/* Sa&Bar Srl — sabarsrl.com
   Fonderia di alluminio dal 1960
   ──────────────────────────── */

/* Google Fonts caricato via <link> nell'HTML per evitare render-blocking */

/* ─── Variables ─── */
:root {
  --black:  #0d0d0d;
  --dark:   #1a1a1a;
  --mid:    #282828;
  --steel:  #3d3d3d;
  --muted:  #6b6b6b;
  --silver: #9a9a9a;
  --border: #e0dbd5;
  --cream:  #f7f4ef;
  --white:  #ffffff;
  --bronze:       #c8722a;
  --bronze-light: #e08840;
  --bronze-dark:  #9a5520;

  --font-display: 'Barlow Condensed', sans-serif;
  --font-body:    'Lora', Georgia, serif;

  --header-h: 110px;
  --max-w:    1200px;
  --section-py: 100px;
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ─── Reset ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  color: var(--dark);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}
img { display: block; width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ─── Typography ─── */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.01em;
  text-transform: uppercase;
}
h1 { font-size: clamp(2.6rem, 6vw, 5.2rem); }
h2 { font-size: clamp(2rem, 4vw, 3.5rem); }
h3 { font-size: clamp(1.5rem, 2.5vw, 2.2rem); }
h4 { font-size: clamp(1.1rem, 2vw, 1.5rem); }
p  { max-width: 68ch; }

/* ─── Layout ─── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 40px;
}

/* ─── Header ─── */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--header-h);
  background: var(--black);
  border-bottom: 1px solid rgba(200,114,42,.3);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 40px;
}
.site-logo {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.9rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--white);
}
.site-logo span { color: var(--bronze); }

.site-nav {
  display: flex;
  align-items: center;
  gap: 0;
}
.site-nav a {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: rgba(255,255,255,.80);
  padding: 8px 13px;
  transition: color .2s var(--ease);
}
.site-nav a:hover, .site-nav a.active { color: var(--bronze); }
.site-nav a.nav-cta {
  background: var(--bronze);
  color: var(--white);
  padding: 8px 18px;
  margin-left: 10px;
  transition: background .2s var(--ease);
}
.site-nav a.nav-cta:hover { background: var(--bronze-light); color: var(--white); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--white); transition: all .3s; }

main { padding-top: var(--header-h); }

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .9rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: 14px 28px;
  border: none;
  cursor: pointer;
  transition: all .25s var(--ease);
}
.btn-primary { background: var(--bronze); color: var(--white); }
.btn-primary:hover { background: var(--bronze-light); transform: translateY(-1px); }
.btn-outline { background: transparent; color: var(--dark); border: 2px solid var(--dark); }
.btn-outline:hover { background: var(--dark); color: var(--white); }
.btn-outline-light { background: transparent; color: var(--white); border: 2px solid rgba(255,255,255,.5); }
.btn-outline-light:hover { background: var(--white); color: var(--dark); }

.link-arrow {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .9rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--bronze);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap .2s var(--ease);
}
.link-arrow:hover { gap: 12px; }

/* ─── Section Label ─── */
.section-label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .72rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--bronze);
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}
.section-label::before {
  content: '';
  display: block;
  width: 32px;
  height: 2px;
  background: var(--bronze);
  flex-shrink: 0;
}

/* ─── Hero ─── */
.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}
#hero-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: .65;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: var(--black);
}
.hero-bg img {
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: .5;
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top,
    rgba(13,13,13,.95) 0%,
    rgba(13,13,13,.4) 55%,
    transparent 100%);
}
.hero-content {
  position: relative;
  z-index: 1;
  padding: 80px 40px;
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
}
.hero-content h1 {
  color: var(--white);
  max-width: 16ch;
  margin-bottom: 8px;
}
.hero-content .hero-subtitle {
  color: rgba(255,255,255,.65);
  font-family: var(--font-display);
  font-size: 2em;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: 28px;
  max-width: 40ch;
}
.hero-content > p {
  color: rgba(255,255,255,.8);
  font-size: 1.05rem;
  margin-bottom: 36px;
  max-width: 56ch;
}
.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 40px;
}
.hero-badge {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .76rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--white);
  background: rgba(200,114,42,.22);
  border: 1px solid rgba(200,114,42,.6);
  padding: 8px 16px;
}

