/* ============================================
   Proanthenols para Perros — Landing Page
   ============================================ */

:root {
  --purple: #6B21A8;
  --purple-light: #8B5CF6;
  --purple-bg: #FAF5FF;
  --green: #059669;
  --green-light: #D1FAE5;
  --green-bg: #ECFDF5;
  --red: #DC2626;
  --red-light: #FEE2E2;
  --gray-50: #F9FAFB;
  --gray-100: #F3F4F6;
  --gray-200: #E5E7EB;
  --gray-600: #4B5563;
  --gray-700: #374151;
  --gray-800: #1F2937;
  --gray-900: #111827;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 15px rgba(0,0,0,.1), 0 4px 6px rgba(0,0,0,.05);
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--gray-800);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Buttons */
.btn {
  display: inline-block;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all .2s;
  font-size: 15px;
}
.btn-sm { padding: 8px 18px; font-size: 13px; }
.btn-lg { padding: 16px 36px; font-size: 17px; }
.btn-primary {
  background: var(--purple);
  color: #fff;
  padding: 12px 28px;
}
.btn-primary:hover { background: #5B1D91; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-ghost {
  color: var(--gray-700);
  padding: 12px 28px;
  border: 2px solid var(--gray-200);
}
.btn-ghost:hover { border-color: var(--gray-600); }
.btn-block { display: block; text-align: center; width: 100%; }

/* Section shared */
.section-tag {
  display: inline-block;
  background: var(--purple-bg);
  color: var(--purple);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: .5px;
  margin-bottom: 16px;
}

/* ---- NAV ---- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-100);
}
.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 60px;
}
.logo {
  font-weight: 800;
  font-size: 20px;
  color: var(--gray-900);
}
.logo-dot { color: var(--purple); }

/* ---- HERO ---- */
.hero {
  padding: 80px 0 60px;
  background: linear-gradient(165deg, #fff 0%, var(--purple-bg) 100%);
}
.hero-badge {
  display: inline-block;
  background: var(--green-light);
  color: var(--green);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  line-height: 1.15;
  color: var(--gray-900);
  margin-bottom: 20px;
  max-width: 720px;
}
.highlight {
  background: linear-gradient(135deg, var(--purple), var(--purple-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: 18px;
  color: var(--gray-600);
  max-width: 560px;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.hero-stats {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}
.stat { display: flex; flex-direction: column; }
.stat-number {
  font-size: 28px;
  font-weight: 800;
  color: var(--purple);
}
.stat-label {
  font-size: 13px;
  color: var(--gray-600);
}

/* ---- ALERT ---- */
.alert-section { padding: 24px 0; background: #fff; }
.alert-box {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: #FFFBEB;
  border: 1px solid #FDE68A;
  border-radius: var(--radius);
  padding: 18px 22px;
  font-size: 15px;
  line-height: 1.6;
}
.alert-icon { font-size: 22px; flex-shrink: 0; margin-top: 2px; }

/* ---- BENEFITS ---- */
.benefits {
  padding: 80px 0;
  background: var(--gray-50);
}
.benefits h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 40px;
}
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.benefit-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px 24px;
  border: 1px solid var(--gray-100);
  transition: all .2s;
}
.benefit-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  border-color: var(--purple-light);
}
.benefit-icon { font-size: 32px; margin-bottom: 14px; }
.benefit-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}
.benefit-card p {
  font-size: 14px;
  color: var(--gray-600);
  line-height: 1.6;
}

/* ---- SCIENCE ---- */
.science {
  padding: 80px 0;
  background: #fff;
}
.science h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 40px;
}
.studies-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.study-card {
  background: var(--gray-50);
  border-radius: var(--radius);
  padding: 28px 24px;
  border: 1px solid var(--gray-200);
}
.study-year {
  display: inline-block;
  background: var(--purple);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 100px;
  margin-bottom: 14px;
}
.study-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 6px; }
.study-journal { font-size: 13px; color: var(--purple); font-weight: 500; margin-bottom: 12px; }
.study-card > p { font-size: 14px; color: var(--gray-600); margin-bottom: 14px; }
.study-result {
  background: #fff;
  border-radius: var(--radius-sm);
  padding: 14px;
  font-size: 14px;
  border-left: 3px solid var(--green);
  line-height: 1.6;
}
.study-result strong { color: var(--green); }

/* ---- SAFETY ---- */
.safety {
  padding: 80px 0;
  background: var(--gray-50);
}
.safety h2 { font-size: 32px; font-weight: 800; margin-bottom: 12px; }
.section-sub { font-size: 17px; color: var(--gray-600); margin-bottom: 40px; max-width: 600px; }
.safety-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}
.safety-card {
  border-radius: var(--radius);
  padding: 28px 24px;
  border: 2px solid;
}
.safety-no {
  background: var(--red-light);
  border-color: #FCA5A5;
}
.safety-yes {
  background: var(--green-light);
  border-color: #6EE7B7;
}
.safety-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.safety-card p { font-size: 14px; line-height: 1.7; }
.safety-authorities { text-align: center; }
.safety-authorities h3 { font-size: 16px; font-weight: 600; margin-bottom: 16px; color: var(--gray-600); }
.authority-badges { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.badge {
  background: #fff;
  border: 1px solid var(--gray-200);
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  color: var(--gray-700);
}

