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

:root {
  --primary-color: #0EA5E9;
  --primary-dark: #0284C7;
  --primary-light: #38BDF8;
  --accent-color: #06B6D4;
  --success-color: #10B981;
  --warning-color: #F59E0B;
  --error-color: #EF4444;
  --text-dark: #0F172A;
  --text-medium: #334155;
  --text-gray: #64748B;
  --text-light: #94A3B8;
  --bg-primary: #F8FAFC;
  --bg-secondary: #F1F5F9;
  --bg-white: #FFFFFF;
  --bg-cream: #FEFCE8;
  --border-color: #E2E8F0;
  --shadow-soft: 0 2px 12px rgba(15, 23, 42, 0.06);
  --shadow-medium: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-large: 0 16px 48px rgba(15, 23, 42, 0.12);
  --shadow-glow: 0 0 32px rgba(14, 165, 233, 0.15);
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --spacing-2xl: 64px;
  --spacing-3xl: 96px;
  --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: 1.65;
  color: var(--text-medium);
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-white) 100%);
  -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);
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.15;
  color: var(--text-dark);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.03em;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  font-weight: 800;
  background: linear-gradient(135deg, var(--text-dark) 0%, var(--primary-color) 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

h2 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 1.875rem);
  font-weight: 600;
}

p {
  line-height: 1.75;
  margin-bottom: var(--spacing-md);
  color: var(--text-gray);
  font-size: 1.0625rem;
}

.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 {
  padding: var(--spacing-3xl) 0 var(--spacing-2xl);
  background: radial-gradient(ellipse at top, rgba(14, 165, 233, 0.08) 0%, transparent 60%),
              linear-gradient(180deg, var(--bg-white) 0%, var(--bg-primary) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-2xl);
  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, var(--primary-light) 0%, transparent 70%);
  opacity: 0.12;
  border-radius: 50%;
  animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.12; }
  50% { transform: scale(1.1); opacity: 0.18; }
}

.hero-image img {
  max-width: 480px;
  width: 100%;
  height: auto;
  filter: drop-shadow(0 20px 40px rgba(14, 165, 233, 0.25));
  position: relative;
  z-index: 1;
}

.hero h1 {
  margin-bottom: var(--spacing-lg);
  line-height: 1.1;
}

.hero-intro {
  font-size: 1.25rem;
  line-height: 1.6;
  color: var(--text-gray);
  margin-bottom: var(--spacing-lg);
}

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

.hero-benefits li {
  padding: var(--spacing-md);
  padding-left: var(--spacing-2xl);
  position: relative;
  color: var(--text-medium);
  font-size: 1.125rem;
  font-weight: 500;
  background: var(--bg-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
  border-left: 4px solid var(--primary-color);
  transition: all 0.3s ease;
}

.hero-benefits li:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-medium);
}

.hero-benefits li::before {
  content: "✓";
  position: absolute;
  left: var(--spacing-sm);
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--success-color) 0%, #059669 100%);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.hero-price {
  margin: var(--spacing-xl) 0;
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glow);
  text-align: center;
}

.price-tag {
  display: block;
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--bg-white);
  line-height: 1;
  margin-bottom: var(--spacing-xs);
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

.price-label {
  color: rgba(255, 255, 255, 0.95);
  font-size: 1.125rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

.btn {
  display: inline-block;
  padding: 18px 40px;
  font-size: 1.125rem;
  font-weight: 600;
  text-align: center;
  border-radius: var(--radius-xl);
  border: none;
  cursor: pointer;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
  line-height: 1.4;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  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 24px rgba(14, 165, 233, 0.35);
  position: relative;
  z-index: 1;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-dark) 0%, #0369A1 100%);
  transform: translateY(-3px);
  box-shadow: 0 16px 32px rgba(14, 165, 233, 0.45);
  color: var(--bg-white);
}

.btn-large {
  padding: 22px 48px;
  font-size: 1.3rem;
  font-weight: 700;
}

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

.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-lg);
  box-shadow: var(--shadow-soft);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
}

.benefit-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 0;
  background: linear-gradient(180deg, var(--primary-color) 0%, var(--accent-color) 100%);
  transition: height 0.4s ease;
}

.benefit-card:hover::before {
  height: 100%;
}

.benefit-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-large);
  border-color: var(--primary-light);
}

.benefit-icon {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
  box-shadow: 0 8px 20px rgba(14, 165, 233, 0.25);
}

.benefit-card h3 {
  margin-bottom: var(--spacing-sm);
  color: var(--text-dark);
}

/* 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) {
  .hero-content {
    grid-template-columns: 1.2fr 1fr;
    gap: var(--spacing-3xl);
  }

  .hero-text {
    order: 1;
  }

  .hero-image {
    order: 2;
  }

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

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

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

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

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

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

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

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