/* =============================================
   FlexBoru – Vanilla CSS Design System
   ============================================= */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* --- CSS Variables --- */
:root {
  --clr-bg:        #040a16;
  --clr-bg-2:      #060e20;
  --clr-bg-3:      #0a1628;
  --clr-gold:      #f5a623;
  --clr-gold-lt:   #fbbf24;
  --clr-gold-dk:   #d97706;
  --clr-steel:     #627d98;
  --clr-steel-lt:  #9fb3c8;
  --clr-steel-dk:  #243b53;
  --clr-white:     #ffffff;
  --clr-green:     #25D366;
  --clr-border:    rgba(255,255,255,0.08);
  --clr-card-bg:   rgba(255,255,255,0.03);
  --font-primary:  'Inter', sans-serif;
  --font-display:  'Space Grotesk', sans-serif;
  --radius-sm:     8px;
  --radius-md:     14px;
  --radius-lg:     20px;
  --radius-xl:     28px;
  --shadow-gold:   0 8px 40px rgba(245,166,35,0.18);
  --shadow-card:   0 4px 24px rgba(0,0,0,0.4);
  --transition:    0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-primary);
  background: var(--clr-bg);
  color: var(--clr-white);
  overflow-x: hidden;
  line-height: 1.6;
}
a { text-decoration: none; color: inherit; }
img { display: block; max-width: 100%; }
ul { list-style: none; }

/* =============================================
   NAVBAR
   ============================================= */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 1.2rem 2rem;
  display: flex; align-items: center; justify-content: space-between;
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
}
.navbar.scrolled {
  background: rgba(4,10,22,0.97);
  box-shadow: 0 2px 32px rgba(0,0,0,0.6);
  padding: 0.8rem 2rem;
  backdrop-filter: blur(12px);
}
.nav-logo { display: flex; align-items: center; gap: 12px; }
.nav-logo-icon {
  width: 42px; height: 42px; border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--clr-gold), var(--clr-gold-dk));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; color: var(--clr-bg); box-shadow: var(--shadow-gold);
}
.nav-logo-text { line-height: 1.1; }
.nav-logo-text .brand { font-family: var(--font-display); font-size: 1.35rem; font-weight: 700; }
.nav-logo-text .brand span { color: var(--clr-gold); }
.nav-logo-text small { font-size: 0.6rem; color: var(--clr-steel-lt); letter-spacing: 0.12em; text-transform: uppercase; display: block; }
.nav-links { display: flex; align-items: center; gap: 2.2rem; }
.nav-links a { font-size: 0.88rem; font-weight: 500; color: var(--clr-steel-lt); transition: color var(--transition); }
.nav-links a:hover { color: var(--clr-gold); }
.nav-cta {
  display: flex; align-items: center; gap: 8px;
  background: linear-gradient(135deg, var(--clr-gold), var(--clr-gold-dk));
  color: var(--clr-bg); font-weight: 700; font-size: 0.85rem;
  padding: 0.6rem 1.4rem; border-radius: 50px;
  box-shadow: var(--shadow-gold);
  transition: transform var(--transition), box-shadow var(--transition);
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 12px 40px rgba(245,166,35,0.4); }
.hamburger { display: none; font-size: 1.4rem; color: var(--clr-gold); cursor: pointer; background: none; border: none; }
.mobile-menu {
  display: none; position: fixed; top: 70px; left: 0; right: 0; z-index: 999;
  background: rgba(6,14,32,0.98); backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--clr-border);
  flex-direction: column; gap: 0;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  padding: 1rem 2rem; font-size: 0.95rem; font-weight: 500;
  border-bottom: 1px solid var(--clr-border);
  color: var(--clr-steel-lt); transition: color var(--transition), background var(--transition);
}
.mobile-menu a:hover { color: var(--clr-gold); background: rgba(245,166,35,0.05); }
.mobile-menu a.cta-mobile {
  background: linear-gradient(135deg, var(--clr-gold), var(--clr-gold-dk));
  color: var(--clr-bg); font-weight: 700; border: none; text-align: center;
}

