:root {
  --color-bg: #0f1419;
  --color-bg-alt: #1a222c;
  --color-bg-card: #232d3a;
  --color-primary: #4a9b7a;
  --color-primary-hover: #6bc9a3;
  --color-primary-glow: rgba(107, 201, 163, 0.35);
  --color-btn-text: #ffffff;
  --color-btn-text-hover: #f0faf7;
  --color-accent: #7eb8a8;
  --color-text: #e8ecf0;
  --color-text-muted: #9ca8b6;
  --color-border: #2d3a47;
  --color-error: #c75c5c;
  --color-success: #4a9b7a;
  --font-heading: "DM Serif Display", Georgia, serif;
  --font-body: "Source Sans 3", "Segoe UI", sans-serif;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.35);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

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

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

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  margin-top: 0;
}

h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin-bottom: var(--space-lg); }
h3 { font-size: 1.25rem; margin-bottom: var(--space-md); }

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding-left: var(--space-lg);
  padding-right: var(--space-lg);
}

header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  min-height: 64px;
}

.brand {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--color-text);
}

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

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: var(--space-xl);
  flex-wrap: wrap;
}

nav a {
  color: var(--color-text-muted);
  font-weight: 500;
}

nav a:hover {
  color: var(--color-text);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1.5rem;
  cursor: pointer;
  padding: var(--space-sm);
}

main {
  padding-bottom: var(--space-3xl);
}

.hero {
  padding: var(--space-3xl) 0;
  background: linear-gradient(180deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

.hero-image-wrap {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.hero-image-wrap img {
  width: 100%;
  height: auto;
}

.hero-badges {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
  margin-top: var(--space-md);
  justify-content: center;
}

@media (min-width: 901px) {
  .hero-badges {
    justify-content: flex-start;
  }
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-card);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.badge-rating {
  color: #e8c547;
}

.hero-content h1 {
  margin-bottom: var(--space-md);
}

.hero-desc {
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
  max-width: 520px;
}

@media (max-width: 900px) {
  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }
}

.pricing {
  display: flex;
  align-items: baseline;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
  justify-content: center;
}

@media (min-width: 901px) {
  .pricing {
    justify-content: flex-start;
  }
}

.price-current {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary);
}

.price-old {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  text-decoration: line-through;
}

.hero-form {
  background: var(--color-bg-card);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  max-width: 420px;
}

@media (max-width: 900px) {
  .hero-form {
    margin: 0 auto;
  }
}

.hero-form .form-group {
  margin-bottom: var(--space-md);
}

.hero-form label {
  display: block;
  margin-bottom: var(--space-xs);
  font-weight: 500;
  font-size: 0.9rem;
}

.hero-form input,
.hero-form textarea {
  width: 100%;
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-alt);
  color: var(--color-text);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.hero-form input:focus,
.hero-form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(74, 155, 122, 0.2);
}

input.error,
textarea.error {
  border-color: var(--color-error);
}

.hero-form .error-msg {
  font-size: 0.85rem;
  color: var(--color-error);
  margin-top: var(--space-xs);
}

.hero-form .checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.hero-form .checkbox-group input {
  width: auto;
  margin-top: 4px;
}

.hero-form .checkbox-group label {
  margin-bottom: 0;
  font-size: 0.9rem;
}

.btn {
  display: inline-block;
  padding: var(--space-md) var(--space-xl);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-normal), color var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal), transform var(--transition-fast);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-btn-text);
  width: 100%;
  box-shadow: 0 2px 8px rgba(74, 155, 122, 0.25);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  color: var(--color-btn-text-hover);
  box-shadow: 0 6px 20px var(--color-primary-glow);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary-hover);
  color: var(--color-btn-text-hover);
  border-color: var(--color-primary-hover);
  box-shadow: 0 4px 14px var(--color-primary-glow);
}

.section {
  padding: var(--space-3xl) 0;
}

.section:nth-child(even) {
  background: var(--color-bg-alt);
}

#features .feature-card:nth-child(1) { border-top: 3px solid var(--color-primary); }
#features .feature-card:nth-child(2) { border-top: 3px solid var(--color-accent); }
#features .feature-card:nth-child(3) { border-top: 3px solid #6b8fa3; }

#benefits .benefit-item:nth-child(1) { border-left-color: var(--color-primary); }
#benefits .benefit-item:nth-child(2) { border-left-color: var(--color-accent); }
#benefits .benefit-item:nth-child(3) { border-left-color: #6b8fa3; }

#product .product-detail figure { border: 1px solid var(--color-border); }
#ingredients .ingredient-tag:nth-child(odd) { background: rgba(74, 155, 122, 0.12); }
#reviews .testimonial-card:nth-child(1) { box-shadow: 0 0 0 1px rgba(74, 155, 122, 0.3); }
#reviews .testimonial-card:nth-child(2) { box-shadow: 0 0 0 1px rgba(126, 184, 168, 0.3); }
#reviews .testimonial-card:nth-child(3) { box-shadow: 0 0 0 1px rgba(107, 143, 163, 0.3); }

