:root {
  --revla-yellow: #ffd200;
  --revla-black: #222222;
  --revla-grey: #f5f5f5;
  --revla-dark-grey: #555555;
  --container-width: 1180px;
}

* { box-sizing: border-box; }

html { font-size: 16px; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--revla-black);
  background: #ffffff;
  font-size: 17px;
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }

a:hover, a:visited { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 16px;
  width: 100%;
}

/* Header */

header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: #fff;
  border-bottom: 1px solid #e4e4e4;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 0;
  width: 100%;
}

.logo {
  display: flex;
  align-items: center;
}

.logo-image {
  height: 44px;
  width: auto;
  display: block;
}

.nav-links {
  display: flex;
  gap: 16px;
  font-size: 1rem;
  text-transform: uppercase;
  margin-left: auto;
}

.nav-links a {
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  --link-color: var(--revla-yellow);
}

.nav-links a:hover { border-bottom-color: var(--link-color); }

.nav-toggle {
  display: none;
  border: none;
  background: none;
  font-size: 24px;
}

/* Hero */

.hero {
  background: var(--revla-yellow);
  padding: 32px 0 40px;
}

.hero-inner {
  display: flex;
  gap: 32px;
  align-items: stretch;
  flex-wrap: nowrap;
}

.hero-inner > div {
  flex: 1 1 0;
  min-width: 0;
}

.hero-eyebrow {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.hero-title {
  font-size: clamp(2.2rem, 3.4vw, 3rem);
  margin: 8px 0 10px;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--revla-dark-grey);
  max-width: 520px;
}

.hero-badge {
  display: inline-flex;
  padding: 6px 12px;
  margin-top: 16px;
  border-radius: 999px;
  border: 1px solid rgba(0,0,0,.1);
  background: #fffbe6;
  font-size: 1rem;
}

.hero-right {
  background: #fff;
  border-radius: 14px;
  padding: 18px 20px;
  box-shadow: 0 10px 30px rgba(0,0,0,.12);
}

/* Hero interna */

.hero-linea {
  background: #fff;
  padding: 26px 0 18px;
  border-bottom: 10px solid var(--linea-color, #eee);
}

.hero-linea-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--revla-yellow);
  font-size: .9rem;
  text-transform: uppercase;
}

.hero-linea .hero-title { margin-top: 6px; }

.hero-linea .hero-subtitle { max-width: 720px; }

/* Sections */

section { padding: 34px 0; }

section.alt { background: var(--revla-grey); }

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 22px;
}

.section-title {
  font-size: 1.6rem;
  text-transform: uppercase;
  letter-spacing: .08em;
}

.section-desc {
  font-size: 1.05rem;
  max-width: 720px;
  color: var(--revla-dark-grey);
}

.linea-color-band {
  height: 12px;
  border-radius: 999px;
  background: var(--linea-color, var(--revla-yellow));
  box-shadow: 0 4px 12px rgba(0,0,0,.06);
  margin: 12px 0 24px;
}

/* Linee grid */

.linee-grid {
  display: grid;
  grid-template-columns: repeat(3,minmax(0,1fr));
  gap: 18px;
}

.linea-card {
  background: #fff;
  border-radius: 14px;
  padding: 14px 16px 18px;
  box-shadow: 0 4px 14px rgba(0,0,0,.06);
  display: flex;
  flex-direction: column;
}

.linea-label {
  font-size: .9rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--revla-dark-grey);
}

.linea-name {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 6px 0 4px;
}

.linea-pill {
  display: inline-block;
  font-size: .9rem;
  background: var(--revla-yellow);
  border-radius: 999px;
  padding: 2px 10px;
  margin-top: 6px;
}

/* Prodotti */

.prodotti-grid {
  display: grid;
  grid-template-columns: repeat(2,minmax(0,1fr));
  gap: 22px;
}

.prodotto-card {
  background: #fff;
  border-radius: 14px;
  padding: 14px 16px 18px;
  box-shadow: 0 4px 14px rgba(0,0,0,.06);
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 1rem;
}

.prodotto-head {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.prodotto-image {
  flex: 0 0 90px;
  border-radius: 12px;
  overflow: hidden;
  background: #f6f6f6;
}

.prodotto-title { font-size: 1.2rem; font-weight: 600; }

.prodotto-code { font-size: .95rem; color: var(--revla-dark-grey); }

.prodotto-body { font-size: 1rem; }

.scheda-tecnica {
  font-size: .95rem;
  background: #fafafa;
  border-radius: 10px;
  padding: 8px 10px;
}

.scheda-tecnica-title {
  font-size: .9rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: 4px;
}

.scheda-tecnica ul {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 1rem;
}

.scheda-tecnica li { margin-bottom: 2px; }

.symbol-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}

.symbol-chip {
  font-size: .85rem;
  padding: 3px 8px;
  border-radius: 999px;
  background: #f1f1f1;
}

.prodotto-actions { margin-top: 8px; }

.btn-link {
  display: inline-flex;
  align-items: center;
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid #ddd;
  font-size: .95rem;
  text-transform: uppercase;
  letter-spacing: .06em;
}

.btn-link:hover { border-color: var(--revla-yellow); }

/* Dettaglio prodotto */

.prodotto-layout {
  display: grid;
  grid-template-columns: minmax(0,2fr) minmax(0,1.4fr);
  gap: 26px;
}

.prodotto-main h1 { margin-top: 0; }

.prodotto-side {
  background: #fff;
  border-radius: 14px;
  padding: 14px 16px;
  box-shadow: 0 4px 14px rgba(0,0,0,.06);
  font-size: 1rem;
}

.prodotto-meta-grid {
  display: grid;
  grid-template-columns: repeat(2,minmax(0,1fr));
  gap: 8px;
  font-size: .95rem;
}

/* Simbologia */

.simbologia-grid {
  display: grid;
  grid-template-columns: repeat(3,minmax(0,1fr));
  gap: 14px;
}

.sym-card {
  background: #fff;
  border-radius: 12px;
  padding: 10px 12px;
  box-shadow: 0 3px 8px rgba(0,0,0,.04);
  font-size: .96rem;
}

.sym-code { font-weight: 700; margin-bottom: 4px; }

.sym-cat {
  font-size: .9rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--revla-dark-grey);
  margin-bottom: 3px;
}

/* Footer */

footer {
  background: var(--revla-black);
  color: #fff;
  font-size: .95rem;
  padding: 16px 0;
}

footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

/* Responsive */

@media (max-width:960px) {
  .hero-inner {
    flex-direction: column;
    align-items: center;
  }
  .prodotti-grid { grid-template-columns: 1fr; }
  .linee-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .prodotto-layout { grid-template-columns: 1fr; }
}

@media (max-width:720px) {
  .nav-links {
    display: none;
    position: absolute;
    right: 16px;
    top: 52px;
    flex-direction: column;
    background: #fff;
    padding: 10px 16px;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,.18);
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .linee-grid { grid-template-columns: 1fr; }
  .simbologia-grid { grid-template-columns: 1fr; }
}