/* =============================================
   HERO
   ============================================= */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background-image: url('hero.png');
  background-size: cover; background-position: center;
  transform: scale(1.06);
  transition: transform 8s ease;
}
.hero-bg.loaded { transform: scale(1); }
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(
    105deg,
    rgba(4,10,22,0.96) 0%,
    rgba(4,10,22,0.82) 45%,
    rgba(4,10,22,0.60) 100%
  );
}
.hero-noise {
  position: absolute; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  opacity: 0.4;
}
#particles-canvas { position: absolute; inset: 0; pointer-events: none; }
.hero-content {
  position: relative; z-index: 10;
  max-width: 1200px; margin: 0 auto; padding: 8rem 2rem 4rem;
  width: 100%;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(245,166,35,0.12); border: 1px solid rgba(245,166,35,0.3);
  color: var(--clr-gold); font-size: 0.75rem; font-weight: 600;
  padding: 6px 14px; border-radius: 50px; letter-spacing: 0.06em; text-transform: uppercase;
  margin-bottom: 1.6rem;
  animation: fadeSlideUp 0.8s ease both;
}
.hero-badge-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--clr-gold); animation: pulse 2s infinite;
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 7vw, 5.2rem);
  font-weight: 800; line-height: 1.06;
  margin-bottom: 1.4rem; letter-spacing: -0.02em;
  animation: fadeSlideUp 0.8s 0.1s ease both;
}
.hero-title em { color: var(--clr-gold); font-style: normal; }
.hero-title .sub { font-size: clamp(1.4rem, 3vw, 2rem); font-weight: 500; color: var(--clr-steel-lt); display: block; margin-top: 0.3rem; }
.hero-desc {
  font-size: 1.1rem; color: var(--clr-steel-lt); max-width: 520px; line-height: 1.75;
  margin-bottom: 2.4rem;
  animation: fadeSlideUp 0.8s 0.2s ease both;
}
.hero-desc strong { color: var(--clr-white); }
.hero-actions {
  display: flex; flex-wrap: wrap; gap: 1rem; margin-bottom: 3.5rem;
  animation: fadeSlideUp 0.8s 0.3s ease both;
}
.btn-whatsapp {
  display: inline-flex; align-items: center; gap: 10px;
  background: #25D366; color: #fff;
  font-weight: 700; font-size: 0.95rem; padding: 0.85rem 1.8rem;
  border-radius: 50px; box-shadow: 0 6px 28px rgba(37,211,102,0.35);
  transition: transform var(--transition), box-shadow var(--transition);
}
.btn-whatsapp:hover { transform: translateY(-3px); box-shadow: 0 12px 36px rgba(37,211,102,0.5); }
.btn-phone {
  display: inline-flex; align-items: center; gap: 10px;
  background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.15);
  color: #fff; font-weight: 600; font-size: 0.95rem; padding: 0.85rem 1.8rem;
  border-radius: 50px; backdrop-filter: blur(8px);
  transition: transform var(--transition), background var(--transition);
}
.btn-phone:hover { transform: translateY(-3px); background: rgba(255,255,255,0.14); }
.btn-phone i { color: var(--clr-gold); }
.hero-trust {
  display: flex; flex-wrap: wrap; gap: 1.4rem;
  animation: fadeSlideUp 0.8s 0.4s ease both;
}
.trust-item { display: flex; align-items: center; gap: 7px; font-size: 0.82rem; color: var(--clr-steel-lt); }
.trust-item i { color: var(--clr-gold); font-size: 0.85rem; }
.scroll-hint {
  position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  color: var(--clr-steel); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase;
  animation: float 3s ease-in-out infinite;
  z-index: 10;
}
.scroll-hint i { color: var(--clr-gold); }

/* =============================================
   TRUST STRIP
   ============================================= */
.strip {
  background: linear-gradient(90deg, var(--clr-gold-dk), var(--clr-gold), var(--clr-gold-dk));
  padding: 0.75rem 2rem;
  display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem;
  font-size: 0.82rem; font-weight: 700; color: var(--clr-bg);
}
.strip span { display: flex; align-items: center; gap: 6px; }

