/* ============ TIRE KNOWLEDGE (above footer) ============ */
.tire-knowledge {
  background: var(--dark-2);
  padding: 48px 24px 0;
  border-top: 1px solid var(--gray-700);
}

.tire-knowledge__inner {
  max-width: 1360px;
  margin: 0 auto;
}

.tire-knowledge__page {
  display: flex;
  min-height: clamp(480px, 55vw, 620px);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--dark-3);
}

/* —— List panel —— */
.tire-knowledge__list-panel {
  width: 50%;
  max-width: 50%;
  padding: 28px 20px 20px 32px;
  display: flex;
  flex-direction: column;
  background: var(--dark-3);
  position: relative;
  z-index: 5;
}

.tire-knowledge__accent-line {
  width: 40px;
  height: 3px;
  background: var(--gold);
  margin-bottom: 14px;
}

.tire-knowledge__title {
  font-family: var(--f-yekan);
  font-size: 22px;
  font-weight: 900;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 16px;
  line-height: 1;
  letter-spacing: 0.04em;
}

.tire-knowledge__title span {
  color: var(--gold);
}

.tire-knowledge__items {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 6px;
  align-content: start;
  flex: 1;
  overflow-y: auto;
  min-height: 0;
}

.tire-knowledge__items::-webkit-scrollbar {
  width: 3px;
}

.tire-knowledge__items::-webkit-scrollbar-thumb {
  background: var(--gray-500);
  border-radius: 2px;
}

.tire-knowledge__item {
  display: flex;
  align-items: flex-start;
  gap: 7px;
  padding: 16px 2px;
  cursor: pointer;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  user-select: none;
  transition: opacity 0.15s;
}

.tire-knowledge__item:hover {
  opacity: 0.75;
}

.tire-knowledge__item:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.tire-knowledge__num {
  width: 32px;
  height: 32px;
  border-radius: 3px;
  background: var(--dark-4);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--f-num);
  font-size: 16px;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
  transition: background 0.2s;
}

.tire-knowledge__item.is-active .tire-knowledge__num {
  background: var(--gold);
  color: var(--black);
}

.tire-knowledge__label {
  font-family: var(--f-yekan);
  font-size: 15px;
  font-weight: 700;
  color: var(--gray-300);
  line-height: 1.35;
  letter-spacing: 0.02em;
  transition: color 0.2s;
}

.tire-knowledge__item.is-active .tire-knowledge__label {
  color: var(--gold);
}

/* —— Right panel —— */
.tire-knowledge__right-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  background: var(--dark-2);
}

.tire-knowledge__info-strip {
  flex-shrink: 0;
  min-height: 96px;
  background: var(--black);
  border-bottom: 2px solid var(--gold);
  display: flex;
  align-items: center;
  padding: 16px 24px;
  gap: 18px;
  z-index: 10;
}

.tire-knowledge__is-num {
  font-family: var(--f-num);
  font-size: 50px;
  font-weight: 900;
  color: var(--gold);
  line-height: 1;
  flex-shrink: 0;
  min-width: 46px;
  opacity: 0;
  transition: opacity 0.3s;
}

.tire-knowledge__is-divider {
  width: 1px;
  height: 52px;
  background: var(--gray-700);
  flex-shrink: 0;
}

.tire-knowledge__is-body {
  flex: 1;
  opacity: 0;
  transition: opacity 0.3s;
  min-width: 0;
}

.tire-knowledge__is-title {
  font-family: var(--f-yekan);
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.06em;
  margin-bottom: 5px;
}

.tire-knowledge__is-desc {
  font-family: var(--f-peyda);
  font-size: 15px;
  color: var(--gray-300);
  line-height: 1.6;
}

.tire-knowledge__info-strip.is-show .tire-knowledge__is-num,
.tire-knowledge__info-strip.is-show .tire-knowledge__is-body {
  opacity: 1;
}

/* —— Tire area —— */
.tire-knowledge__tire-area {
  flex: 1;
  position: relative;
  overflow: hidden;
  min-height: 280px;
}

.tire-knowledge__tire-part {
  position: absolute;
  bottom: 0;
  right: 0;
  width: min(2300px, 180%);
  height: min(1279px, 140%);
  transform: translate(50%, 50%);
}

.tire-knowledge__tire-pic {
  position: absolute;
  inset: 0;
  transition: transform 0.9s cubic-bezier(0.4, 0, 0.2, 1);
  transform-origin: center center;
  will-change: transform;
}

.tire-knowledge__tire-pic img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  opacity: 0;
  transition: opacity 0.5s;
}

.tire-knowledge__tire-pic img.is-active {
  opacity: 1;
}

.tire-knowledge__line-show {
  position: absolute;
  left: 32%;
  top: -47px;
  transform: translateX(-50%);
  height: 28%;
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 20;
  pointer-events: none;
}

.tire-knowledge__ls-badge {
  width: 32px;
  height: 25px;
  background: var(--gold);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--f-num);
  font-size: 13px;
  font-weight: 700;
  color: var(--black);
  flex-shrink: 0;
}

.tire-knowledge__ls-line {
  width: 2px;
  flex: 1;
  background: var(--gold);
}

.tire-knowledge__ls-dot {
  width: 10px;
  height: 10px;
  background: var(--gold);
  border-radius: 50%;
  border: 2px solid var(--dark-3);
  flex-shrink: 0;
}

@media (max-width: 992px) {
  .tire-knowledge__label {
    font-size: 13px;
  }

  .tire-knowledge__tire-part {
    width: 200%;
    height: 120%;
  }
}

@media (max-width: 768px) {
  .tire-knowledge {
    padding: 32px 16px 0;
  }

  .tire-knowledge__page {
    flex-direction: column;
    min-height: auto;
  }

  .tire-knowledge__list-panel {
    width: 100%;
    max-width: none;
    padding: 20px 16px 12px;
    max-height: 42vh;
  }

  .tire-knowledge__items {
    max-height: calc(42vh - 80px);
  }

  .tire-knowledge__label {
    font-size: 14px;
  }

  .tire-knowledge__right-panel {
    min-height: 320px;
  }

  .tire-knowledge__tire-area {
    min-height: 240px;
  }

  .tire-knowledge__tire-part {
    width: 160%;
    height: 110%;
  }

  .tire-knowledge__is-num {
    font-size: 36px;
  }

  .tire-knowledge__is-title {
    font-size: 16px;
  }

  .tire-knowledge__is-desc {
    font-size: 14px;
  }
}

@media (max-width: 480px) {
  .tire-knowledge__items {
    grid-template-columns: 1fr;
  }

  .tire-knowledge__item {
    padding: 12px 2px;
  }
}