/* ─── Home Sections ─── */
.section-azienda {
  padding: var(--section-py) 0;
}
.azienda-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.azienda-img {
  aspect-ratio: 4/3;
  overflow: hidden;
}
.azienda-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .6s var(--ease);
}
.azienda-img:hover img { transform: scale(1.03); }
.azienda-text h2 { margin-bottom: 20px; }
.azienda-text p { color: var(--steel); margin-bottom: 32px; }

.section-processo {
  padding: var(--section-py) 0;
  background: var(--cream);
}
.processo-images {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 14px;
  margin-bottom: 48px;
}
.processo-images .img-wrap {
  aspect-ratio: 4/3;
  overflow: hidden;
}
.processo-images img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .6s var(--ease);
}
.processo-images .img-wrap:hover img { transform: scale(1.05); }
.processo-text h2 { margin-bottom: 20px; }
.processo-text p { color: var(--steel); margin-bottom: 32px; }

.section-applicazioni {
  padding: var(--section-py) 0;
}
.applicazioni-header { margin-bottom: 40px; }
.applicazioni-header h2 { margin-bottom: 16px; }
.applicazioni-header p { color: var(--steel); }
.applicazioni-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 12px;
  margin-bottom: 40px;
}
.app-thumb {
  aspect-ratio: 1;
  background: var(--cream);
  overflow: hidden;
}
.app-thumb img {
  width: 100%; height: 100%;
  object-fit: contain;
  padding: 16px;
  transition: transform .5s var(--ease);
}
.app-thumb:hover img { transform: scale(1.08); }

.section-qualita {
  padding: var(--section-py) 0;
  background: var(--dark);
  color: var(--white);
}
.qualita-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.qualita-img {
  aspect-ratio: 4/3;
  overflow: hidden;
}
.qualita-img img {
  width: 100%; height: 100%;
  object-fit: cover;
}
.qualita-text h2 { color: var(--white); margin-bottom: 20px; }
.qualita-text p { color: rgba(255,255,255,.72); margin-bottom: 32px; }

.section-compact {
  border-top: 1px solid var(--border);
}
.compact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}
.compact-item {
  padding: 56px 60px;
  border-right: 1px solid var(--border);
  transition: background .25s;
}
.compact-item:last-child { border-right: none; }
.compact-item:hover { background: var(--cream); }
.compact-item h3 { margin-bottom: 12px; }
.compact-item p { color: var(--muted); margin-bottom: 24px; font-size: .95rem; }

/* ─── Page Hero (inner pages) ─── */
.page-hero {
  background: var(--black);
  background-size: cover;
  background-position: center;
  padding: 80px 0 64px;
  position: relative;
  overflow: hidden;
}
.page-hero .section-label { margin-bottom: 16px; }
.page-hero h1 { color: var(--white); margin-bottom: 20px; }
.page-hero .hero-subtitle {
  color: rgba(255,255,255,.65);
  font-family: var(--font-display);
  font-size: 2em;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: 28px;
  max-width: 40ch;
}
.page-hero p {
  color: rgba(255,255,255,.62);
  font-size: 1.1rem;
  max-width: 58ch;
}

/* ─── Stats ─── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 2px;
  background: var(--border);
  margin: 60px 0;
}
.stat-card {
  background: var(--white);
  padding: 44px 32px;
  text-align: center;
}
.stat-value {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.8rem, 5vw, 4.2rem);
  color: var(--bronze);
  display: block;
  line-height: 1;
  margin-bottom: 8px;
}
.stat-label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: .78rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ─── Process Steps ─── */
.process-steps { padding: 40px 0 80px; }
.process-step {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  padding: 80px 0;
  border-bottom: 1px solid var(--border);
}
.process-step:last-child { border-bottom: none; }
.process-step.even { direction: rtl; }
.process-step.even > * { direction: ltr; }
.step-number {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 6.5rem;
  line-height: 1;
  color: var(--border);
  margin-bottom: -16px;
  display: block;
}
.process-step h2,
.process-step h3 { font-size: clamp(1.5rem, 2.5vw, 2.2rem); margin-bottom: 16px; }
.process-step p { color: var(--steel); line-height: 1.78; }
.process-step-img {
  aspect-ratio: 4/3;
  overflow: hidden;
}
.process-step-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .6s var(--ease);
}
.process-step:hover .process-step-img img { transform: scale(1.03); }