/* =============================================
   SECTION SHARED
   ============================================= */
.section { padding: 6.5rem 2rem; }
.section-inner { max-width: 1200px; margin: 0 auto; }
.section-tag {
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--clr-gold); margin-bottom: 0.8rem; display: block;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 800;
  line-height: 1.15; letter-spacing: -0.02em; margin-bottom: 1rem;
}
.section-title em { color: var(--clr-gold); font-style: normal; }
.section-sub { font-size: 1rem; color: var(--clr-steel-lt); max-width: 580px; margin: 0 auto; line-height: 1.7; }
.text-center { text-align: center; }
.text-center .section-sub { margin: 0 auto; }

/* =============================================
   PRODUCT CARDS
   ============================================= */
.products-bg { background: var(--clr-bg-2); }
.products-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.4rem;
  margin-top: 3.5rem;
}
.product-card {
  background: var(--clr-card-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg); padding: 1.8rem;
  position: relative; overflow: hidden;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.product-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, transparent, var(--clr-gold), transparent);
  opacity: 0; transition: opacity var(--transition);
}
.product-card:hover { transform: translateY(-6px); border-color: rgba(245,166,35,0.3); box-shadow: var(--shadow-gold); }
.product-card:hover::before { opacity: 1; }
.card-icon-wrap {
  width: 50px; height: 50px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; margin-bottom: 1.2rem;
}
.card-title { font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; margin-bottom: 0.6rem; }
.card-desc { font-size: 0.875rem; color: var(--clr-steel-lt); line-height: 1.65; margin-bottom: 1.2rem; }
.card-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  font-size: 0.72rem; font-weight: 600; padding: 4px 10px; border-radius: 50px;
  border: 1px solid currentColor;
}

/* =============================================
   DN SIZES TABLE
   ============================================= */
.sizes-section { background: var(--clr-bg); }
.sizes-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; margin-top: 3.5rem; }
.sizes-img { border-radius: var(--radius-xl); overflow: hidden; box-shadow: 0 24px 80px rgba(0,0,0,0.5); }
.sizes-img img { width: 100%; height: 420px; object-fit: cover; }
.sizes-table-wrap { overflow-x: auto; }
.sizes-table {
  width: 100%; border-collapse: collapse;
  font-size: 0.875rem;
}
.sizes-table caption {
  font-size: 0.8rem; color: var(--clr-steel-lt); text-align: left;
  margin-bottom: 0.8rem; caption-side: top; padding-bottom: 0.5rem;
}
.sizes-table th {
  text-align: left; padding: 10px 14px;
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--clr-gold); border-bottom: 1px solid var(--clr-border);
}
.sizes-table td {
  padding: 11px 14px; border-bottom: 1px solid rgba(255,255,255,0.05);
  color: var(--clr-steel-lt);
  transition: background var(--transition);
}
.sizes-table tr:hover td { background: rgba(245,166,35,0.04); color: var(--clr-white); }
.sizes-table td:first-child { color: var(--clr-white); font-weight: 600; }
.sizes-note { font-size: 0.78rem; color: var(--clr-steel); margin-top: 1rem; }
.sizes-note i { color: var(--clr-gold); }

/* =============================================
   STEEL GRADES
   ============================================= */
.grades-bg {
  background: var(--clr-bg-3);
  position: relative; overflow: hidden;
}
.grades-bg::before {
  content: '';
  position: absolute; top: -20%; right: -10%; width: 60%; height: 140%;
  background: radial-gradient(ellipse, rgba(245,166,35,0.05) 0%, transparent 70%);
  pointer-events: none;
}
.grades-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.grades-img { border-radius: var(--radius-xl); overflow: hidden; position: relative; }
.grades-img img { width: 100%; height: 440px; object-fit: cover; }
.grades-img-badge {
  position: absolute; bottom: -1px; left: -1px; right: -1px;
  background: linear-gradient(to top, rgba(4,10,22,0.95), transparent);
  padding: 2rem 1.4rem 1.4rem;
  display: flex; gap: 0.7rem; flex-wrap: wrap;
}
.grade-chip {
  background: rgba(245,166,35,0.15); border: 1px solid rgba(245,166,35,0.4);
  color: var(--clr-gold); font-size: 0.78rem; font-weight: 700;
  padding: 5px 12px; border-radius: 50px;
}
.grades-content { display: flex; flex-direction: column; gap: 1.6rem; }
.grade-card {
  background: var(--clr-card-bg); border: 1px solid var(--clr-border);
  border-radius: var(--radius-md); padding: 1.5rem;
  border-left: 3px solid var(--clr-gold);
  transition: transform var(--transition), box-shadow var(--transition);
}
.grade-card:hover { transform: translateX(4px); box-shadow: var(--shadow-gold); }
.grade-name {
  font-family: var(--font-display); font-size: 1.25rem; font-weight: 800;
  color: var(--clr-gold); margin-bottom: 0.4rem;
}
.grade-sub { font-size: 0.8rem; font-weight: 600; color: var(--clr-steel-lt); margin-bottom: 0.7rem; text-transform: uppercase; letter-spacing: 0.06em; }
.grade-desc { font-size: 0.875rem; color: var(--clr-steel-lt); line-height: 1.65; margin-bottom: 0.8rem; }
.grade-props { display: flex; flex-wrap: wrap; gap: 6px; }
.grade-prop {
  font-size: 0.72rem; font-weight: 600; padding: 3px 10px;
  border-radius: 50px; background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1); color: var(--clr-steel-lt);
}

