/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --blue: #1f618d;
  --blue-dark: #1a5276;
  --blue-light: #d6eaf8;
  --gold: #d4a017;
  --red: #c0392b;
  --text: #1a1a2e;
  --text-light: #555;
  --white: #ffffff;
  --bg: #f4f8fb;
  --border: #d5e8f0;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
}

/* ===== HEADER / LOGO ===== */
header {
  background: var(--white);
  border-bottom: 2px solid var(--blue);
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 12px rgba(0,0,0,0.07);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-icon { width: 44px; height: 44px; }

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.logo-name {
  font-size: 22px;
  font-weight: 800;
  color: var(--blue-dark);
  letter-spacing: 1px;
  font-variant: small-caps;
}

.logo-tagline {
  font-size: 10px;
  color: var(--gold);
  letter-spacing: 2px;
  text-transform: uppercase;
  font-weight: 600;
}

.header-badge {
  background: var(--red);
  color: white;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  letter-spacing: 0.5px;
}

/* ===== HERO ===== */
.hero {
  background: linear-gradient(135deg, #0a2942 0%, #1a5276 50%, #1f618d 100%);
  color: white;
  padding: 60px 24px;
}

.hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  background: var(--gold);
  color: #1a1a00;
  font-size: 11px;
  font-weight: 800;
  padding: 5px 14px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: 44px;
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 8px;
  letter-spacing: -1px;
}

.hero h1 span { color: #85c1e9; }

.hero-subtitle {
  font-size: 17px;
  opacity: 0.9;
  margin-bottom: 24px;
  font-weight: 400;
  line-height: 1.6;
}

.hero-points {
  list-style: none;
  margin-bottom: 32px;
}

.hero-points li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  margin-bottom: 10px;
}

.hero-points li::before {
  content: '✓';
  background: #85c1e9;
  color: #0a2942;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 12px;
  flex-shrink: 0;
}

.price-block {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 28px;
  backdrop-filter: blur(4px);
}

.price-old {
  font-size: 16px;
  text-decoration: line-through;
  opacity: 0.6;
  margin-bottom: 4px;
}

.price-new {
  font-size: 48px;
  font-weight: 900;
  color: #85c1e9;
  line-height: 1;
}

.price-currency {
  font-size: 22px;
  font-weight: 700;
  vertical-align: middle;
}

.price-discount {
  display: inline-block;
  background: var(--red);
  color: white;
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 700;
  margin-top: 6px;
}

.price-note {
  font-size: 12px;
  opacity: 0.7;
  margin-top: 6px;
}

.cta-btn {
  display: block;
  width: 100%;
  background: linear-gradient(135deg, #f39c12, #e67e22);
  color: white;
  text-align: center;
  padding: 18px 32px;
  border-radius: 50px;
  font-size: 18px;
  font-weight: 800;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 1px;
  box-shadow: 0 6px 24px rgba(230,126,34,0.5);
  transition: transform 0.2s, box-shadow 0.2s;
  cursor: pointer;
  border: none;
}

.cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 32px rgba(230,126,34,0.6);
}

.cta-btn small {
  display: block;
  font-size: 11px;
  font-weight: 400;
  opacity: 0.9;
  margin-top: 3px;
  text-transform: none;
  letter-spacing: 0;
}

.hero-img-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.hero-img-wrap::before {
  content: '';
  position: absolute;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(133,193,233,0.2) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-img {
  max-width: 340px;
  width: 100%;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
  position: relative;
  z-index: 1;
}

.trust-row {
  display: flex;
  gap: 20px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  opacity: 0.85;
}

/* ===== SECTIONS COMMUNES ===== */
section { padding: 72px 24px; }

.container { max-width: 1000px; margin: 0 auto; }

.section-tag {
  display: inline-block;
  background: var(--blue-light);
  color: var(--blue-dark);
  font-size: 11px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 12px;
}

.section-title {
  font-size: 34px;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 12px;
  line-height: 1.2;
}

.section-title span { color: var(--blue); }

.section-sub {
  font-size: 17px;
  color: var(--text-light);
  margin-bottom: 48px;
  max-width: 640px;
}

/* ===== PROBLEM SECTION ===== */
.problem-section { background: var(--white); }

.symptoms-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.symptom-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 22px;
  text-align: center;
  transition: box-shadow 0.2s, transform 0.2s;
}

.symptom-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.symptom-icon {
  font-size: 40px;
  margin-bottom: 14px;
  display: block;
}

.symptom-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; color: var(--text); }
.symptom-card p { font-size: 13px; color: var(--text-light); line-height: 1.6; }

/* ===== HOW IT WORKS ===== */
.how-section { background: var(--bg); }

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.step {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
}

.step-num {
  width: 52px;
  height: 52px;
  background: var(--blue);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 900;
  margin: 0 auto 16px;
}

.step h3 { font-size: 17px; font-weight: 700; margin-bottom: 10px; color: var(--text); }
.step p { font-size: 14px; color: var(--text-light); line-height: 1.6; }

/* ===== BENEFITS ===== */
.benefits-section { background: var(--white); }

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

.benefit-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  transition: box-shadow 0.2s, transform 0.2s;
}

.benefit-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.benefit-icon {
  width: 52px;
  height: 52px;
  background: var(--blue-light);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}

.benefit-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 6px; color: var(--text); }
.benefit-card p { font-size: 13px; color: var(--text-light); line-height: 1.6; }

/* ===== INGREDIENTS ===== */
.ingredients-section { background: var(--blue-dark); color: white; }
.ingredients-section .section-tag { background: rgba(255,255,255,0.15); color: white; }
.ingredients-section .section-title { color: white; }
.ingredients-section .section-title span { color: #85c1e9; }
.ingredients-section .section-sub { color: rgba(255,255,255,0.75); }

