:root {
  --bg: #f9faf9;
  --surface: #ffffff;
  --surface-soft: #dff3e4;
  --surface-soft-2: #cfe8d5;
  --text: #233129;
  --muted: #4f6356;
  --accent: #6aa87c;
  --accent-dark: #568f67;
  --border: #cfe8d5;
  --shadow: 0 8px 22px rgba(38, 79, 55, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: Inter, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  padding-bottom: 76px;
}

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

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1120px, calc(100% - 32px));
  margin-inline: auto;
}

.section {
  padding: 54px 0;
}

.section-head {
  text-align: center;
  margin-bottom: 24px;
}

.section-head h2 {
  margin: 0 0 8px;
  font-family: "Playfair Display", serif;
  font-size: clamp(1.75rem, 5vw, 2.4rem);
  line-height: 1.2;
}

.section-head p {
  margin: 0;
  color: var(--muted);
}

.hero {
  background: linear-gradient(180deg, var(--surface) 0%, #f3f8f4 100%);
}

.hero-wrap {
  display: grid;
  gap: 22px;
  align-items: center;
}

.hero h1 {
  margin: 0 0 12px;
  font-family: "Playfair Display", serif;
  font-size: clamp(2rem, 6.5vw, 3.2rem);
  line-height: 1.15;
}

.hero-subtext {
  margin: 0 0 18px;
  font-size: clamp(1rem, 3.8vw, 1.16rem);
  color: var(--muted);
}

.hero-cta {
  display: grid;
  gap: 10px;
  margin-bottom: 16px;
}

.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  min-height: 48px;
  border-radius: 12px;
  font-weight: 700;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow);
}

.btn-primary:hover {
  background: var(--accent-dark);
}

.btn-secondary {
  background: #fff;
  border-color: var(--border);
}

.hero-badges {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-weight: 600;
}

.hero-image img {
  border-radius: 16px;
  box-shadow: var(--shadow);
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.product-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(48, 86, 63, 0.06);
}

.product-image-wrap {
  position: relative;
  overflow: hidden;
}

.product-image-wrap::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(106, 168, 124, 0);
  transition: background 0.25s ease;
}

.product-card img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.product-card:hover img {
  transform: scale(1.05);
}

.product-card:hover .product-image-wrap::after {
  background: rgba(106, 168, 124, 0.14);
}

.product-info {
  padding: 12px;
}

.product-info h3 {
  margin: 0 0 10px;
  font-size: 1rem;
}

.btn-card {
  background: #f4faf6;
  border-color: var(--border);
}

.why-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.why-list li {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 13px;
  font-weight: 500;
}

.why-icon {
  color: var(--accent);
  margin-right: 8px;
}

.feedback-grid {
  display: grid;
  gap: 14px;
}

.feedback-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  box-shadow: 0 4px 16px rgba(48, 86, 63, 0.06);
}

.feedback-card img {
  border-radius: 10px;
}

.feedback-card p {
  margin: 10px 0 4px;
  font-weight: 600;
}

.feedback-card span {
  color: var(--muted);
  font-size: 0.94rem;
}

.offer-box {
  background: linear-gradient(145deg, #f3fbf5 0%, #ecf7ef 100%);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  text-align: center;
}

.offer-box h2 {
  margin: 0 0 8px;
  font-family: "Playfair Display", serif;
}

.offer-box p {
  margin: 0 0 16px;
  color: var(--muted);
}

.countdown {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.countdown div {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 6px;
}

.countdown span {
  display: block;
  font-size: 1.3rem;
  font-weight: 800;
  line-height: 1;
}

.countdown small {
  color: var(--muted);
}

.contact {
  padding-bottom: 84px;
}

.contact h2 {
  margin: 0 0 14px;
  text-align: center;
  font-family: "Playfair Display", serif;
}

.contact-cta {
  display: grid;
  gap: 10px;
}

.floating-zalo {
  position: fixed;
  right: 16px;
  bottom: 92px;
  width: 56px;
  height: 56px;
  border-radius: 999px;
  background: #1f9d5d;
  color: #fff;
  font-weight: 700;
  display: grid;
  place-items: center;
  box-shadow: 0 10px 20px rgba(31, 157, 93, 0.26);
  z-index: 45;
}

.mobile-sticky-cta {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 40;
  background: #fff;
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding: 10px 12px;
}

.mobile-sticky-cta a {
  min-height: 44px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.mobile-sticky-cta a:first-child {
  background: var(--accent);
  color: #fff;
}

.mobile-sticky-cta a:last-child {
  background: #eef8f1;
  color: #2e6b41;
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (min-width: 768px) {
  body {
    padding-bottom: 0;
  }

  .hero-wrap {
    grid-template-columns: 1fr 1fr;
    gap: 34px;
  }

  .hero-cta,
  .contact-cta {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .product-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .feedback-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .floating-zalo {
    bottom: 20px;
  }

  .mobile-sticky-cta {
    display: none;
  }
}

@media (min-width: 1120px) {
  .product-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}