/* HJ Alumínio — Site institucional B2B (Fase 1) */
:root {
  --sj-bg: #ffffff;
  --sj-bg-soft: #f5f5f5;
  --sj-ink: #0a0a0a;
  --sj-muted: #5c5c5c;
  --sj-line: #e6e6e6;
  --sj-blue: #2563eb;
  --sj-blue-dark: #1d4ed8;
  --sj-accent: var(--sj-blue);
  --sj-radius: 14px;
  --sj-max: 1160px;
  --sj-font: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--sj-font);
  color: var(--sj-ink);
  background: var(--sj-bg);
  line-height: 1.55;
}
img { max-width: 100%; display: block; height: auto; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }

.sj-container {
  width: min(100% - 2.5rem, var(--sj-max));
  margin-inline: auto;
}

.sj-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--sj-line);
}
.sj-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 72px;
}
.sj-logo {
  font-weight: 750;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}
.sj-logo span { color: var(--sj-accent, var(--sj-blue)); }
.sj-logo-img { height: 36px; width: auto; display: block; }
.sj-menu {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.92rem;
  font-weight: 550;
  color: var(--sj-muted);
}
.sj-menu a:hover, .sj-menu a.is-active { color: var(--sj-ink); }
.sj-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 44px;
  padding: 0.7rem 1.15rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 650;
  font-size: 0.9rem;
  cursor: pointer;
  transition: .15s ease;
}
.sj-btn-primary {
  background: var(--sj-accent, var(--sj-blue));
  color: #fff !important;
}
.sj-btn-primary:hover { filter: brightness(0.92); }
.sj-btn-ghost {
  background: #fff;
  border-color: var(--sj-line);
  color: var(--sj-ink);
}
.sj-btn-ghost:hover { border-color: #bbb; }

.sj-hero {
  position: relative;
  min-height: min(78vh, 640px);
  display: grid;
  align-items: end;
  background:
    linear-gradient(180deg, rgba(10,10,10,.15), rgba(10,10,10,.62)),
    #111;
  color: #fff;
  overflow: hidden;
}
.sj-hero-media {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(37,99,235,.28), transparent 40%),
    radial-gradient(circle at 80% 0%, rgba(255,255,255,.08), transparent 35%),
    linear-gradient(135deg, #111 0%, #1a1a1a 50%, #0d0d0d 100%);
}
.sj-hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .55;
}
.sj-hero-content {
  position: relative;
  z-index: 1;
  padding: 5.5rem 0 4rem;
  max-width: 720px;
}
.sj-hero h1 {
  margin: 0 0 0.85rem;
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  font-weight: 750;
}
.sj-hero p {
  margin: 0 0 1.5rem;
  color: rgba(255,255,255,.86);
  font-size: 1.05rem;
  max-width: 540px;
}

.sj-section { padding: 4.5rem 0; }
.sj-section-soft { background: var(--sj-bg-soft); }
.sj-eyebrow {
  margin: 0 0 0.55rem;
  color: var(--sj-blue);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.sj-title {
  margin: 0 0 0.75rem;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  letter-spacing: -0.025em;
  line-height: 1.15;
}
.sj-lead {
  margin: 0;
  color: var(--sj-muted);
  max-width: 620px;
  font-size: 1.02rem;
}
.sj-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.1rem;
  margin-top: 2rem;
}
.sj-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}
.sj-card {
  background: #fff;
  border: 1px solid var(--sj-line);
  border-radius: var(--sj-radius);
  padding: 1.25rem;
  box-shadow: 0 8px 24px rgba(0,0,0,.03);
}
.sj-card h3 {
  margin: 0.65rem 0 0.4rem;
  font-size: 1.05rem;
}
.sj-card p {
  margin: 0;
  color: var(--sj-muted);
  font-size: 0.92rem;
}
.sj-card-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: #eff6ff;
  color: var(--sj-blue);
}
.sj-product {
  overflow: hidden;
  padding: 0;
}
.sj-product-cover {
  aspect-ratio: 4/3;
  background: #ececec;
}
.sj-product-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.sj-product-body { padding: 1.1rem 1.15rem 1.25rem; }
.sj-product-cat {
  color: var(--sj-muted);
  font-size: 0.75rem;
  font-weight: 650;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.sj-split {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 2rem;
  align-items: start;
}
.sj-prose p { color: var(--sj-muted); }
.sj-prose h2 { margin-top: 1.75rem; }

