:root {
  --bg-light: #f5f7f8;
  --bg-dark: #111;
  --text-light: #222;
  --text-dark: #f5f5f5;
  --transition: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-light: #111;
    --text-light: #f5f5f5;
  }
}

body {
  margin: 0;
  padding: 3.5rem 1.5rem;
  background: var(--bg-light);
  color: var(--text-light);
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
}

/* --- Accordion principale --- */
.outer-accordion {
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 950px;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 6px 30px rgba(0, 0, 0, 0.05);
  transition: all var(--transition);
}

/* --- Pannelli esterni --- */
.outer-item {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 1.0rem 1.2rem;
  cursor: pointer;
  background: linear-gradient(to bottom, rgba(255,255,255,0.1), rgba(0,0,0,0.05));
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  transition: all var(--transition);
  transform: scale(0.97);
  opacity: 0.75;
  overflow: hidden;
  border-radius: 12px;
}
.outer-item:last-child {
  border-bottom: none;
}
.outer-item.active {
  transform: scale(1);
  opacity: 1;
  background-color: rgba(255,255,255,0.35);
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  z-index: 2;
}

/* --- Titoli --- */
.outer-item h2,
.outer-item small {
  transition: opacity var(--transition), transform var(--transition);
  opacity: 0.55;
  transform: translateY(8px);
}
.outer-item.active h2,
.outer-item.active small {
  opacity: 1;
  transform: translateY(0);
}
.outer-item h2 {
  font-size: 1.3rem;
  margin: 0.3rem 0 0.8rem;
}
.outer-item small {
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* --- Layout immagine + testo --- */
.panel-body {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
  flex-wrap: wrap;
}

.panel-image {
  flex: 0 0 10%;
  width: 10%;
  max-width: 380px;
  border-radius: 12px;
  object-fit: cover;
  box-shadow: 0 4px 18px rgba(0,0,0,0.12);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.outer-item:hover .panel-image {
  transform: scale(1.02);
  box-shadow: 0 6px 24px rgba(0,0,0,0.15);
}

.panel-text {
  flex: 1;
  min-width: 250px;
}

/* --- Modifica l'ordine: la label sopra al title --- */
.panel-text {
  display: flex;
  flex-direction: column;
}

.panel-text small {
  order: -1; /* Sposta la label sopra il title */
}

/* --- Contenuto del pannello --- */
.outer-item .content {
  height: 0;
  overflow: hidden;
  opacity: 0;
  transform: translateY(-10px);
  transition: height var(--transition), opacity var(--transition), transform var(--transition);
}
.outer-item.active .content {
  opacity: 1;
  transform: translateY(0);
  overflow: visible;
}

.outer-item:not(.active) .inner-content {
  display: none; /* Nascondi solo il contenuto, non l’header */
}
.outer-item:not(.active) .inner-item-header {
  opacity: 0.8;
}


/* --- Accordion interno --- */
.inner-accordion {
  width: 100%;
  border-top: 1px solid rgba(0, 0, 0, 0.08);
  margin-top: 1.2rem;
  padding-top: 0.5rem;
}
.inner-item {
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

/* --- Header sezioni interne --- */
.inner-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.9rem 0.3rem;
  width: 100%;
  font-size: 1.02rem;
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  transition: color var(--transition);
}
.inner-header:hover {
  color: #007aff;
}
.inner-header svg {
  width: 16px;
  height: 16px;
  transition: transform 0.3s ease;
}
.inner-header[aria-expanded="true"] svg {
  transform: rotate(45deg);
}

/* --- Contenuto interno con immagine --- */
.inner-content {
  height: 0;
  overflow: hidden;
  opacity: 0;
  transition: height var(--transition), opacity var(--transition);
  padding: 0 0.5rem 0.8rem 0.5rem;
  line-height: 1.6;
  box-sizing: border-box;
}
.inner-content.open {
  opacity: 1;
}
.inner-content-wrapper {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}
.inner-image {
  flex: 0 0 60px;
  width: 60px;
  height: 60px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.12);
}

/* --- Mobile --- */
@media (max-width: 768px) {
  .panel-body {
    flex-direction: column;
  }
  .panel-image {
    width: 100%;
    max-width: 100%;
  }
  .inner-content-wrapper {
    flex-direction: column;
  }
  .inner-image {
    width: 100%;
    height: auto;
  }
}

/* === INDENTAZIONE ACCORDION ANNIDATI (AGGIUNTA) === */

/* Target the inner-accordion that sits inside inner-content */
.inner-content > .inner-accordion {
  margin-left: 1rem;
  border-left: 2px solid rgba(0, 0, 0, 0.06);
  padding-left: 0.75rem;
  box-sizing: border-box;
}

/* Deeper nesting */
.inner-content > .inner-accordion .inner-content > .inner-accordion {
  margin-left: 2rem;
  border-left-color: rgba(0, 0, 0, 0.04);
}

/* Ensure indentation is visible when content is expanded */
.inner-content[style*="height"] > .inner-accordion,
.inner-content.open > .inner-accordion {
  /* if JS toggles inline height or class 'open' */
  transition: margin-left var(--transition);
}

/* =============== */
/* INDENTAZIONE ACCORDION ANNIDATI */
/* =============== */

.inner-accordion {
  margin-left: 0;
}

.inner-accordion .inner-accordion {
  margin-left: 1rem;
  border-left: 2px solid #e0e0e0;
  padding-left: 0.75rem;
}

.inner-accordion .inner-accordion .inner-accordion {
  margin-left: 2rem;
  border-left: 2px solid #d0d0d0;
  padding-left: 0.75rem;
}

/* === Effetto fade-in per le immagini === */
img {
  opacity: 0;
  transition: opacity 0.3s ease;
}

img.loaded {
  opacity: 1;
}

@@media (min-width: 769px) {
  img {
    opacity: 0;
    filter: blur(6px);
    transform: scale(1.02);
    transition:
      opacity 0.8s ease,
      filter 1s ease,
      transform 1s ease;
  }

  img.loaded {
    opacity: 1;
    filter: blur(0);
    transform: scale(1);
  }
}