/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #00C9A7;
  --primary-dark: #00B894;
  --primary-light: #55EFC4;
  --accent-color: #FF6B6B;
  --success-color: #00B894;
  --text-dark: #2d3436;
  --text-gray: #636e72;
  --text-light: #b2bec3;
  --bg-light: #f8f9fa;
  --bg-white: #ffffff;
  --bg-cream: #FFF9F0;
  --border-color: #dfe6e9;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.16);
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 40px;
  --spacing-xl: 56px;
  --spacing-2xl: 80px;
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --max-width: 1280px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: 17px;
  line-height: 1.7;
  color: var(--text-dark);
  background-color: var(--bg-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-dark);
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: 2.25rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 1.875rem;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.5rem;
}

p {
  line-height: 1.6;
  margin-bottom: var(--spacing-sm);
  color: var(--text-gray);
}

.text-center {
  text-align: center;
}

/* Container and Layout */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

.section {
  padding: var(--spacing-2xl) 0;
}

.section-alt {
  background-color: var(--bg-light);
}

/* Header and Navigation */
.header {
  background-color: var(--bg-white);
  border-bottom: 1px solid var(--border-color);
  padding: var(--spacing-sm) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

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

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

.lang-switcher {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  font-size: 0.875rem;
}

.lang-switcher a {
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.lang-switcher a:hover {
  background-color: var(--bg-light);
}

.lang-switcher .active {
  background-color: var(--primary-color);
  color: var(--bg-white);
}

/* Hero Section */
.hero {
  padding: var(--spacing-2xl) 0 var(--spacing-xl);
  background: linear-gradient(165deg, #E8FFF8 0%, #F0FDF4 50%, var(--bg-cream) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 201, 167, 0.08) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-text {
  order: 2;
}

.hero-image {
  order: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.hero-image::before {
  content: '';
  position: absolute;
  width: 120%;
  height: 120%;
  background: radial-gradient(circle, rgba(0, 201, 167, 0.1) 0%, transparent 65%);
  border-radius: 50%;
  z-index: -1;
}

.hero-image img {
  max-width: 450px;
  width: 100%;
  height: auto;
  filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.15));
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}

.hero h1 {
  margin-bottom: var(--spacing-md);
  color: var(--text-dark);
}

.hero-benefits {
  list-style: none;
  margin: var(--spacing-md) 0;
  display: grid;
  gap: var(--spacing-sm);
}

.hero-benefits li {
  padding: var(--spacing-sm) var(--spacing-sm) var(--spacing-sm) var(--spacing-xl);
  position: relative;
  color: var(--text-dark);
  font-size: 1.125rem;
  background: rgba(255, 255, 255, 0.7);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(0, 201, 167, 0.1);
  font-weight: 500;
}

.hero-benefits li::before {
  content: "✓";
  position: absolute;
  left: var(--spacing-sm);
  top: 50%;
  transform: translateY(-50%);
  color: var(--success-color);
  font-weight: 700;
  font-size: 1.5rem;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 201, 167, 0.15);
  border-radius: 50%;
}

.hero-price {
  margin: var(--spacing-md) 0;
}

.price-tag {
  display: inline-flex;
  align-items: baseline;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: white;
  border-radius: var(--radius-lg);
  font-size: 3rem;
  font-weight: 800;
  box-shadow: var(--shadow-lg);
  letter-spacing: -0.02em;
}

.price-label {
  display: block;
  color: var(--text-gray);
  font-size: 1.125rem;
  font-weight: 500;
  margin-top: var(--spacing-xs);
}

.hero-cta {
  margin-top: var(--spacing-md);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 18px 40px;
  font-size: 1.125rem;
  font-weight: 700;
  text-align: center;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
  line-height: 1.2;
  position: relative;
  overflow: hidden;
  letter-spacing: 0.02em;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: var(--bg-white);
  box-shadow: 0 8px 20px rgba(0, 201, 167, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(0, 201, 167, 0.4);
  color: var(--bg-white);
}

