/* ===========================
   Case Study — Stile dedicato
   =========================== */

/* HERO */
.cs-hero {
  padding: 140px 0 60px;
}

.cs-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-head);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-mid);
  margin-bottom: 32px;
  transition: color var(--transition);
}

.cs-back:hover { color: var(--coral); }

.cs-hero__meta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.cs-hero__title {
  font-family: var(--font-head);
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.cs-hero__sub {
  font-size: 1.15rem;
  color: var(--gray-mid);
  max-width: 640px;
  margin-bottom: 48px;
  line-height: 1.7;
}

.cs-hero__info {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--dark);
  border: 2px solid var(--dark);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.cs-info-item {
  background: var(--cream);
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.cs-info-label {
  font-family: var(--font-head);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gray-mid);
}

.cs-info-val {
  font-family: var(--font-head);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--dark);
}

/* COVER */
.cs-cover {
  width: 100%;
  margin-bottom: 80px;
}

.cs-cover__thumb {
  width: 100%;
  height: 480px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-top: 2px solid var(--dark);
  border-bottom: 2px solid var(--dark);
}

/* SEZIONI */
.cs-section {
  padding: 80px 0;
}

.cs-section--dark {
  background: var(--dark);
}

.cs-section--dark .section-label {
  color: rgba(255,255,255,0.4);
}

.cs-section--dark .section-label::before {
  background: var(--gold);
}

.cs-section--dark .cs-section__title {
  color: var(--white);
}

.cs-section__title {
  font-family: var(--font-head);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 800;
  line-height: 1.2;
  margin-top: 12px;
}

.cs-section__title em {
  font-style: normal;
  color: var(--coral);
}

.cs-section__text p {
  color: var(--gray-mid);
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: 16px;
}

/* Grid */
.cs-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

/* Visual placeholder */
.cs-visual-box {
  border-radius: var(--radius-lg);
  border: 2px solid var(--dark);
  aspect-ratio: 4/3;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  font-family: var(--font-head);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-mid);
  text-align: center;
  padding: 24px;
}

/* Lista */
.cs-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 20px;
}

.cs-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--gray-mid);
}

.cs-list li::before {
  content: '→';
  color: var(--coral);
  font-weight: 700;
  flex-shrink: 0;
}

.cs-list--light li { color: rgba(255,255,255,0.6); }
.cs-list--light li::before { color: var(--gold); }

/* Materials grid */
.cs-materials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.cs-material-card {
  border: 2px solid var(--dark);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: transform var(--transition), box-shadow var(--transition);
}

.cs-material-card:hover {
  transform: translateY(-4px);
  box-shadow: 4px 4px 0 var(--dark);
}

.cs-material-icon {
  font-size: 2rem;
  display: block;
  margin-bottom: 14px;
}

.cs-material-card h3 {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.cs-material-card p {
  font-size: 0.88rem;
  color: var(--gray-mid);
  line-height: 1.6;
}

/* Divider */
.cs-divider {
  height: 2px;
  background: var(--dark);
}

/* Risultato */
.cs-result {
  padding: 100px 0;
  background: var(--lavender);
  border-top: 2px solid var(--dark);
  border-bottom: 2px solid var(--dark);
}

.cs-result__inner {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.cs-result__title {
  font-family: var(--font-head);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.2;
  margin: 12px 0 16px;
}

.cs-result__title span { color: var(--coral); }

.cs-result p {
  color: var(--gray-mid);
  font-size: 1rem;
  line-height: 1.7;
}

/* Altri casi */
.cs-more {
  padding: 80px 0;
}

.cs-more__title {
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 40px;
  margin-top: 8px;
}

.cs-more__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* Slider */
.cs-slider {
  position: relative;
  border-radius: var(--radius-md);
  border: 2px solid var(--dark);
  overflow: hidden;
  aspect-ratio: 4/3;
}

.cs-slider__track {
  display: flex;
  height: 100%;
  transition: transform 0.45s cubic-bezier(0.4,0,0.2,1);
}