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

.ingredient-card {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius);
  padding: 28px 22px;
  text-align: center;
  transition: background 0.2s;
}

.ingredient-card:hover { background: rgba(255,255,255,0.13); }

.ingredient-img {
  font-size: 40px;
  margin-bottom: 14px;
  display: block;
}

.ingredient-card h3 { font-size: 15px; font-weight: 700; margin-bottom: 10px; color: #85c1e9; }
.ingredient-card p { font-size: 13px; color: rgba(255,255,255,0.75); line-height: 1.6; }

/* ===== USAGE SECTION ===== */
.usage-section { background: var(--bg); }

.usage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 32px;
}

.usage-card {
  background: var(--white);
  border: 2px solid var(--blue-light);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
}

.usage-step {
  width: 52px;
  height: 52px;
  background: var(--blue);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 900;
  margin: 0 auto 16px;
}

.usage-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 10px; color: var(--blue-dark); }
.usage-card p { font-size: 14px; color: var(--text-light); line-height: 1.7; }

.usage-warning {
  background: #fef9e7;
  border: 1px solid #f1c40f;
  border-left: 4px solid #f39c12;
  border-radius: var(--radius);
  padding: 18px 22px;
  font-size: 14px;
  color: #7d6608;
  line-height: 1.7;
}

/* ===== TESTIMONIALS ===== */
.testimonials-section { background: var(--white); }

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
}

.stars { color: #f39c12; font-size: 18px; margin-bottom: 12px; }

.testimonial p {
  font-size: 14px;
  color: var(--text);
  font-style: italic;
  margin-bottom: 16px;
  line-height: 1.6;
}

.testimonial-author { display: flex; align-items: center; gap: 10px; }

.author-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
  color: white;
  flex-shrink: 0;
}

.author-name { font-size: 14px; font-weight: 700; }
.author-detail { font-size: 12px; color: var(--text-light); }

/* ===== FAQ ===== */
.faq-section { background: var(--bg); }

.faq-list { max-width: 800px; margin: 0 auto; }

.faq-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 20px 24px;
  text-align: left;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.faq-question .arrow {
  width: 26px;
  height: 26px;
  background: var(--blue-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform 0.3s;
  color: var(--blue-dark);
  font-size: 14px;
  font-weight: 900;
}

.faq-item.open .faq-question .arrow { transform: rotate(180deg); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.3s;
  padding: 0 24px;
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
}

.faq-item.open .faq-answer {
  max-height: 400px;
  padding: 0 24px 20px;
}

/* ===== CTA SECTION ===== */
.cta-section {
  background: linear-gradient(135deg, #0a2942, #1f618d);
  color: white;
  text-align: center;
}

.cta-section h2 { font-size: 38px; font-weight: 900; margin-bottom: 12px; }
.cta-section h2 span { color: #85c1e9; }

.cta-section p {
  font-size: 17px;
  opacity: 0.85;
  margin-bottom: 32px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.cta-price-display {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.cta-old { font-size: 20px; text-decoration: line-through; opacity: 0.5; }
.cta-new { font-size: 60px; font-weight: 900; color: #85c1e9; line-height: 1; }
.cta-badge { background: var(--red); padding: 6px 18px; border-radius: 8px; font-weight: 700; font-size: 16px; }

.cta-btn-large {
  display: inline-block;
  background: linear-gradient(135deg, #f39c12, #e67e22);
  color: white;
  padding: 22px 60px;
  border-radius: 50px;
  font-size: 20px;
  font-weight: 800;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  box-shadow: 0 8px 32px rgba(230,126,34,0.5);
  transition: transform 0.2s, box-shadow 0.2s;
}

.cta-btn-large:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 40px rgba(230,126,34,0.6);
}

.cta-guarantees {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-top: 28px;
  flex-wrap: wrap;
}

.cta-guarantee {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  opacity: 0.85;
}

/* ===== FOOTER ===== */
footer {
  background: #071525;
  color: rgba(255,255,255,0.5);
  text-align: center;
  padding: 32px 24px;
  font-size: 12px;
  line-height: 1.8;
}

footer a { color: rgba(255,255,255,0.4); text-decoration: underline; }

/* ===== STICKY CTA MÓVIL ===== */
.sticky-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(135deg, #f39c12, #e67e22);
  padding: 14px 20px;
  z-index: 999;
  box-shadow: 0 -4px 20px rgba(0,0,0,0.2);
}

.sticky-cta a {
  display: block;
  color: white;
  text-align: center;
  font-size: 16px;
  font-weight: 800;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .symptoms-grid { grid-template-columns: repeat(2, 1fr); }
  .ingredients-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .hero-inner { grid-template-columns: 1fr; gap: 32px; }
  .hero h1 { font-size: 30px; }
  .hero-img { max-width: 260px; }
  .hero-img-wrap { order: -1; }

  .steps { grid-template-columns: 1fr; }
  .benefits-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .usage-grid { grid-template-columns: 1fr; }

  .section-title { font-size: 26px; }
  .cta-section h2 { font-size: 26px; }
  .cta-new { font-size: 44px; }
  .cta-btn-large { padding: 18px 32px; font-size: 16px; }

  .sticky-cta { display: block; }
  footer { padding-bottom: 72px; }
}

@media (max-width: 540px) {
  .symptoms-grid { grid-template-columns: 1fr; }
  .ingredients-grid { grid-template-columns: 1fr; }
  .cta-guarantees { flex-direction: column; align-items: center; gap: 12px; }
}