/* ─── Applications ─── */
.app-section {
  padding: 80px 0;
  border-bottom: 1px solid var(--border);
}
.app-section:last-child { border-bottom: none; }
.app-section-header { margin-bottom: 40px; }
.app-section-header h2 { margin-bottom: 16px; }
.app-section-header p { color: var(--steel); max-width: 72ch; }
.app-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px,1fr));
  gap: 10px;
}
.app-gallery-item {
  aspect-ratio: 1;
  background: var(--cream);
  overflow: hidden;
  position: relative;
}
.app-gallery-item img {
  width: 100%; height: 100%;
  object-fit: contain;
  padding: 10px;
  transition: transform .4s var(--ease);
}
.app-gallery-item:hover img { transform: scale(1.06); }
.app-caption {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: rgba(13,13,13,.85);
  color: rgba(255,255,255,.85);
  font-family: var(--font-display);
  font-size: .65rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: 7px 10px;
  transform: translateY(100%);
  transition: transform .3s var(--ease);
}
.app-gallery-item:hover .app-caption { transform: translateY(0); }

.prototipazione-card {
  background: var(--black);
  color: var(--white);
  padding: 60px;
  margin: 60px 0;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 60px;
  align-items: center;
}
.prototipazione-card h2 { color: var(--white); margin-bottom: 16px; }
.prototipazione-card p { color: rgba(255,255,255,.7); max-width: 60ch; margin-bottom: 24px; }
.prototipazione-card .section-label::before { background: var(--bronze); }

/* ─── Quality ─── */
.quality-intro { padding: 80px 0 40px; }
.quality-intro .lead {
  font-size: 1.15rem;
  line-height: 1.85;
  color: var(--steel);
  max-width: 78ch;
}
.certs-row {
  display: grid;
  grid-template-columns: repeat(2,1fr);
  gap: 20px;
  margin: 60px 0;
}
.cert-card {
  border: 2px solid var(--border);
  padding: 40px;
  transition: border-color .25s;
}
.cert-card:hover { border-color: var(--bronze); }
.cert-year {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 3rem;
  color: var(--bronze);
  line-height: 1;
  display: block;
  margin-bottom: 12px;
}
.cert-card h3 { margin-bottom: 10px; font-size: 1.3rem; }
.cert-card p { color: var(--muted); font-size: .93rem; margin-bottom: 24px; }

.controls-grid {
  display: grid;
  grid-template-columns: repeat(2,1fr);
  gap: 2px;
  background: var(--border);
  margin: 60px 0;
}
.control-card {
  background: var(--white);
  padding: 40px;
}
.control-icon {
  width: 46px;
  height: 46px;
  background: var(--bronze);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.3rem;
}
.control-card h3 { font-size: 1.15rem; margin-bottom: 12px; }
.control-card p { color: var(--steel); font-size: .93rem; line-height: 1.7; }

.quality-photos {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: 10px;
  margin: 60px 0;
}
.quality-photos .photo {
  aspect-ratio: 1;
  overflow: hidden;
}
.quality-photos img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .5s var(--ease);
}
.quality-photos .photo:hover img { transform: scale(1.06); }

/* ─── Leghe Table ─── */
.leghe-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  padding: 80px 0;
}
.leghe-intro-img {
  aspect-ratio: 4/3;
  overflow: hidden;
}
.leghe-intro-img img {
  width: 100%; height: 100%;
  object-fit: cover;
}
.leghe-intro-text h2 { margin-bottom: 20px; }
.leghe-intro-text p { color: var(--steel); }

