/* ==========================================================================
   Componenti riutilizzabili
   ========================================================================== */

/* --- Eyebrow (etichetta piccola sopra un titolo) --- */

.eyebrow {
  display: inline-block;
  font-size: var(--fs-small);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.section--dark .eyebrow {
  color: var(--color-accent);
}

/* --- Accordion generico: icona +/× e pannello a comparsa.
   Riusato da FAQ e dalle card dei case study. Lo stato aperto/chiuso vive
   su un antenato con [data-accordion], attivato via JS aggiungendo .is-open. --- */

.accordion-icon {
  flex: none;
  position: relative;
  width: 1rem;
  height: 1rem;
}

.accordion-icon::before,
.accordion-icon::after {
  content: "";
  position: absolute;
  background: currentColor;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

.accordion-icon::before {
  top: 50%;
  left: 0;
  width: 100%;
  height: 1.5px;
  transform: translateY(-50%);
}

.accordion-icon::after {
  top: 0;
  left: 50%;
  width: 1.5px;
  height: 100%;
  transform: translateX(-50%);
}

.is-open .accordion-icon::after {
  transform: translateX(-50%) rotate(90deg);
  opacity: 0;
}

.accordion-panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.4s var(--ease);
}

.is-open .accordion-panel {
  grid-template-rows: 1fr;
}

.accordion-panel > div {
  overflow: hidden;
}

/* --- Header --- */

.site-header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 50;
  padding-block: var(--space-2);
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--duration) var(--ease), background var(--duration) var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo__img {
  display: block;
  height: 22px;
  width: auto;
}

@media (min-width: 48rem) {
  .logo__img {
    height: 26px;
  }
}

/* --- Bottoni --- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.85em 1.6em;
  font-family: var(--font-body);
  font-size: var(--fs-small);
  font-weight: 500;
  letter-spacing: 0.01em;
  text-decoration: none;
  border-radius: 999px;
  border: 1px solid currentColor;
  transition: transform 0.25s var(--ease), background-color 0.25s var(--ease), color 0.25s var(--ease);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn--accent {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-text);
}

.btn--accent:hover {
  background: color-mix(in srgb, var(--color-accent) 85%, black);
  border-color: color-mix(in srgb, var(--color-accent) 85%, black);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text);
}

.section--dark .btn--ghost {
  color: var(--color-text-inverse);
}

.btn--ghost:hover {
  background: var(--color-text);
  color: var(--color-bg);
}

.section--dark .btn--ghost:hover {
  background: var(--color-text-inverse);
  color: var(--color-bg-inverse);
}

/* --- Footer --- */

.site-footer {
  background: var(--color-bg-inverse);
  color: var(--color-text-inverse-muted);
  border-top: 1px solid var(--color-border-inverse);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding-block: var(--space-3);
  font-size: var(--fs-small);
}

.site-footer__links {
  display: flex;
  gap: var(--space-3);
}

.site-footer__links a {
  text-decoration: none;
  color: var(--color-text-inverse-muted);
  transition: color 0.2s var(--ease);
}

.site-footer__links a:hover {
  color: var(--color-text-inverse);
}

/* --- Scroll cue (hero) --- */

.scroll-cue {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  font-size: var(--fs-small);
  color: var(--color-text-inverse-muted);
  text-decoration: none;
}

.scroll-cue__line {
  width: 1px;
  height: 2.5rem;
  background: currentColor;
  overflow: hidden;
  position: relative;
}

.scroll-cue__line::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--color-accent);
  transform: translateY(-100%);
  animation: scroll-cue-drip 1.8s var(--ease) infinite;
}

@keyframes scroll-cue-drip {
  0% {
    transform: translateY(-100%);
  }
  60%,
  100% {
    transform: translateY(100%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .scroll-cue__line::after {
    animation: none;
    transform: translateY(0);
  }
}