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

:root {
  --primary-color: #1a1a2e;
  --secondary-color: #16213e;
  --accent-color: #0f3460;
  --highlight: #e94560;
  --text-primary: #ffffff;
  --text-secondary: #b8b8b8;
  --text-muted: #888888;
  --bg-dark: #0f0f1e;
  --bg-card: #1a1a2e;
  --border-color: rgba(255, 255, 255, 0.1);
  --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(15, 15, 30, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  padding: 1rem 0;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-text {
  font-family: 'Playfair Display', serif;
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-3);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav-menu a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
  font-size: 0.95rem;
}

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

.nav-cta {
  background: var(--gradient-3);
  padding: 0.6rem 1.5rem;
  border-radius: 25px;
  color: var(--text-primary) !important;
  font-weight: 600;
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-menu-toggle span {
  width: 25px;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.3s;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  background: radial-gradient(ellipse at top, rgba(79, 172, 254, 0.1) 0%, transparent 50%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(79, 172, 254, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 0.8; }
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-title {
  font-family: 'Playfair Display', serif;
  font-size: 4rem;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.title-line {
  display: block;
  background: linear-gradient(135deg, #ffffff 0%, #b8b8b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.8;
}

.hero-note {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 1rem;
  font-style: italic;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  margin-bottom: 3rem;
}

.btn {
  padding: 1rem 2rem;
  border-radius: 30px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s;
  display: inline-block;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn-primary {
  background: var(--gradient-3);
  color: var(--text-primary);
  box-shadow: 0 4px 15px rgba(79, 172, 254, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(79, 172, 254, 0.6);
}

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

.btn-secondary:hover {
  border-color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.btn-large {
  padding: 1.2rem 2.5rem;
  font-size: 1.1rem;
  width: 100%;
}

.hero-stats {
  display: flex;
  gap: 3rem;
}

.stat {
  text-align: left;
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  background: var(--gradient-3);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 0.3rem;
}

/* Product Visual */
.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
  animation: fadeIn 1s ease-out 0.3s both;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.product-visual {
  position: relative;
  width: 400px;
  height: 400px;
}

.sphere-container {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.sphere {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(79, 172, 254, 0.3) 0%, rgba(0, 242, 254, 0.3) 100%);
  box-shadow: 
    inset -30px -30px 60px rgba(0, 0, 0, 0.3),
    inset 30px 30px 60px rgba(255, 255, 255, 0.1),
    0 20px 60px rgba(79, 172, 254, 0.4);
  position: relative;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(5deg); }
}

.sphere::before {
  content: '';
  position: absolute;
  top: 20%;
  left: 20%;
  width: 60%;
  height: 60%;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.3), transparent);
}

.sphere-glow {
  position: absolute;
  width: 350px;
  height: 350px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79, 172, 254, 0.2) 0%, transparent 70%);
  animation: glow 3s ease-in-out infinite;
}

@keyframes glow {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 0.8; transform: scale(1.1); }
}

/* Sauna Benefits Section */
.sauna-benefits {
  padding: 6rem 0;
  background: var(--bg-card);
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
  margin-bottom: 3rem;
}

.benefit-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 2rem;
  transition: all 0.3s;
  backdrop-filter: blur(10px);
}

.benefit-card:hover {
  transform: translateY(-5px);
  border-color: rgba(79, 172, 254, 0.5);
  box-shadow: 0 10px 30px rgba(79, 172, 254, 0.2);
}

.benefit-card .benefit-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.benefit-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.benefit-card p {
  color: var(--text-secondary);
  line-height: 1.8;
}

.sauna-warning {
  background: rgba(233, 69, 96, 0.1);
  border: 2px solid rgba(233, 69, 96, 0.3);
  border-radius: 20px;
  padding: 2.5rem;
  margin-top: 3rem;
  text-align: center;
}

.sauna-warning h3 {
  font-size: 1.8rem;
  color: var(--highlight);
  margin-bottom: 1rem;
}

.sauna-warning p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.sauna-warning strong {
  color: var(--text-primary);
}

/* Science Section */
.science {
  padding: 6rem 0;
  background: var(--bg-dark);
}

.science-content {
  max-width: 1000px;
  margin: 0 auto;
}

.science-main {
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.research-block {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 2.5rem;
  backdrop-filter: blur(10px);
}

.research-block h3 {
  font-size: 1.8rem;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  background: var(--gradient-3);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.research-block p {
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.research-block strong {
  color: var(--text-primary);
}

.research-findings {
  list-style: none;
  padding-left: 0;
  margin-top: 1.5rem;
}

.research-findings li {
  color: var(--text-secondary);
  line-height: 2;
  padding-left: 2rem;
  position: relative;
  margin-bottom: 1rem;
  font-size: 1.05rem;
}

.research-findings li::before {
  content: '📊';
  position: absolute;
  left: 0;
  top: 0;
}

.mechanism-list {
  list-style: decimal;
  padding-left: 2rem;
  margin-top: 1.5rem;
  color: var(--text-secondary);
}

.mechanism-list li {
  margin-bottom: 1rem;
  line-height: 1.8;
  font-size: 1.05rem;
}

.research-sources {
  background: rgba(79, 172, 254, 0.1);
  border: 2px solid rgba(79, 172, 254, 0.3);
  border-radius: 20px;
  padding: 2.5rem;
  margin-top: 2rem;
}

.research-sources h3 {
  font-size: 1.8rem;
  color: var(--text-primary);
  margin-bottom: 2rem;
  text-align: center;
}

.sources-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.source-item {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: 15px;
  padding: 1.5rem;
}

