:root {
  --bg: #0a0a0a;
  --bg-elevated: #141414;
  --bg-card: #1a1a1a;
  --fg: #f5f5f5;
  --fg-muted: #888;
  --fg-subtle: #555;
  --accent: #00e676;
  --accent-dim: #00c853;
  --accent-glow: rgba(0, 230, 118, 0.15);
  --gradient-start: #00e676;
  --gradient-end: #00bcd4;
  --radius: 12px;
  --radius-sm: 8px;
  --max-width: 1100px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'DM Sans', sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  line-height: 1.15;
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section-tag {
  display: inline-block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

/* === HERO === */

.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 24px 80px;
  overflow: hidden;
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: var(--max-width);
  width: 100%;
}

.hero-badge {
  display: inline-block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid rgba(0, 230, 118, 0.25);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 32px;
  letter-spacing: 0.05em;
}

.hero h1 {
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero h1 .accent {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.lede {
  font-size: 1.2rem;
  color: var(--fg-muted);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}

.stat-number {
  display: block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--fg-muted);
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--fg-subtle);
}

.hero-gradient {
  position: absolute;
  top: -40%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(0, 230, 118, 0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 1;
}

/* === PRODUCTS === */

.products {
  padding: 100px 0;
  background: var(--bg-elevated);
}

.products h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin-bottom: 48px;
  letter-spacing: -0.02em;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid #222;
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: border-color 0.25s, transform 0.25s;
}

.product-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.product-card.featured {
  grid-column: span 3;
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-rows: auto auto;
  align-items: start;
  gap: 0 24px;
  background: linear-gradient(135deg, rgba(0, 230, 118, 0.05), rgba(0, 188, 212, 0.05));
  border-color: rgba(0, 230, 118, 0.2);
  padding: 40px 36px;
}

.product-card.featured .product-icon {
  grid-row: span 2;
  font-size: 2.5rem;
}

.product-card.featured h3 {
  font-size: 1.4rem;
}

.product-card.featured p {
  grid-column: 2;
}

.price-tag {
  grid-column: 3;
  grid-row: 1 / -1;
  align-self: center;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 8px 20px;
  border-radius: 100px;
  white-space: nowrap;
}

.product-icon {
  font-size: 1.8rem;
  margin-bottom: 16px;
}

.product-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.product-card p {
  font-size: 0.9rem;
  color: var(--fg-muted);
  line-height: 1.6;
}

/* === HOW IT WORKS === */

.how-it-works {
  padding: 100px 0;
}

.how-it-works h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin-bottom: 64px;
  letter-spacing: -0.02em;
}

.steps {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.step {
  display: flex;
  align-items: flex-start;
  gap: 32px;
  padding: 40px 0;
  border-bottom: 1px solid #1a1a1a;
}

.step:last-child {
  border-bottom: none;
}

.step-number {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--fg-subtle);
  line-height: 1;
  min-width: 80px;
}

.step-content h3 {
  font-size: 1.3rem;
  margin-bottom: 8px;
}

.step-content p {
  font-size: 1rem;
  color: var(--fg-muted);
  max-width: 480px;
}

/* === WHY === */

.why {
  padding: 100px 0;
  background: var(--bg-elevated);
}

.why h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin-bottom: 48px;
  letter-spacing: -0.02em;
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.why-card {
  background: var(--bg-card);
  border: 1px solid #222;
  border-radius: var(--radius);
  padding: 36px 32px;
  transition: border-color 0.25s;
}

.why-card:hover {
  border-color: #333;
}

.why-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.why-card p {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.7;
}

/* === CLOSING === */

.closing {
  padding: 120px 0;
  text-align: center;
}

.closing-content {
  max-width: 650px;
  margin: 0 auto;
}

.closing h2 {
  font-size: clamp(2rem, 4.5vw, 3rem);
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.closing p {
  font-size: 1.1rem;
  color: var(--fg-muted);
  line-height: 1.8;
}

/* === FOOTER === */

.footer {
  border-top: 1px solid #1a1a1a;
  padding: 60px 0 0;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  gap: 48px;
  flex-wrap: wrap;
}

.footer-logo {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
}

.footer-brand p {
  font-size: 0.85rem;
  color: var(--fg-muted);
  margin-top: 8px;
}

.footer-links {
  display: flex;
  gap: 64px;
}

.footer-col h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fg-muted);
  margin-bottom: 16px;
}

.footer-col p {
  font-size: 0.9rem;
  color: var(--fg-subtle);
  margin-bottom: 8px;
}

.footer-bottom {
  max-width: var(--max-width);
  margin: 48px auto 0;
  padding: 24px 24px;
  border-top: 1px solid #1a1a1a;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: var(--fg-subtle);
}

.footer-link {
  display: block;
  font-size: 0.9rem;
  color: var(--fg-subtle);
  text-decoration: none;
  margin-bottom: 8px;
  transition: color 0.2s;
}

.footer-link:hover {
  color: var(--accent);
}

/* === NAV === */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 10, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid #1a1a1a;
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-size: 0.9rem;
  color: var(--fg-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.nav-link:hover { color: var(--fg); }

.btn-nav-whatsapp {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-glow);
  border: 1px solid rgba(0, 230, 118, 0.25);
  padding: 7px 16px;
  border-radius: 100px;
  text-decoration: none;
  transition: background 0.2s, border-color 0.2s;
}

