin-top: 10px;
    font-size: 14px;
  }

  .ka39-calc__works-title {
    font-size: 24px;
  }

  .ka39-calc__work-row {
    grid-template-columns: 1fr;
    padding: 12px;
  }

  .ka39-calc__work-photo {
    min-height: 220px;
  }
}