.sj-form {
  display: grid;
  gap: 0.85rem;
}
.sj-form label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.82rem;
  font-weight: 650;
  color: #333;
}
.sj-form input,
.sj-form textarea,
.sj-form select {
  width: 100%;
  border: 1px solid #d4d4d4;
  border-radius: 10px;
  padding: 0.75rem 0.85rem;
  font: inherit;
  background: #fff;
}
.sj-form textarea { min-height: 130px; resize: vertical; }
.sj-alert {
  padding: 0.85rem 1rem;
  border-radius: 10px;
  font-size: 0.9rem;
}
.sj-alert-ok { background: #ecfdf5; color: #166534; border: 1px solid #bbf7d0; }
.sj-alert-err { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }

.sj-footer {
  background: #0a0a0a;
  color: rgba(255,255,255,.78);
  padding: 3rem 0 1.5rem;
  margin-top: 2rem;
}
.sj-footer a:hover { color: #fff; }
.sj-footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 1.5rem;
}
.sj-footer h4 {
  margin: 0 0 0.85rem;
  color: #fff;
  font-size: 0.95rem;
}
.sj-footer ul { display: grid; gap: 0.45rem; font-size: 0.9rem; }
.sj-copy {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255,255,255,.1);
  font-size: 0.82rem;
  color: rgba(255,255,255,.55);
}

.sj-page-head {
  padding: 3rem 0 1.5rem;
  border-bottom: 1px solid var(--sj-line);
  margin-bottom: 2rem;
}

.sj-subtitle {
  margin: 0 0 1rem;
  font-size: 1.15rem;
  font-weight: 700;
}

.sj-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}
.sj-filter {
  border: 1px solid var(--sj-line);
  background: #fff;
  color: #444;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  font-size: 0.88rem;
  cursor: pointer;
}
.sj-filter.is-active,
.sj-filter:hover {
  border-color: var(--sj-accent, #1d4ed8);
  color: var(--sj-accent, #1d4ed8);
}

.sj-galeria-item {
  margin: 0;
  border: 1px solid var(--sj-line);
  border-radius: var(--sj-radius);
  overflow: hidden;
  background: #fff;
}
.sj-galeria-thumb {
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  background: #111;
  cursor: zoom-in;
  aspect-ratio: 4/3;
  overflow: hidden;
}
.sj-galeria-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .35s ease;
}
.sj-galeria-thumb:hover img { transform: scale(1.04); }
.sj-galeria-item figcaption {
  padding: 0.85rem 1rem;
  color: #666;
  font-size: 0.88rem;
}

.sj-lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0,0,0,.88);
  display: grid;
  place-items: center;
  padding: 2rem;
}
.sj-lightbox[hidden] { display: none !important; }
.sj-lightbox figure {
  margin: 0;
  max-width: min(960px, 92vw);
  text-align: center;
}
.sj-lightbox img {
  max-width: 100%;
  max-height: 78vh;
  object-fit: contain;
  border-radius: 4px;
}
.sj-lightbox figcaption {
  color: rgba(255,255,255,.85);
  margin-top: 0.75rem;
  font-size: 0.95rem;
}
.sj-lb-close, .sj-lb-prev, .sj-lb-next {
  position: absolute;
  border: 0;
  background: transparent;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  line-height: 1;
  padding: 0.5rem;
}
.sj-lb-close { top: 1rem; right: 1.25rem; }
.sj-lb-prev { left: 1rem; top: 50%; transform: translateY(-50%); }
.sj-lb-next { right: 1rem; top: 50%; transform: translateY(-50%); }

.sj-map {
  border: 1px solid var(--sj-line);
  border-radius: var(--sj-radius);
  overflow: hidden;
  min-height: 280px;
  background: #f0f0f0;
}
.sj-map iframe { width: 100%; height: 320px; border: 0; }

.sj-nav-toggle {
  display: none;
  border: 1px solid var(--sj-line);
  background: #fff;
  width: 42px;
  height: 42px;
  border-radius: 10px;
}

@media (max-width: 960px) {
  .sj-grid-3, .sj-grid-4, .sj-split, .sj-footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 720px) {
  .sj-menu { display: none; }
  .sj-menu.is-open {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    position: absolute;
    left: 0; right: 0; top: 72px;
    background: #fff;
    border-bottom: 1px solid var(--sj-line);
    padding: 1rem 1.25rem 1.25rem;
    gap: 0.85rem;
  }
  .sj-nav-toggle { display: inline-grid; place-items: center; }
  .sj-grid-3, .sj-grid-4, .sj-split, .sj-footer-grid {
    grid-template-columns: 1fr;
  }
  .sj-hero-content { padding: 4.2rem 0 3rem; }
}