.table-wrap {
  overflow-x: auto;
  margin: 40px 0 80px;
}
.alloys-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .95rem;
}
.alloys-table thead {
  background: var(--dark);
  color: var(--white);
}
.alloys-table th {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  padding: 16px 20px;
  text-align: left;
  white-space: nowrap;
}
.alloys-table tbody tr {
  border-bottom: 1px solid var(--border);
  transition: background .2s;
}
.alloys-table tbody tr:hover { background: var(--cream); }
.alloys-table td {
  padding: 18px 20px;
  vertical-align: top;
  font-family: var(--font-body);
}
.alloys-table td:first-child {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  color: var(--dark);
  white-space: nowrap;
}
.alloys-table td:last-child { white-space: nowrap; }
.btn-pdf {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .72rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--bronze);
  border: 1.5px solid var(--bronze);
  padding: 6px 14px;
  display: inline-block;
  transition: all .2s;
}
.btn-pdf:hover { background: var(--bronze); color: var(--white); }

/* ─── Download ─── */
.download-section { padding: 80px 0; }
.download-cat { margin-bottom: 64px; }
.download-cat h2 { margin-bottom: 32px; padding-bottom: 16px; border-bottom: 2px solid var(--border); }
.download-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  background: var(--border);
}
.download-item {
  background: var(--white);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 28px;
  transition: background .2s;
}
.download-item:hover { background: var(--cream); }
.download-item-info { display: flex; align-items: center; gap: 16px; }
.dl-icon {
  width: 36px;
  height: 36px;
  background: var(--bronze);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: .68rem;
  letter-spacing: .05em;
  color: var(--white);
}
.dl-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
}
.dl-desc { font-size: .83rem; color: var(--muted); margin-top: 2px; }

/* ─── Contact ─── */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  padding: 80px 0;
}
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .72rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 13px 16px;
  border: 1.5px solid var(--border);
  background: var(--white);
  font-family: var(--font-body);
  font-size: .95rem;
  color: var(--dark);
  outline: none;
  transition: border-color .2s;
  border-radius: 0;
  appearance: none;
}
.form-group input:focus,
.form-group textarea:focus { border-color: var(--bronze); }
.form-group textarea { min-height: 140px; resize: vertical; }
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.file-upload-area {
  border: 2px dashed var(--border);
  padding: 28px;
  text-align: center;
  cursor: pointer;
  transition: border-color .2s, background .2s;
}
.file-upload-area:hover { border-color: var(--bronze); background: var(--cream); }
.file-upload-area input[type="file"] { display: none; }
.file-label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: .82rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
  cursor: pointer;
}
.file-label span { color: var(--bronze); }

.contact-info-block { }
.info-item {
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}
.info-item:first-child { padding-top: 0; }
.info-label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .7rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--bronze);
  margin-bottom: 4px;
}
.info-value { font-size: 1rem; color: var(--dark); }
.map-placeholder {
  margin-top: 36px;
  aspect-ratio: 4/3;
  background: var(--cream);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: .82rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--silver);
}
.map-placeholder svg { opacity: .3; }

/* ─── CTA Banner ─── */
.cta-banner {
  background: var(--bronze);
  padding: 72px 0;
  text-align: center;
}
.cta-banner h2 { color: var(--white); margin-bottom: 14px; }
.cta-banner p {
  color: rgba(255,255,255,.85);
  margin: 0 auto 36px;
  max-width: 52ch;
}

/* ─── Footer ─── */
.site-footer {
  background: var(--black);
  color: rgba(255,255,255,.55);
  padding: 64px 0 40px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 48px;
}
.footer-brand .site-logo { margin-bottom: 16px; font-size: 1.5rem; }
.footer-brand p { font-size: .88rem; line-height: 1.65; max-width: 36ch; }
.footer-col h4 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .7rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--bronze);
  margin-bottom: 16px;
}
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a {
  font-size: .88rem;
  color: rgba(255,255,255,.45);
  transition: color .2s;
}
.footer-col ul li a:hover { color: var(--white); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: .8rem;
}