.btn-large {
  padding: 22px 50px;
  font-size: 1.3rem;
}

.btn-block {
  display: block;
  width: 100%;
}

/* Benefits Section */
.benefits-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.benefit-card {
  background: var(--bg-white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
}

.benefit-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.benefit-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(0, 201, 167, 0.2);
}

.benefit-card:hover::before {
  transform: scaleX(1);
}

.benefit-icon {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, rgba(0, 201, 167, 0.1) 0%, rgba(0, 184, 148, 0.15) 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.25rem;
  margin-bottom: var(--spacing-md);
  transition: all 0.3s ease;
}

.benefit-card:hover .benefit-icon {
  transform: scale(1.1) rotate(5deg);
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
}

.benefit-card h3 {
  margin-bottom: var(--spacing-sm);
  font-size: 1.4rem;
}

/* Ingredients Section */
.ingredients-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.ingredient-item {
  background: var(--bg-white);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--primary-color);
  box-shadow: var(--shadow-sm);
}

.ingredient-item h3 {
  color: var(--primary-color);
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xs);
}

/* How to Use Section */
.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.step {
  background: var(--bg-white);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  position: relative;
}

.step-number {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
  color: var(--bg-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
}

.step h3 {
  margin-bottom: var(--spacing-sm);
  padding-right: 60px;
}

/* Comparison Table */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: var(--spacing-lg);
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.comparison-table th,
.comparison-table td {
  padding: var(--spacing-sm);
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
  color: var(--bg-white);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

.comparison-table .check {
  color: var(--success-color);
  font-weight: 700;
  font-size: 1.25rem;
}

.comparison-table .cross {
  color: #ef4444;
  font-weight: 700;
  font-size: 1.25rem;
}

/* FAQ Section */
.faq {
  max-width: 800px;
  margin: var(--spacing-lg) auto 0;
}

.faq-item {
  background: var(--bg-white);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
  box-shadow: var(--shadow-sm);
}

.faq-item h3 {
  color: var(--primary-color);
  font-size: 1.125rem;
  margin-bottom: var(--spacing-xs);
}

/* CTA Box */
.cta-box {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
  color: var(--bg-white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-xl);
  margin-top: var(--spacing-lg);
}

.cta-box h2 {
  color: var(--bg-white);
  margin-bottom: var(--spacing-sm);
}

.cta-box p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.125rem;
  margin-bottom: var(--spacing-md);
}

.cta-box .btn {
  background: var(--bg-white);
  color: var(--primary-color);
}

.cta-box .btn:hover {
  background: var(--bg-light);
  transform: translateY(-2px);
  color: var(--primary-dark);
}

/* Footer */
.footer {
  background-color: var(--text-dark);
  color: var(--text-light);
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-section h3 {
  color: var(--bg-white);
  font-size: 1.125rem;
  margin-bottom: var(--spacing-sm);
}

.footer-section p,
.footer-section a {
  color: var(--text-light);
  font-size: 0.875rem;
  line-height: 1.6;
}

.footer-section a:hover {
  color: var(--bg-white);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.875rem;
}

/* Responsive Design */
@media (min-width: 640px) {
  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 2rem;
  }

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

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

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

@media (min-width: 768px) {
  h1 {
    font-size: 3.25rem;
  }

  h2 {
    font-size: 2.5rem;
  }

  .hero-content {
    grid-template-columns: 1.2fr 1fr;
    gap: var(--spacing-2xl);
  }

  .hero-text {
    order: 1;
  }

  .hero-image {
    order: 2;
  }

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

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

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

  .footer-content {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 var(--spacing-lg);
  }

  .section {
    padding: var(--spacing-2xl) 0;
  }

  .benefits-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Utility Classes */
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

.text-primary { color: var(--primary-color); }
.text-success { color: var(--success-color); }
.text-gray { color: var(--text-gray); }