/* ── Solutions Detail: wallpaper ── */
.sol-detail__bg {
  flex: 1;
  width: 100%;
  min-height: 0;
  margin-top: 1.5rem;
  background-color: var(--surface-low);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  position: relative;
  border-radius: 8px;
  overflow: hidden;
}

/* ── Hint (top-right of image) ── */
.sol-detail__hint {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-family: 'Space Mono', monospace;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--tertiary);
  background: rgba(8, 11, 22, .95);
  padding: 0.4rem 0.75rem;
  border-radius: 4px;
  border: 1px solid rgba(60, 215, 255, .2);
  z-index: 2;
}

/* ── Overlay text (bottom-left of image) ── */
.sol-detail__overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 2rem 2.5rem;
  background: linear-gradient(transparent, rgba(8, 11, 22, .6) 30%, rgba(8, 11, 22, .95));
  z-index: 2;
}

.sol-detail__child-title {
  font-family: 'Rubik', sans-serif;
  font-weight: 700;
  font-size: 2.5rem;
  color: var(--on-surface);
  margin-bottom: 0.4rem;
  text-shadow: 0 2px 8px rgba(0, 0, 0, .7);
}

.sol-detail__child-desc {
  font-size: 1.5rem;
  color: var(--on-surface-variant);
  line-height: 1.5;
  text-shadow: 0 1px 6px rgba(0, 0, 0, .6);
}

.sol-detail__child-desc em {
  font-style: normal;
  color: var(--tertiary);
  font-weight: 600;
}

/* ── Nav: arrows + dots ── */
.sol-detail__nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 0.75rem 0;
  z-index: 2;
}

.sol-detail__arrow {
  background: none;
  border: 1px solid var(--outline-variant);
  border-radius: 50%;
  width: 2rem;
  height: 2rem;
  color: var(--on-surface-variant);
  font-size: 1.25rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color .2s, color .2s;
}

.sol-detail__arrow:hover {
  border-color: var(--tertiary);
  color: var(--tertiary);
}

.sol-detail__dots {
  display: flex;
  gap: 0.4rem;
  align-items: center;
}

.sol-detail__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: none;
  background: var(--outline-variant);
  cursor: pointer;
  padding: 0;
  transition: background .2s, transform .2s;
}

.sol-detail__dot.active {
  background: var(--tertiary);
  transform: scale(1.3);
}

/* ── Tab bar ── */
.sol-detail__tabs {
  display: flex;
  width: 100%;
  background: rgba(255, 255, 255, .06);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: 8px;
  padding: 0.25rem;
  z-index: 2;
}

.sol-detail__tab {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0.5rem 1.25rem;
  font-family: 'Space Mono', monospace;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--on-surface-variant);
  border: none;
  border-radius: 6px;
  background: transparent;
  cursor: pointer;
  transition: color .2s, background .2s;
}

.sol-detail__tab:hover {
  color: var(--on-surface);
  background: rgba(255, 255, 255, .06);
}

.sol-detail__tab.active {
  color: var(--tertiary);
  background: rgba(60, 215, 255, .1);
  box-shadow: 0 0 12px rgba(60, 215, 255, .08);
}

/* ── Tablet ≤ 768px ── */
@media (max-width: 768px) {
  .sol-detail__bg { border-radius: 0; margin-top: 1rem; }
  .sol-detail__overlay { padding: 1.5rem; }
  .sol-detail__child-title { font-size: 1.25rem; }
  .sol-detail__child-desc { font-size: 0.875rem; }
  .sol-detail__nav { padding: 0.5rem 0; }
}

/* ── Mobile ≤ 480px ── */
@media (max-width: 480px) {
  .sol-detail__tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.25rem;
  }

  .sol-detail__tab {
    font-size: 0.6rem;
    padding: 0.6rem 0.5rem;
  }

  .sol-detail__bg { margin-top: 0.75rem; }
  .sol-detail__overlay { padding: 1rem; }
  .sol-detail__child-title { font-size: 1.1rem; }
  .sol-detail__child-desc { font-size: 0.8rem; }
  .sol-detail__arrow { width: 1.75rem; height: 1.75rem; font-size: 1rem; }
  .sol-detail__dot { width: 6px; height: 6px; }
}

/* ── Full HD ≥ 1920px ── */
@media (min-width: 1920px) {
  .sol-detail__child-title { font-size: 3.5rem; }
  .sol-detail__child-desc { font-size: 2rem; }
  .sol-detail__overlay { padding: 2.5rem 3rem; }
}

/* ── Ultrawide ≥ 2560px ── */
@media (min-width: 2560px) {
  .sol-detail__child-title { font-size: 4rem; }
  .sol-detail__child-desc { font-size: 2.25rem; }
  .sol-detail__overlay { padding: 3rem 4rem; }
}