/* =============================================
   WHY US
   ============================================= */
.why-bg { background: var(--clr-bg-2); }
.why-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1.2rem; margin-top: 3.5rem; }
.why-card {
  background: var(--clr-card-bg); border: 1px solid var(--clr-border);
  border-radius: var(--radius-md); padding: 1.6rem;
  transition: transform var(--transition), border-color var(--transition);
}
.why-card:hover { transform: translateY(-5px); border-color: rgba(245,166,35,0.25); }
.why-icon { font-size: 2rem; margin-bottom: 1rem; }
.why-title { font-weight: 700; margin-bottom: 0.5rem; }
.why-desc { font-size: 0.875rem; color: var(--clr-steel-lt); line-height: 1.6; }

/* =============================================
   STATS
   ============================================= */
.stats-section { background: var(--clr-bg-3); }
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem;
  margin-top: 2.5rem;
}
.stat-card {
  text-align: center; padding: 2.2rem 1rem;
  background: var(--clr-card-bg); border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  transition: transform var(--transition), border-color var(--transition);
}
.stat-card:hover { transform: translateY(-5px); border-color: rgba(245,166,35,0.3); }
.stat-number {
  font-family: var(--font-display); font-size: 3rem; font-weight: 800;
  color: var(--clr-gold); line-height: 1; margin-bottom: 0.3rem;
}
.stat-unit { font-size: 1.2rem; font-weight: 700; }
.stat-label { font-size: 0.82rem; color: var(--clr-steel-lt); margin-top: 0.5rem; }

/* =============================================
   CTA BANNER
   ============================================= */
.cta-banner {
  background: linear-gradient(135deg, #1a3a00 0%, #0a5c1e 40%, #1a3a00 100%);
  position: relative; overflow: hidden; padding: 5rem 2rem;
  text-align: center;
}
.cta-banner::before {
  content: ''; position: absolute; inset: 0;
  background: repeating-linear-gradient(45deg,rgba(255,255,255,0.02) 0,rgba(255,255,255,0.02) 1px,transparent 0,transparent 50%);
  background-size: 18px 18px;
}
.cta-banner-inner { position: relative; z-index: 2; max-width: 700px; margin: 0 auto; }
.cta-glow {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
  width: 500px; height: 500px; border-radius: 50%;
  background: radial-gradient(rgba(37,211,102,0.12), transparent 70%);
  pointer-events: none;
}
.cta-title { font-family: var(--font-display); font-size: clamp(1.8rem,4vw,2.8rem); font-weight: 800; margin-bottom: 0.8rem; }
.cta-sub { color: rgba(255,255,255,0.75); margin-bottom: 2rem; font-size: 1.05rem; }
.cta-btns { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 10px;
  background: #25D366; color: #fff; font-weight: 700; font-size: 1rem;
  padding: 0.9rem 2rem; border-radius: 50px;
  box-shadow: 0 8px 32px rgba(37,211,102,0.4);
  transition: transform var(--transition), box-shadow var(--transition);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 16px 48px rgba(37,211,102,0.6); }
.btn-outline {
  display: inline-flex; align-items: center; gap: 10px;
  background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.25);
  color: #fff; font-weight: 600; font-size: 1rem;
  padding: 0.9rem 2rem; border-radius: 50px;
  transition: transform var(--transition), background var(--transition);
}
.btn-outline:hover { transform: translateY(-3px); background: rgba(255,255,255,0.18); }
.btn-outline i { color: var(--clr-gold); }