/* ---- PRODUCT ---- */
.product {
  padding: 80px 0;
  background: #fff;
}
.product h2 { font-size: 32px; font-weight: 800; margin-bottom: 40px; }
.product-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 40px;
  align-items: start;
}
.product-highlight h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.product-highlight p { font-size: 15px; color: var(--gray-600); line-height: 1.7; margin-bottom: 28px; }
.product-details { margin-bottom: 28px; }
.detail-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--gray-100);
  font-size: 14px;
}
.detail-label { color: var(--gray-600); }
.detail-value { font-weight: 600; }
.product-extras h4 { font-size: 15px; font-weight: 600; margin-bottom: 8px; }
.product-extras p { font-size: 14px; color: var(--gray-600); line-height: 1.7; }
.price-card {
  background: var(--purple-bg);
  border: 2px solid #D8B4FE;
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  position: sticky;
  top: 80px;
}
.price-label { display: block; font-size: 14px; font-weight: 600; color: var(--purple); margin-bottom: 8px; }
.price { display: block; font-size: 36px; font-weight: 800; color: var(--gray-900); }
.price-detail { display: block; font-size: 14px; color: var(--gray-600); margin-bottom: 4px; }
.price-asap { display: block; font-size: 14px; color: var(--green); font-weight: 600; margin-bottom: 20px; }
.price-note { display: block; font-size: 12px; color: var(--gray-600); margin-top: 12px; }

/* ---- DOSAGE ---- */
.dosage {
  padding: 80px 0;
  background: var(--gray-50);
}
.dosage h2 { font-size: 32px; font-weight: 800; margin-bottom: 40px; }
.dosage-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.dosage-table-wrapper { overflow-x: auto; }
.dosage-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--gray-200);
}
.dosage-table th {
  background: var(--purple);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  padding: 12px 16px;
  text-align: left;
}
.dosage-table td {
  padding: 12px 16px;
  font-size: 14px;
  border-bottom: 1px solid var(--gray-100);
}
.dosage-table tr:last-child td { border-bottom: none; }
.dosage-tips h3 { font-size: 18px; font-weight: 700; margin-bottom: 16px; }
.dosage-tips ul { list-style: none; }
.dosage-tips li {
  padding: 10px 0;
  padding-left: 24px;
  position: relative;
  font-size: 14px;
  color: var(--gray-600);
  line-height: 1.6;
}
.dosage-tips li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--green);
  font-weight: 700;
}

/* ---- FAQ ---- */
.faq {
  padding: 80px 0;
  background: #fff;
}
.faq h2 { font-size: 32px; font-weight: 800; margin-bottom: 40px; }
.faq-list { max-width: 720px; }
.faq-item {
  border-bottom: 1px solid var(--gray-200);
}
.faq-item summary {
  padding: 20px 0;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq-item summary::after {
  content: "+";
  font-size: 20px;
  color: var(--purple);
  font-weight: 300;
  flex-shrink: 0;
  margin-left: 16px;
}
.faq-item[open] summary::after { content: "−"; }
.faq-answer { padding: 0 0 20px; }
.faq-answer p { font-size: 15px; color: var(--gray-600); line-height: 1.7; }

/* ---- CTA FINAL ---- */
.cta-final {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--purple) 0%, #7C3AED 100%);
  color: #fff;
  text-align: center;
}
.cta-final h2 { font-size: 32px; font-weight: 800; margin-bottom: 16px; }
.cta-final > .container > p { font-size: 17px; opacity: .85; margin-bottom: 32px; }
.cta-final .btn-primary {
  background: #fff;
  color: var(--purple);
  font-size: 17px;
  padding: 16px 36px;
}
.cta-final .btn-primary:hover { background: var(--gray-100); }
.cta-note { font-size: 13px; opacity: .6; margin-top: 16px; }

/* ---- FOOTER ---- */
.footer {
  padding: 48px 0 32px;
  background: var(--gray-900);
  color: var(--gray-200);
}
.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 32px;
}
.footer-logo { font-weight: 800; font-size: 18px; color: #fff; display: block; margin-bottom: 10px; }
.footer-col p { font-size: 14px; line-height: 1.7; opacity: .7; }
.footer-col h4 { font-size: 14px; font-weight: 600; margin-bottom: 12px; color: #fff; }
.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--gray-200);
  text-decoration: none;
  padding: 4px 0;
  opacity: .7;
  transition: opacity .2s;
}
.footer-col a:hover { opacity: 1; }
.footer-disclaimer {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 24px;
}
.footer-disclaimer p { font-size: 12px; line-height: 1.7; opacity: .5; margin-bottom: 8px; }

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  .hero { padding: 48px 0 40px; }
  .hero h1 { font-size: 28px; }
  .hero-sub { font-size: 16px; }
  .hero-stats { gap: 24px; }
  .stat-number { font-size: 22px; }
  .product-layout { grid-template-columns: 1fr; }
  .price-card { position: static; }
  .dosage-content { grid-template-columns: 1fr; }
  .footer-content { grid-template-columns: 1fr; gap: 24px; }
  .safety-grid { grid-template-columns: 1fr; }
  .benefits h2, .science h2, .safety h2, .product h2, .dosage h2, .faq h2 { font-size: 26px; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { text-align: center; }
  .hero-stats { flex-direction: column; gap: 16px; }
}