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

:root {
  --color-primary: #0e7a4d;
  --color-primary-dark: #0a5c3a;
  --color-primary-light: #e8f5ee;
  --color-secondary: #1a6b3c;
  --color-accent: #f59e0b;
  --color-accent-dark: #d97706;
  --color-success: #16a34a;
  --color-warning: #eab308;
  --color-error: #dc2626;
  --color-text: #1f2937;
  --color-text-secondary: #4b5563;
  --color-text-light: #6b7280;
  --color-bg: #ffffff;
  --color-bg-alt: #f8faf9;
  --color-bg-section: #f0faf4;
  --color-border: #e5e7eb;
  --color-border-light: #f3f4f6;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.1);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.12);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;
  --spacing-4xl: 96px;
  --max-width: 1200px;
  --transition: 0.25s ease;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-dark);
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
  color: var(--color-text);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.15rem; }

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

/* ===== HEADER ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.5px;
}

.logo span {
  color: var(--color-text);
}

.nav-links {
  display: flex;
  gap: var(--spacing-xl);
  list-style: none;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition);
}

.nav-links a:hover {
  color: var(--color-primary);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: 8px 20px;
  background: var(--color-primary);
  color: #fff !important;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  transition: background var(--transition), transform var(--transition);
}

.nav-cta:hover {
  background: var(--color-primary-dark);
  color: #fff !important;
  transform: translateY(-1px);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  transition: var(--transition);
}

/* ===== HERO ===== */
.hero {
  padding: var(--spacing-4xl) 0 var(--spacing-3xl);
  background: linear-gradient(135deg, #f0faf4 0%, #e3f2e8 50%, #dceee3 100%);
  overflow: hidden;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.hero-content {
  max-width: 560px;
}

.hero-badge {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(14,122,77,0.1);
  color: var(--color-primary);
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 50px;
  margin-bottom: var(--spacing-lg);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.hero h1 {
  font-size: 2.75rem;
  line-height: 1.15;
  margin-bottom: var(--spacing-lg);
  letter-spacing: -0.5px;
}

.hero h1 em {
  font-style: normal;
  color: var(--color-primary);
}

.hero-bullets {
  list-style: none;
  margin-bottom: var(--spacing-xl);
}

.hero-bullets li {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-sm) 0;
  font-size: 1.05rem;
  color: var(--color-text-secondary);
}

.hero-bullets li::before {
  content: '';
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  background: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z'/%3E%3C/svg%3E");
  background-size: 14px;
  background-repeat: no-repeat;
  background-position: center;
}

.hero-cta-group {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 16px 36px;
  background: var(--color-primary);
  color: #fff;
  font-size: 1.05rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 14px rgba(14,122,77,0.3);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(14,122,77,0.4);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 16px 36px;
  background: transparent;
  color: var(--color-primary);
  font-size: 1.05rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 2px solid var(--color-primary);
  cursor: pointer;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

.btn-secondary:hover {
  background: var(--color-primary);
  color: #fff;
  transform: translateY(-2px);
}

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

.hero-image img {
  max-width: 480px;
  width: 100%;
  filter: drop-shadow(0 20px 40px rgba(0,0,0,0.15));
  animation: floatUp 3s ease-in-out infinite alternate;
}

@keyframes floatUp {
  0% { transform: translateY(0); }
  100% { transform: translateY(-12px); }
}

.hero-image::before {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(14,122,77,0.08) 0%, transparent 70%);
  border-radius: 50%;
  z-index: 0;
}

.hero-image img {
  position: relative;
  z-index: 1;
}

/* ===== TRUST BAR ===== */
.trust-bar {
  padding: var(--spacing-2xl) 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border-light);
}

.trust-items {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
}

.trust-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: var(--color-primary-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.trust-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--color-primary);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.trust-item h4 {
  font-size: 0.95rem;
  margin-bottom: 2px;
}

.trust-item p {
  font-size: 0.8rem;
  color: var(--color-text-light);
}

/* ===== SECTIONS COMMON ===== */
section {
  padding: var(--spacing-4xl) 0;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.section-title {
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  max-width: 640px;
  line-height: 1.6;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-header .section-subtitle {
  margin: 0 auto;
}

/* ===== BENEFITS ===== */
.benefits {
  background: var(--color-bg);
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
}

.benefit-card {
  padding: var(--spacing-xl);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.benefit-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.benefit-icon {
  width: 56px;
  height: 56px;
  background: var(--color-primary-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
  font-size: 1.5rem;
}

.benefit-card h3 {
  margin-bottom: var(--spacing-sm);
  font-size: 1.15rem;
}

.benefit-card p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ===== COMPOSITION ===== */
.composition {
  background: var(--color-bg-alt);
}

.composition-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
  max-width: 900px;
  margin: 0 auto;
}

.comp-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: var(--color-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
  transition: box-shadow var(--transition);
}

.comp-item:hover {
  box-shadow: var(--shadow-sm);
}

.comp-dot {
  flex-shrink: 0;
  width: 10px;
  height: 10px;
  background: var(--color-primary);
  border-radius: 50%;
  margin-top: 6px;
}

.comp-item h4 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.comp-item p {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