/* =============================================
   CONTACT
   ============================================= */
.contact-bg { background: var(--clr-bg-2); }
.contact-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.2rem; margin-top: 3rem; }
@media (max-width: 600px) { .contact-cards { grid-template-columns: 1fr; } }
.contact-card {
  background: var(--clr-card-bg); border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg); padding: 2rem; text-align: center;
  transition: transform var(--transition), border-color var(--transition);
  cursor: default;
}
.contact-card:hover { transform: translateY(-5px); border-color: rgba(245,166,35,0.3); }
.contact-icon {
  width: 60px; height: 60px; border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; margin: 0 auto 1.2rem;
}
.contact-card h3 { font-weight: 700; margin-bottom: 0.4rem; }
.contact-card p { font-size: 0.85rem; color: var(--clr-steel-lt); margin-bottom: 0.6rem; }
.contact-card strong { font-weight: 700; font-size: 1rem; }

/* =============================================
   FOOTER
   ============================================= */
footer {
  background: #020710; border-top: 1px solid var(--clr-border);
  padding: 2.5rem 2rem;
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1.2rem;
}
.footer-logo { display: flex; align-items: center; gap: 10px; }
.footer-logo .brand { font-family: var(--font-display); font-weight: 700; font-size: 1.1rem; }
.footer-logo .brand span { color: var(--clr-gold); }
.footer-copy { font-size: 0.8rem; color: var(--clr-steel); text-align: center; }
.footer-wa { display: flex; align-items: center; gap: 8px; color: #25D366; font-size: 0.85rem; font-weight: 600; transition: opacity var(--transition); }
.footer-wa:hover { opacity: 0.8; }

/* =============================================
   FLOATING WA BUTTON
   ============================================= */
.wa-float {
  position: fixed; bottom: 1.8rem; right: 1.8rem; z-index: 1000;
  width: 60px; height: 60px; border-radius: 50%;
  background: #25D366; display: flex; align-items: center; justify-content: center;
  font-size: 1.7rem; color: #fff;
  box-shadow: 0 6px 28px rgba(37,211,102,0.5);
  transition: transform var(--transition), box-shadow var(--transition);
}
.wa-float:hover { transform: scale(1.12); box-shadow: 0 12px 40px rgba(37,211,102,0.7); }
.wa-float-ring {
  position: absolute; inset: 0; border-radius: 50%;
  border: 2px solid rgba(37,211,102,0.5);
  animation: waRing 2.4s cubic-bezier(0.4,0,0.6,1) infinite;
}
@keyframes waRing {
  0%   { transform: scale(1); opacity: 0.8; }
  100% { transform: scale(1.7); opacity: 0; }
}

/* =============================================
   REVEAL ANIMATIONS
   ============================================= */
.reveal {
  opacity: 0; transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible { opacity: 1; transform: none; }
.reveal-left { opacity: 0; transform: translateX(-30px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal-left.visible { opacity: 1; transform: none; }
.reveal-right { opacity: 0; transform: translateX(30px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal-right.visible { opacity: 1; transform: none; }

/* =============================================
   KEYFRAMES
   ============================================= */
@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes pulse {
  0%,100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.5; transform: scale(0.8); }
}
@keyframes float {
  0%,100% { transform: translateX(-50%) translateY(0); }
  50%      { transform: translateX(-50%) translateY(-7px); }
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 900px) {
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: block; }
  .sizes-layout, .grades-layout { grid-template-columns: 1fr; gap: 2.5rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-actions { flex-direction: column; }
  .btn-whatsapp, .btn-phone { justify-content: center; }
  .section { padding: 4.5rem 1.2rem; }
  .cta-banner { padding: 4rem 1.2rem; }
  .cta-btns { flex-direction: column; align-items: center; }
}