/* ─── Animations ─── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-up { animation: fadeUp .7s var(--ease) both; }
.delay-1 { animation-delay: .1s; }
.delay-2 { animation-delay: .22s; }
.delay-3 { animation-delay: .38s; }
.delay-4 { animation-delay: .52s; }

/* Subtle grain */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: .018;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 128px;
}

/* ─── Lang Switcher ─── */
.nav-lang { display: none; }
.lang-switcher {
  position: fixed;
  top: 24px;
  right: 24px;
  display: flex;
  gap: 3px;
  background: var(--black);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 6px;
  padding: 3px;
  z-index: 1000;
  box-shadow: 0 2px 16px rgba(0,0,0,.35);
}
.lang-btn {
  background: transparent;
  border: none;
  color: rgba(255,255,255,.45);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .7rem;
  letter-spacing: .12em;
  padding: 6px 11px;
  border-radius: 4px;
  cursor: pointer;
  transition: background .15s, color .15s;
  line-height: 1;
}
.lang-btn[aria-pressed="true"] {
  background: var(--bronze);
  color: var(--white);
}
.lang-btn:hover:not([aria-pressed="true"]) {
  background: rgba(255,255,255,.1);
  color: var(--white);
}

/* ─── Responsive ─── */
@media (max-width: 1024px) {
  .site-nav a { padding: 8px 10px; font-size: .76rem; }
}
@media (max-width: 900px) {
  :root { --section-py: 70px; }
  .azienda-grid,
  .qualita-grid,
  .leghe-intro,
  .process-step { grid-template-columns: 1fr; gap: 36px; }
  .process-step.even { direction: ltr; }
  .prototipazione-card { grid-template-columns: 1fr; gap: 32px; padding: 40px 28px; }
  .controls-grid,
  .certs-row { grid-template-columns: 1fr; }
  .quality-photos { grid-template-columns: repeat(2,1fr); }
  .compact-grid { grid-template-columns: 1fr; }
  .compact-item { border-right: none; border-bottom: 1px solid var(--border); padding: 36px 20px; }
  .compact-item:last-child { border-bottom: none; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}
@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .header-inner { padding: 0 20px; }
  .nav-toggle { display: flex; }
  .site-nav {
    display: none;
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    background: var(--black);
    flex-direction: column;
    align-items: stretch;
    padding: 20px 0 32px;
    border-top: 1px solid rgba(255,255,255,.08);
  }
  .site-nav.open { display: flex; animation: nav-fade-in .12s ease both; }
  @keyframes nav-fade-in { from { opacity: 0; } to { opacity: 1; } }
  .site-nav a { padding: 13px 24px; font-size: .95rem; color: rgba(255,255,255,.9); }
  .site-nav a.nav-cta { margin: 14px 24px 0; text-align: center; }
  .lang-switcher { display: none; }
  .nav-lang {
    display: flex;
    justify-content: center;
    gap: 3px;
    margin: 20px 24px 0;
    padding: 3px;
    background: rgba(255,255,255,.06);
    border: 1px solid rgba(255,255,255,.12);
    border-radius: 6px;
    align-self: center;
  }
  .nav-lang .lang-btn[aria-pressed="true"] {
    background: #EC483B;
    color: var(--white);
  }
  .hero-content { padding: 48px 20px 60px; }
  .processo-images,
  .applicazioni-grid { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; gap: 40px; }
  .form-row { grid-template-columns: 1fr; }
}

/* ─── MODAL BILANCIO SOSTENIBILITÀ ─── */
.sustain-modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.55);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}
.sustain-modal-overlay.open {
  display: flex;
}
.sustain-modal {
  background: var(--bg-primary, #1a1a1a);
  border: 1px solid var(--accent, #c8722a);
  padding: 40px;
  max-width: 480px;
  width: 90%;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.sustain-modal-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 1.3rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--accent, #c8722a);
  margin: 0;
}