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

.usage-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
  max-width: 900px;
  margin: 0 auto;
}

.usage-step {
  text-align: center;
  padding: var(--spacing-xl);
}

.step-number {
  width: 48px;
  height: 48px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.usage-step h3 {
  margin-bottom: var(--spacing-sm);
}

.usage-step p {
  color: var(--color-text-secondary);
  font-size: 0.93rem;
  line-height: 1.6;
}

.usage-note {
  text-align: center;
  margin-top: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: var(--color-primary-light);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== PRICING ===== */
.pricing {
  background: var(--color-bg-section);
}

.pricing-box {
  max-width: 700px;
  margin: 0 auto;
  background: var(--color-bg);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-lg);
  text-align: center;
}

.pricing-box h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}

.pricing-text {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: var(--spacing-lg);
  text-align: left;
}

.pricing-features {
  list-style: none;
  text-align: left;
  margin-bottom: var(--spacing-xl);
}

.pricing-features li {
  padding: var(--spacing-sm) 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 0.95rem;
  color: var(--color-text-secondary);
}

.pricing-features li::before {
  content: '';
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  background: var(--color-primary);
  border-radius: 50%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z'/%3E%3C/svg%3E");
  background-size: 12px;
  background-repeat: no-repeat;
  background-position: center;
}

/* ===== BENU ===== */
.benu {
  background: var(--color-bg);
}

.benu-content {
  max-width: 800px;
  margin: 0 auto;
}

.benu-content p {
  color: var(--color-text-secondary);
  font-size: 0.97rem;
  line-height: 1.7;
  margin-bottom: var(--spacing-md);
}

.info-box {
  padding: var(--spacing-lg);
  background: #fef9e7;
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: var(--spacing-lg) 0;
}

.info-box p {
  color: var(--color-text);
  font-size: 0.93rem;
  margin-bottom: 0;
}

/* ===== REVIEWS ===== */
.reviews {
  background: var(--color-bg-alt);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
}

.review-card {
  background: var(--color-bg);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  transition: box-shadow var(--transition);
}

.review-card:hover {
  box-shadow: var(--shadow-md);
}

.review-stars {
  color: var(--color-accent);
  font-size: 1rem;
  margin-bottom: var(--spacing-md);
  letter-spacing: 2px;
}

.review-card p {
  font-size: 0.93rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
  font-style: italic;
}

.review-author {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
}

/* ===== DISCUSSION ===== */
.discussion {
  background: var(--color-bg);
}

.discussion-items {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.disc-item {
  padding: var(--spacing-lg);
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-primary);
}

.disc-item h4 {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.disc-item p {
  color: var(--color-text-secondary);
  font-size: 0.93rem;
  line-height: 1.6;
}

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

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

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg) 0;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text);
  font-family: var(--font-family);
  transition: color var(--transition);
}

.faq-question:hover {
  color: var(--color-primary);
}

.faq-chevron {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  transition: transform var(--transition);
}

.faq-item.active .faq-chevron {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding-bottom: var(--spacing-lg);
}

.faq-answer p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ===== FINAL CTA ===== */
.final-cta {
  background: linear-gradient(135deg, #0e7a4d 0%, #0a5c3a 100%);
  padding: var(--spacing-4xl) 0;
  text-align: center;
}

.final-cta h2 {
  color: #fff;
  font-size: 2.25rem;
  margin-bottom: var(--spacing-md);
}

.final-cta p {
  color: rgba(255,255,255,0.85);
  font-size: 1.1rem;
  max-width: 540px;
  margin: 0 auto var(--spacing-xl);
  line-height: 1.6;
}

.final-cta .btn-primary {
  background: #fff;
  color: var(--color-primary);
  font-size: 1.15rem;
  padding: 18px 48px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.final-cta .btn-primary:hover {
  background: #f0faf4;
  color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.25);
}

/* ===== FOOTER ===== */
.site-footer {
  background: #111827;
  color: #9ca3af;
  padding: var(--spacing-2xl) 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-disclaimer {
  font-size: 0.8rem;
  line-height: 1.6;
  max-width: 700px;
}

.footer-copy {
  font-size: 0.8rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  h1 { font-size: 2rem; }
  .hero h1 { font-size: 2.25rem; }
  .benefits-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root {
    --spacing-4xl: 64px;
    --spacing-3xl: 48px;
  }

  .nav-links { display: none; }
  .nav-cta.desktop { display: none; }
  .mobile-toggle { display: block; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    gap: var(--spacing-md);
  }

  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--spacing-xl);
  }

  .hero-content {
    max-width: 100%;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero-bullets li {
    justify-content: center;
  }

  .hero-cta-group {
    justify-content: center;
  }

  .hero-image {
    order: -1;
  }

  .hero-image img {
    max-width: 320px;
  }

  .trust-items {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .usage-steps {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

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

  .section-title {
    font-size: 1.65rem;
  }

  .final-cta h2 {
    font-size: 1.75rem;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  body { font-size: 15px; }

  .hero h1 { font-size: 1.65rem; }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

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

  .trust-items {
    grid-template-columns: 1fr;
  }

  .pricing-box {
    padding: var(--spacing-lg);
  }
}