.btn-nav-whatsapp:hover {
  background: rgba(0, 230, 118, 0.22);
  border-color: rgba(0, 230, 118, 0.4);
}

/* === HERO CTAs === */

.hero-ctas {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.btn-primary-hero {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  color: #0a0a0a;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  padding: 14px 32px;
  border-radius: var(--radius);
  text-decoration: none;
  transition: opacity 0.2s, transform 0.2s;
}

.btn-primary-hero:hover {
  opacity: 0.92;
  transform: translateY(-1px);
}

.btn-secondary-hero {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  color: var(--fg);
  background: var(--bg-card);
  border: 1px solid #333;
  padding: 14px 28px;
  border-radius: var(--radius);
  text-decoration: none;
  transition: border-color 0.2s;
}

.btn-secondary-hero:hover { border-color: #555; }

.wa-icon-sm { width: 18px; height: 18px; color: #25D366; }

/* === CATALOG GRID === */

.cat-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.cat-tab {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--fg-muted);
  background: transparent;
  border: 1px solid #2a2a2a;
  padding: 8px 20px;
  border-radius: 100px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.cat-tab:hover { color: var(--fg); border-color: #444; }

.cat-tab.active {
  color: var(--accent);
  border-color: rgba(0, 230, 118, 0.4);
  background: var(--accent-glow);
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.catalog-card {
  background: var(--bg-card);
  border: 1px solid #222;
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.25s, transform 0.25s;
  display: flex;
  flex-direction: column;
}

.catalog-card:hover {
  border-color: rgba(0, 230, 118, 0.3);
  transform: translateY(-3px);
}

.catalog-img-wrap {
  position: relative;
  aspect-ratio: 4/3;
  background: #111;
  overflow: hidden;
}

.catalog-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.catalog-img-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: #111;
}

.placeholder-icon {
  font-size: 3rem;
}

.grade-chip {
  position: absolute;
  top: 12px;
  left: 12px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 100px;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--fg);
}

.grade-chip.grade-A\\+,
.grade-chip.grade-A {
  background: rgba(0, 230, 118, 0.2);
  border-color: rgba(0, 230, 118, 0.4);
  color: var(--accent);
}

.grade-chip.grade-B {
  background: rgba(0, 188, 212, 0.2);
  border-color: rgba(0, 188, 212, 0.4);
  color: #00bcd4;
}

.grade-chip.grade-C {
  background: rgba(255, 193, 7, 0.2);
  border-color: rgba(255, 193, 7, 0.4);
  color: #ffc107;
}

.catalog-info {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.catalog-meta {
  margin-bottom: 6px;
}

.catalog-cat {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-subtle);
}

.catalog-name {
  font-size: 1rem;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.catalog-desc {
  font-size: 0.85rem;
  color: var(--fg-muted);
  line-height: 1.6;
  flex: 1;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.catalog-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: auto;
}

.catalog-price {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.btn-whatsapp {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  color: #fff;
  background: #25D366;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background 0.2s;
  white-space: nowrap;
}

.btn-whatsapp:hover { background: #1ebe5a; }

.wa-icon { width: 16px; height: 16px; flex-shrink: 0; }

/* === OUT OF STOCK === */

.out-of-stock-section {
  margin-top: 40px;
  padding: 24px 28px;
  background: var(--bg-card);
  border: 1px solid #222;
  border-radius: var(--radius);
}

.oos-label {
  font-size: 0.85rem;
  color: var(--fg-muted);
  margin-bottom: 14px;
}

.oos-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.oos-badge {
  font-size: 0.82rem;
  color: var(--fg-subtle);
  background: #111;
  border: 1px solid #2a2a2a;
  padding: 4px 12px;
  border-radius: 100px;
}

/* === CATALOG EMPTY === */

.catalog-empty {
  padding: 60px 0;
  text-align: center;
}

.catalog-empty p {
  color: var(--fg-muted);
  font-size: 1rem;
}

.catalog-empty a {
  color: var(--accent);
  text-decoration: none;
}

/* === RESPONSIVE === */

@media (max-width: 768px) {
  .hero {
    min-height: auto;
    padding: 80px 20px 60px;
  }

  .hero-stats {
    gap: 20px;
  }

  .stat-divider {
    display: none;
  }

  .product-grid {
    grid-template-columns: 1fr;
  }

  .product-card.featured {
    grid-column: span 1;
    display: flex;
    flex-direction: column;
  }

  .product-card.featured .product-icon {
    font-size: 2rem;
  }

  .price-tag {
    align-self: flex-start;
    margin-top: 12px;
  }

  .step {
    flex-direction: column;
    gap: 12px;
  }

  .step-number {
    font-size: 2.5rem;
    min-width: auto;
  }

  .why-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
  }

  .footer-links {
    gap: 40px;
  }

  .closing {
    padding: 80px 0;
  }

  .products, .how-it-works, .why {
    padding: 70px 0;
  }

  .catalog-grid {
    grid-template-columns: 1fr;
  }

  .hero-ctas {
    flex-direction: column;
    align-items: flex-start;
  }

  .btn-primary-hero, .btn-secondary-hero {
    width: 100%;
    justify-content: center;
  }

  .nav-links {
    gap: 12px;
  }

  .nav-link {
    display: none;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .catalog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}