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

:root {
  --primary: #d4789c;
  --primary-dark: #b85d80;
  --primary-light: #f9e8ef;
  --text: #2d2d2d;
  --text-muted: #666;
  --bg: #fefcfd;
  --bg-alt: #faf5f7;
  --white: #fff;
  --border: #e8dce2;
  --shadow: 0 2px 12px rgba(180, 90, 120, 0.10);
  --radius: 10px;
  --max-width: 1100px;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }

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

a { color: var(--primary-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); line-height: 1.25; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin-bottom: 1rem; }
h3 { font-size: 1.1rem; margin-bottom: 0.5rem; }

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 0.8rem 1.8rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  transition: background 0.2s, transform 0.1s;
  text-decoration: none;
}
.btn:hover { transform: translateY(-1px); text-decoration: none; }
.btn-primary { background: var(--primary); color: var(--white); }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: var(--white); color: var(--primary-dark); border: 2px solid var(--primary); }
.btn-secondary:hover { background: var(--primary-light); }
.btn-large { padding: 1rem 2.4rem; font-size: 1.1rem; }

/* ===== SECTION A: Hero ===== */
.hero {
  padding: 4rem 0 3rem;
  background: linear-gradient(160deg, var(--primary-light) 0%, var(--bg) 60%);
}
.hero-content {
  display: flex;
  align-items: center;
  gap: 3rem;
}
.hero-image {
  flex: 0 0 280px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  background: var(--white);
  object-fit: cover;
  aspect-ratio: 1;
}
.hero-text { flex: 1; }
.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin: 1rem 0 1.5rem;
}
.hero-ctas { display: flex; gap: 1rem; flex-wrap: wrap; }

/* ===== SECTION B: Why 3-Layer ===== */
.why-3layer {
  padding: 4rem 0;
  background: var(--bg);
}
.section-intro {
  max-width: 720px;
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 2.5rem;
}
.three-col {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}
.three-col .col img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  background: var(--primary-light);
}
.three-col .col h3 { font-size: 1.15rem; }
.three-col .col p { color: var(--text-muted); font-size: 0.95rem; }

/* ===== SECTION C: 4-in-1 ===== */
.training-uses {
  padding: 4rem 0;
  background: var(--bg-alt);
}
.four-col {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}
.card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}
.card img {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  background: var(--primary-light);
}
.card h3 { font-size: 1.05rem; }
.card p { color: var(--text-muted); font-size: 0.9rem; }

/* ===== SECTION D: Price Comparison ===== */
.price-comparison {
  padding: 4rem 0;
  background: var(--bg);
}
.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin: 1.5rem 0;
}
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  font-size: 0.95rem;
}
.comparison-table th {
  background: var(--primary);
  color: var(--white);
  padding: 0.9rem 1.2rem;
  text-align: left;
  font-weight: 600;
}
.comparison-table td {
  padding: 0.9rem 1.2rem;
  border-bottom: 1px solid var(--border);
}
.comparison-table tr:last-child td { border-bottom: none; }
.highlight-row { background: var(--primary-light); }
.highlight-row td { font-weight: 500; }
.bulk-note {
  text-align: center;
  color: var(--text-muted);
  margin-top: 1.5rem;
  font-size: 0.95rem;
}

/* ===== SECTION E: Reviews ===== */
.reviews {
  padding: 4rem 0;
  background: var(--bg-alt);
}
.source-note {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 2rem;
  font-style: italic;
}
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
}
.review {
  background: var(--white);
  padding: 1.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border-left: 3px solid var(--primary);
  font-style: italic;
  color: var(--text);
}
.review p { font-size: 0.95rem; }

/* ===== SECTION F: FAQ ===== */
.faq {
  padding: 4rem 0;
  background: var(--bg);
}
.faq-item {
  background: var(--white);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  box-shadow: 0 1px 4px rgba(0,0,0,0.05);
  overflow: hidden;
}
.faq-item summary {
  padding: 1rem 1.5rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-size: 1.3rem;
  color: var(--primary);
  font-weight: 400;
}
.faq-item[open] summary::after { content: '−'; }
.faq-item p {
  padding: 0 1.5rem 1.25rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ===== SECTION G: Final CTA ===== */
.cta-final {
  padding: 4rem 0;
  background: linear-gradient(160deg, var(--primary-light) 0%, var(--bg-alt) 100%);
  text-align: center;
}
.cta-final h2 { margin-bottom: 1.5rem; }
.cta-buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ===== SECTION H: Footer ===== */
.site-footer {
  padding: 2rem 0;
  background: var(--text);
  color: var(--white);
  text-align: center;
  font-size: 0.85rem;
}
.footer-brand { font-weight: 700; margin-bottom: 0.5rem; }
.footer-links { margin-bottom: 0.5rem; }
.footer-links a { color: var(--primary-light); }
.footer-links a:hover { color: var(--white); text-decoration: underline; }
.sep { color: rgba(255,255,255,0.3); margin: 0 0.4rem; }
.footer-copy { color: rgba(255,255,255,0.5); }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero-content {
    flex-direction: column;
    gap: 2rem;
  }
  .hero-image {
    flex: 0 0 auto;
    max-width: 260px;
    margin: 0 auto;
  }
  .hero-ctas { justify-content: center; }
  .hero-text { text-align: center; }

  .three-col { grid-template-columns: 1fr; }
  .four-col { grid-template-columns: 1fr 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .comparison-table th,
  .comparison-table td { padding: 0.7rem 0.8rem; font-size: 0.85rem; }
}

@media (max-width: 480px) {
  .four-col { grid-template-columns: 1fr; }
  .hero { padding: 2.5rem 0 2rem; }
}