.section-header {
  position: relative;
  z-index: 101;
  text-align: center;
  margin-bottom: var(--space-2xl);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-xl);
}

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

.feature-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.feature-card h3 {
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.feature-card p {
  color: var(--color-text-muted);
  margin: 0;
}

.benefits-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.benefit-item {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
  padding: var(--space-lg);
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-primary);
  transition: background var(--transition-normal);
}

.benefit-item:hover {
  background: rgba(74, 155, 122, 0.08);
}

.benefit-item strong {
  color: var(--color-primary);
}

.product-detail {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-2xl);
  align-items: start;
}

@media (max-width: 768px) {
  .product-detail {
    grid-template-columns: 1fr;
  }
}

.product-detail figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.product-detail img {
  width: 100%;
  height: auto;
}

.usage-steps {
  counter-reset: step;
}

.usage-step {
  display: flex;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
  align-items: flex-start;
}

.usage-step::before {
  counter-increment: step;
  content: counter(step);
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
}

.usage-step h4 {
  margin: 0 0 var(--space-sm) 0;
}

.usage-step p {
  color: var(--color-text-muted);
  margin: 0;
}

.ingredients-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-md);
}

.ingredient-tag {
  padding: var(--space-md);
  background: var(--color-bg-card);
  border-radius: var(--radius-sm);
  text-align: center;
  font-weight: 500;
  border: 1px solid var(--color-border);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-xl);
}

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

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

.testimonial-card blockquote {
  margin: 0 0 var(--space-md) 0;
  font-style: italic;
  color: var(--color-text-muted);
}

.testimonial-card cite {
  font-style: normal;
  font-weight: 600;
  color: var(--color-accent);
}

.faq-list {
  max-width: 720px;
  margin: 0 auto;
}

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

.faq-item summary {
  padding: var(--space-lg) 0;
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  transition: color var(--transition-fast);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: 1.25rem;
  color: var(--color-primary);
  flex-shrink: 0;
}

.faq-item[open] summary::after {
  content: "−";
}

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

.faq-item > div {
  padding: 0 0 var(--space-lg) 0;
  margin-top: 0;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.cta-section {
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
  border-radius: var(--radius-lg);
  margin: 0 var(--space-lg) var(--space-3xl);
}

.cta-section .btn {
  margin-top: var(--space-lg);
}

.disclaimer {
  background: var(--color-bg-card);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  color: var(--color-text-muted);
  border-left: 4px solid var(--color-accent);
  margin: 0 var(--space-lg) var(--space-2xl);
}

footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer-grid h4 {
  font-size: 1rem;
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.footer-grid ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-grid li {
  margin-bottom: var(--space-sm);
}

.footer-grid a {
  color: var(--color-text-muted);
}

.footer-grid a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-bg-card);
  border-top: 1px solid var(--color-border);
  padding: var(--space-xl);
  box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.3);
  z-index: 1000;
  display: none;
}

.cookie-banner.visible {
  display: block;
}

.cookie-banner p {
  margin: 0 0 var(--space-md) 0;
  color: var(--color-text-muted);
  max-width: 720px;
}

.cookie-banner .cookie-actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.cookie-settings {
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
  display: none;
}

.cookie-settings.visible {
  display: block;
}

.cookie-category {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
}

.cookie-category:last-child {
  border-bottom: none;
}

.cookie-category span:first-child {
  font-weight: 500;
}

.switch {
  position: relative;
  width: 48px;
  height: 26px;
  background: var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.switch.checked {
  background: var(--color-primary);
}

.switch::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  background: #fff;
  border-radius: 50%;
  top: 2px;
  left: 2px;
  transition: transform var(--transition-fast);
}

.switch.checked::after {
  transform: translateX(22px);
}

.legal-page main {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-lg);
}

.legal-page h1 {
  margin-bottom: var(--space-xl);
}

.legal-page h2 {
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
}

.legal-page p,
.legal-page li {
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.legal-page ul {
  padding-left: var(--space-xl);
}

.legal-page .back-home {
  display: inline-block;
  margin-bottom: var(--space-xl);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-card);
  border-radius: var(--radius-sm);
  color: var(--color-primary);
  font-weight: 500;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.legal-page .back-home:hover {
  background: var(--color-primary);
  color: #fff;
}

.thank-you-page {
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
}

.thank-you-page h1 {
  margin-bottom: var(--space-md);
}

.thank-you-page p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.thank-you-page .mailto-btn {
  display: inline-block;
  margin: var(--space-md);
}

.contact-block {
  background: var(--color-bg-card);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  margin: var(--space-xl) 0;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.contact-block a {
  font-weight: 500;
}

@media (max-width: 1000px) {
  .menu-toggle {
    display: block;
  }

  nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-lg);
    display: none;
  }

  nav.visible {
    display: block;
  }

  nav ul {
    flex-direction: column;
    gap: var(--space-md);
  }

  .header-inner {
    position: relative;
  }
}