/* ============================================================
   GLOBAL STYLE — colors, buttons, cards, base typography
   Design direction: Apple-clean + modern B2B manufacturer site
   ============================================================ */

:root {
  --color-charcoal: #1a1a1e;
  --color-charcoal-soft: #2c2c33;
  --color-gray-bg: #f5f5f7;
  --color-border: #e5e5ea;
  --color-accent: #1b56db;      /* professional accent blue — CTA / links */
  --color-accent-dark: #143f9e;
  --color-whatsapp: #25d366;
  --color-whatsapp-dark: #1ebc59;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--color-charcoal);
  -webkit-font-smoothing: antialiased;
}

.text-charcoal { color: var(--color-charcoal); }
.bg-charcoal { background-color: var(--color-charcoal); }
.bg-charcoal-soft { background-color: var(--color-charcoal-soft); }
.bg-surface { background-color: var(--color-gray-bg); }
.text-accent { color: var(--color-accent); }
.bg-accent { background-color: var(--color-accent); }
.border-accent { border-color: var(--color-accent); }

/* ---------- Buttons ---------- */

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  background-color: var(--color-charcoal);
  color: #fff;
  padding: 0.75rem 1.5rem;
  border-radius: 0.6rem;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background-color 0.15s ease, transform 0.15s ease;
}
.btn-primary:hover {
  background-color: var(--color-charcoal-soft);
  transform: translateY(-1px);
}

.btn-accent {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  background-color: var(--color-accent);
  color: #fff;
  padding: 0.75rem 1.5rem;
  border-radius: 0.6rem;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background-color 0.15s ease, transform 0.15s ease;
}
.btn-accent:hover {
  background-color: var(--color-accent-dark);
  transform: translateY(-1px);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  background-color: #fff;
  color: var(--color-charcoal);
  border: 1px solid var(--color-border);
  padding: 0.65rem 1.4rem;
  border-radius: 0.6rem;
  font-weight: 600;
  font-size: 0.9rem;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.btn-outline:hover {
  border-color: var(--color-charcoal);
  transform: translateY(-1px);
}

.btn-whatsapp {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--color-whatsapp);
  color: #fff;
  padding: 0.65rem 1.3rem;
  border-radius: 0.6rem;
  font-weight: 600;
  font-size: 0.9rem;
  transition: background-color 0.15s ease, transform 0.15s ease;
}
.btn-whatsapp:hover {
  background-color: var(--color-whatsapp-dark);
  transform: translateY(-1px);
}

.btn-whatsapp-sm {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--color-whatsapp-dark);
  font-weight: 600;
  font-size: 0.85rem;
}
.btn-whatsapp-sm:hover { text-decoration: underline; }

/* ---------- Nav ---------- */

.nav-link {
  padding: 0.5rem 0.9rem;
  border-radius: 0.5rem;
  font-size: 0.92rem;
  font-weight: 500;
  color: #4b4b52;
  transition: background-color 0.15s ease, color 0.15s ease;
}
.nav-link:hover { background-color: var(--color-gray-bg); color: var(--color-charcoal); }
.nav-link-active { color: var(--color-charcoal); font-weight: 700; }

.footer-link { color: #a8a8b3; font-size: 0.9rem; transition: color 0.15s ease; }
.footer-link:hover { color: #fff; }

/* ---------- Cards ---------- */

.card {
  background-color: #fff;
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  box-shadow: 0 1px 2px rgba(0,0,0,0.03);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}
.card:hover {
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
  transform: translateY(-2px);
}

.badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background-color: var(--color-gray-bg);
  color: var(--color-charcoal-soft);
}

.badge-accent {
  background-color: rgba(27, 86, 219, 0.08);
  color: var(--color-accent);
}

/* ---------- Section spacing helpers ---------- */

.section { padding-top: 5rem; padding-bottom: 5rem; }
.section-sm { padding-top: 3rem; padding-bottom: 3rem; }

/* ---------- Filter buttons (category / series filters) ---------- */

.filter-btn {
  padding: 0.5rem 1.1rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background-color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  color: #4b4b52;
  transition: all 0.15s ease;
}
.filter-btn:hover { border-color: var(--color-charcoal); }
.filter-btn-active {
  background-color: var(--color-charcoal);
  border-color: var(--color-charcoal);
  color: #fff;
}

/* ---------- Placeholder image box ---------- */

.img-placeholder {
  background-color: var(--color-gray-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #b3b3ba;
  border: 1px dashed var(--color-border);
}
.product-thumb { aspect-ratio:1; border-radius:.75rem; overflow:hidden; background:#f7f7f7; padding:.35rem; cursor:pointer; }