:root {
  --c-bg: #f7f7f5;
  --c-bg-alt: #ffffff;
  --c-ink: #1a1a1a;
  --c-ink-soft: #4a4a4a;
  --c-muted: #7a7a7a;
  --c-line: #e6e6e2;
  --c-accent: #E82326;
  --c-accent-2: #ff5a5d;
  --c-dark: #111111;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.06), 0 2px 8px rgba(0,0,0,.04);
  --shadow-md: 0 10px 30px rgba(0,0,0,.08);
  --maxw: 1180px;
  --gap: clamp(16px, 2.4vw, 28px);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--c-ink);
  background: var(--c-bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: var(--c-ink); text-decoration: none; }
a:hover { color: var(--c-accent); }

h1, h2, h3 {
  font-family: 'Barlow Condensed', 'Inter', sans-serif;
  font-weight: 800;
  letter-spacing: .2px;
  line-height: 1.08;
  margin: 0 0 .5em;
  text-transform: uppercase;
}
h1 { font-size: clamp(2rem, 4.4vw, 3.4rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); }
h3 { font-size: 1.15rem; text-transform: none; letter-spacing: 0; font-family: 'Inter', sans-serif; font-weight: 700; }

p { margin: 0 0 1em; color: var(--c-ink-soft); }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 32px);
}

.eyebrow {
  display: inline-block;
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--c-accent);
  font-size: .82rem;
  margin: 0 0 .75em;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--c-line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 70px;
  gap: var(--gap);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--c-ink);
}
.brand-logo {
  height: 26px;
  width: auto;
  display: block;
}
.brand-tagline {
  font-style: normal;
  font-size: .72rem;
  color: var(--c-muted);
  letter-spacing: 2px;
  text-transform: uppercase;
  border-left: 1px solid var(--c-line);
  padding-left: 10px;
}
@media (max-width: 520px) {
  .brand-tagline { display: none; }
  .brand-logo { height: 22px; }
}

.primary-nav ul {
  list-style: none;
  display: flex;
  gap: clamp(10px, 2vw, 26px);
  margin: 0; padding: 0;
}
.primary-nav a {
  font-weight: 600;
  font-size: .95rem;
  padding: 10px 4px;
  position: relative;
}
.primary-nav a::after {
  content: '';
  position: absolute; left: 4px; right: 4px; bottom: 4px;
  height: 2px; background: var(--c-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s ease;
}
.primary-nav a:hover::after,
.primary-nav a[aria-current="true"]::after { transform: scaleX(1); }

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  border: 1px solid var(--c-line);
  background: #fff;
  border-radius: 10px;
  cursor: pointer;
  padding: 0;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 20px; height: 2px;
  background: var(--c-ink);
  transition: transform .25s ease, opacity .2s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  background:
    radial-gradient(1000px 500px at 80% -10%, rgba(232,35,38,.10), transparent 60%),
    radial-gradient(800px 400px at 10% 110%, rgba(0,0,0,.06), transparent 60%),
    var(--c-bg);
  padding: clamp(48px, 8vw, 96px) 0;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: clamp(24px, 4vw, 56px);
  align-items: center;
}
.hero-copy .lead {
  font-size: 1.12rem;
  color: var(--c-ink-soft);
  max-width: 58ch;
}
.hero-actions {
  display: flex;
  gap: 12px;
  margin: 1.5rem 0 2rem;
  flex-wrap: wrap;
}
.hero-facts {
  list-style: none; padding: 0; margin: 0;
  display: flex;
  gap: clamp(16px, 3vw, 36px);
  flex-wrap: wrap;
  border-top: 1px solid var(--c-line);
  padding-top: 1.25rem;
}
.hero-facts li { display: flex; flex-direction: column; }
.hero-facts strong {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 1.7rem; color: var(--c-ink);
  line-height: 1;
}
.hero-facts span { font-size: .85rem; color: var(--c-muted); }