.cs-slider__track img {
  min-width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 0;
  border: none;
  flex-shrink: 0;
}

.cs-slider__btn {
  position: absolute;
  top: 50%; transform: translateY(-50%);
  background: var(--white);
  border: 2px solid var(--dark);
  border-radius: 50%;
  width: 44px; height: 44px;
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition), color var(--transition);
  z-index: 2;
}

.cs-slider__btn:hover { background: var(--dark); color: var(--white); }
.cs-slider__btn--prev { left: 14px; }
.cs-slider__btn--next { right: 14px; }

.cs-slider__dots {
  position: absolute;
  bottom: 12px; left: 50%; transform: translateX(-50%);
  display: flex; gap: 7px;
}

.cs-slider__dots span {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,0.5);
  border: 1.5px solid var(--dark);
  cursor: pointer;
  transition: background var(--transition);
}

.cs-slider__dots span.active { background: var(--white); }

/* Cover img */
.cs-cover__img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  display: block;
  border-top: 2px solid var(--dark);
  border-bottom: 2px solid var(--dark);
}

/* Image grid */
.cs-img-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.cs-img-grid img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 2px solid var(--dark);
  display: block;
}

.cs-img-grid img:first-child:nth-last-child(1),
.cs-img-grid img:first-child:nth-last-child(3) {
  grid-column: span 2;
}

/* Material card img */
.cs-material-card img {
  width: 100%;
  height: 220px;
  object-fit: contain;
  background: var(--gray-light);
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--gray-light);
  margin-bottom: 16px;
  display: block;
  padding: 8px;
}

/* Before/After compare slider */
.cs-compare {
  position: relative;
  border: 2px solid var(--dark);
  border-radius: var(--radius-md);
  overflow: hidden;
  user-select: none;
  cursor: ew-resize;
  background: var(--white);
  height: 320px;
}

/* Immagine DOPO — base layer */
.cs-compare__img-after {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 24px;
}

/* Immagine PRIMA — sopra, larghezza controllata da JS */
.cs-compare__overlay {
  position: absolute;
  top: 0; left: 0; bottom: 0;
  width: 50%;
  overflow: hidden;
  border-right: 2px solid var(--dark);
  background: var(--white);
}

.cs-compare__overlay img {
  position: absolute;
  top: 0; left: 0;
  width: var(--compare-w, 100%); /* larghezza = larghezza container */
  height: 100%;
  object-fit: contain;
  padding: 24px;
}

/* Handle */
.cs-compare__handle {
  position: absolute;
  top: 0; bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  background: var(--dark);
  z-index: 3;
  pointer-events: none;
}

.cs-compare__knob {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 44px; height: 44px;
  background: var(--white);
  border: 2px solid var(--dark);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  box-shadow: 0 2px 12px rgba(0,0,0,0.15);
}

/* Labels */
.cs-compare__label {
  position: absolute;
  top: 14px;
  font-family: var(--font-head);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 100px;
  border: 1.5px solid var(--dark);
  z-index: 4;
  pointer-events: none;
}

.cs-compare__label--before { left: 14px; background: var(--gray-light); }
.cs-compare__label--after  { right: 14px; background: var(--gold); color: var(--dark); }

/* Responsive */
@media (max-width: 768px) {
  .cs-hero__info { grid-template-columns: repeat(2, 1fr); }
  .cs-grid-2 { grid-template-columns: 1fr; gap: 32px; }
  .cs-materials-grid { grid-template-columns: 1fr; }
  .cs-more__grid { grid-template-columns: 1fr; }
  .cs-cover__img { height: 260px; }
  .cs-img-grid { grid-template-columns: 1fr; }
  .cs-img-grid img:first-child:nth-last-child(3) { grid-column: span 1; }
  .cs-logo-compare { flex-direction: column; }
  .cs-logo-arrow { transform: rotate(90deg); }
  .cs-hero { padding: 110px 0 40px; }
}

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