.hero-visual {
  position: relative;
  max-width: 460px;
  margin-inline: auto;
  width: 100%;
}
.hero-poster {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius);
  box-shadow:
    0 30px 60px rgba(0,0,0,.18),
    0 12px 20px rgba(232,35,38,.12);
  transform: rotate(-2deg);
  transition: transform .4s ease;
}
.hero-poster:hover {
  transform: rotate(0deg) scale(1.02);
}
.ink-red { color: var(--c-accent); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  font-size: .95rem;
  transition: transform .15s ease, background .2s ease, color .2s ease, border-color .2s ease;
}
.btn-primary {
  background: var(--c-accent);
  color: #1a1a1a;
  border-color: var(--c-accent);
}
.btn-primary:hover { background: #c41a1c; border-color: #c41a1c; color: #fff; }
.btn-ghost {
  background: transparent;
  color: var(--c-ink);
  border-color: var(--c-ink);
}
.btn-ghost:hover { background: var(--c-ink); color: #fff; }
.btn:active { transform: translateY(1px); }

/* ---------- Sections ---------- */
.section {
  padding: clamp(56px, 8vw, 96px) 0;
}
.section-alt { background: var(--c-bg-alt); border-block: 1px solid var(--c-line); }

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto clamp(32px, 5vw, 56px);
}
.section-head p { color: var(--c-muted); }

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(24px, 4vw, 64px);
  align-items: start;
}

/* ---------- Features ---------- */
.features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.feature {
  background: var(--c-bg-alt);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 20px;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.feature:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: #dad8d0;
}
.feature-icon {
  display: inline-grid; place-items: center;
  width: 42px; height: 42px;
  background: linear-gradient(135deg, var(--c-accent-2), var(--c-accent));
  border-radius: 10px;
  font-size: 1.2rem;
  margin-bottom: 10px;
}
.feature h3 { margin-bottom: 4px; }
.feature p { font-size: .92rem; margin: 0; }

/* ---------- Cards ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}
.card {
  background: var(--c-bg-alt);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--c-accent);
}
.card-icon {
  width: 48px; height: 48px;
  display: grid; place-items: center;
  background: #f0ede5;
  border-radius: 12px;
  font-size: 1.4rem;
  margin-bottom: 14px;
}
.card h3 { margin-bottom: 6px; }
.card p { font-size: .95rem; margin: 0; }

/* ---------- Categorías (bulonería / ferretería) ---------- */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}
.cat {
  background: var(--c-bg-alt);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 22px 22px 18px;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.cat:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--c-accent);
}
.cat h3 {
  margin-bottom: .6em;
  padding-bottom: .4em;
  border-bottom: 2px solid var(--c-accent);
  display: inline-block;
}
.cat ul {
  list-style: none;
  margin: 0; padding: 0;
  font-size: .93rem;
  color: var(--c-ink-soft);
}
.cat li {
  padding: 4px 0;
  padding-left: 16px;
  position: relative;
}
.cat li::before {
  content: '';
  position: absolute;
  left: 0; top: 12px;
  width: 6px; height: 6px;
  background: var(--c-accent);
  border-radius: 1px;
  transform: rotate(45deg);
}

/* ---------- PDFs ---------- */
.pdfs {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 14px;
}
.pdfs a {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--c-bg-alt);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  transition: transform .15s ease, border-color .2s ease, box-shadow .2s ease;
  color: var(--c-ink);
}
.pdfs a:hover {
  transform: translateY(-2px);
  border-color: var(--c-accent);
  box-shadow: var(--shadow-sm);
  color: var(--c-ink);
}
.pdf-ico {
  flex: none;
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  background: #d3322d;
  color: #fff;
  border-radius: 8px;
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 800;
  font-size: .85rem;
  letter-spacing: 1px;
}
.pdfs strong {
  display: block;
  color: var(--c-ink);
  font-size: .98rem;
  line-height: 1.3;
}
.pdfs em {
  display: block;
  font-style: normal;
  color: var(--c-muted);
  font-size: .82rem;
  margin-top: 2px;
}

/* ---------- Brands ---------- */
.brands {
  list-style: none; padding: 0; margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
}
.brands li {
  background: var(--c-bg-alt);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  aspect-ratio: 2/1;
  display: grid; place-items: center;
  padding: 18px;
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.brands li:hover {
  transform: translateY(-2px);
  border-color: var(--c-accent);
  box-shadow: var(--shadow-sm);
}
.brands img {
  max-width: 100%; max-height: 42px;
  width: auto;
  object-fit: contain;
  filter: grayscale(100%) contrast(.95);
  opacity: .85;
  transition: filter .25s ease, opacity .25s ease;
}
.brands li:hover img { filter: none; opacity: 1; }

/* ---------- Contact ---------- */
.contact-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  display: grid;
  gap: 16px;
}
.contact-list li {
  background: var(--c-bg-alt);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  display: grid;
  gap: 2px;
}
.contact-list strong {
  font-family: 'Barlow Condensed', sans-serif;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--c-ink);
  font-size: .9rem;
}
.contact-list span { color: var(--c-ink-soft); font-size: .95rem; }
.contact-list a { color: var(--c-ink); font-weight: 600; }

.contact-form {
  background: var(--c-bg-alt);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}
.contact-form h3 { margin-bottom: 1rem; }
.field { margin-bottom: 14px; }
.field label {
  display: block;
  font-weight: 600;
  font-size: .88rem;
  margin-bottom: 6px;
  color: var(--c-ink);
}
.field .hint { color: var(--c-muted); font-weight: 400; }
.field input, .field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--c-line);
  background: #fff;
  border-radius: 10px;
  font: inherit;
  color: var(--c-ink);
  transition: border-color .15s ease, box-shadow .15s ease;
}
.field input:focus, .field textarea:focus {
  outline: none;
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px rgba(232,35,38,.18);
}
.field textarea { resize: vertical; min-height: 100px; }
.field.invalid input, .field.invalid textarea {
  border-color: #d3322d;
  box-shadow: 0 0 0 3px rgba(211,50,45,.12);
}
.form-feedback {
  margin: 12px 0 0;
  min-height: 1.2em;
  font-size: .9rem;
}
.form-feedback.ok { color: #1a7d3a; }
.form-feedback.err { color: #d3322d; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--c-dark);
  color: #bdbdbd;
  padding: 28px 0;
  font-size: .9rem;
}
.site-footer p { margin: 0; color: #bdbdbd; }
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
}

/* ---------- Back to top ---------- */
.to-top {
  position: fixed;
  right: 20px; bottom: 20px;
  width: 44px; height: 44px;
  background: var(--c-ink);
  color: #fff;
  display: grid; place-items: center;
  border-radius: 50%;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity .2s ease, transform .2s ease, background .2s ease;
  z-index: 40;
  font-size: 1.1rem;
}
.to-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.to-top:hover { background: var(--c-accent); color: #1a1a1a; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { max-width: 360px; }
  .grid-2 { grid-template-columns: 1fr; }
  .features { grid-template-columns: 1fr; }

  .nav-toggle { display: inline-flex; }
  .primary-nav {
    position: absolute;
    left: 0; right: 0; top: 100%;
    background: #fff;
    border-bottom: 1px solid var(--c-line);
    box-shadow: var(--shadow-md);
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s ease;
  }
  .primary-nav.open { max-height: 420px; }
  .primary-nav ul {
    flex-direction: column;
    padding: 12px 20px 18px;
    gap: 2px;
  }
  .primary-nav a {
    display: block;
    padding: 12px 4px;
    border-bottom: 1px solid var(--c-line);
  }
  .primary-nav li:last-child a { border-bottom: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-bolt { animation: none; }
  * { transition: none !important; }
}