.source-item strong {
  display: block;
  color: var(--text-primary);
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.source-item p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 0;
}

.source-item em {
  color: var(--text-secondary);
}

/* Features Section */
.features {
  padding: 6rem 0;
  background: var(--bg-card);
}

.section-title {
  font-family: 'Playfair Display', serif;
  font-size: 3rem;
  text-align: center;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #ffffff 0%, #b8b8b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.2rem;
  margin-bottom: 3rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.feature-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 2rem;
  transition: all 0.3s;
  backdrop-filter: blur(10px);
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: rgba(79, 172, 254, 0.5);
  box-shadow: 0 10px 30px rgba(79, 172, 254, 0.2);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.feature-card p {
  color: var(--text-secondary);
  line-height: 1.8;
}

/* Benefits Section */
.benefits {
  padding: 6rem 0;
  background: var(--bg-dark);
}

.benefits-content {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 4rem;
  align-items: center;
}

.benefits-intro {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.8;
}

.benefits-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.benefit-item {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}

.benefit-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.benefit-content h3 {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.benefit-content p {
  color: var(--text-secondary);
  line-height: 1.8;
}

.benefits-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.visual-card {
  background: rgba(79, 172, 254, 0.1);
  border: 2px solid rgba(79, 172, 254, 0.3);
  border-radius: 20px;
  padding: 3rem;
  text-align: center;
  backdrop-filter: blur(10px);
}

.visual-title {
  font-family: 'Playfair Display', serif;
  font-size: 2rem;
  margin-bottom: 1rem;
  background: var(--gradient-3);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.visual-description {
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: 1.1rem;
}

/* How It Works */
.how-it-works {
  padding: 6rem 0;
  background: var(--bg-card);
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.step {
  text-align: center;
  padding: 2rem;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 20px;
  border: 1px solid var(--border-color);
  transition: all 0.3s;
}

.step:hover {
  transform: translateY(-5px);
  border-color: rgba(79, 172, 254, 0.5);
}

.step-number {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--gradient-3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 700;
  margin: 0 auto 1.5rem;
}

.step-content h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.step-content p {
  color: var(--text-secondary);
  line-height: 1.8;
}

/* Testimonials */
.testimonials {
  padding: 6rem 0;
  background: var(--bg-dark);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.testimonial-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 2rem;
  backdrop-filter: blur(10px);
}

.testimonial-rating {
  color: #ffd700;
  font-size: 1.2rem;
  margin-bottom: 1rem;
}

.testimonial-text {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1.5rem;
  font-style: italic;
}

.testimonial-author {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 600;
}

/* Order Section */
.order {
  padding: 6rem 0;
  background: var(--bg-card);
}

.order-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.order-description {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.8;
}

.order-features {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.order-feature {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.order-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 2.5rem;
  backdrop-filter: blur(10px);
  position: sticky;
  top: 100px;
}

.product-price {
  text-align: center;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
}

.price-label {
  display: block;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.price-amount {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.2rem;
  margin-bottom: 0.5rem;
}

.currency {
  font-size: 1.5rem;
  color: var(--text-secondary);
}

.amount {
  font-size: 3.5rem;
  font-weight: 700;
  background: var(--gradient-3);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cents {
  font-size: 1.5rem;
  color: var(--text-secondary);
}

.price-note {
  display: block;
  color: var(--text-muted);
  font-size: 0.9rem;
  text-decoration: line-through;
}

.order-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
}

.form-group input,
.form-group select {
  padding: 1rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  transition: all 0.3s;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: rgba(79, 172, 254, 0.5);
  background: rgba(255, 255, 255, 0.08);
}

.form-note {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 0.5rem;
}

/* FAQ Section */
.faq {
  padding: 6rem 0;
  background: var(--bg-dark);
}

.faq-list {
  max-width: 800px;
  margin: 3rem auto 0;
}

.faq-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: 15px;
  margin-bottom: 1rem;
  overflow: hidden;
  transition: all 0.3s;
}

.faq-item.active {
  border-color: rgba(79, 172, 254, 0.5);
}

.faq-question {
  padding: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: all 0.3s;
}

.faq-question:hover {
  background: rgba(255, 255, 255, 0.05);
}

.faq-question h3 {
  font-size: 1.2rem;
  color: var(--text-primary);
  font-weight: 600;
}

.faq-toggle {
  font-size: 1.5rem;
  color: var(--text-secondary);
  transition: transform 0.3s;
  font-weight: 300;
}

.faq-item.active .faq-toggle {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

.faq-answer p {
  padding: 0 1.5rem 1.5rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* Footer */
.footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 2rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
  margin-bottom: 2rem;
}

.footer-section h3 {
  font-family: 'Playfair Display', serif;
  font-size: 1.5rem;
  margin-bottom: 1rem;
  background: var(--gradient-3);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-section h4 {
  color: var(--text-primary);
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.footer-section p {
  color: var(--text-secondary);
  line-height: 1.8;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 0.5rem;
}

.footer-section ul li a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.3s;
}

.footer-section ul li a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
}

/* Responsive Design */
@media (max-width: 968px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-title {
    font-size: 3rem;
  }

  .hero-stats {
    justify-content: center;
  }

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

  .order-content {
    grid-template-columns: 1fr;
  }

  .order-card {
    position: static;
  }

  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(15, 15, 30, 0.98);
    backdrop-filter: blur(10px);
    flex-direction: column;
    padding: 2rem;
    border-top: 1px solid var(--border-color);
    transform: translateX(-100%);
    transition: transform 0.3s;
    gap: 1rem;
  }

  .nav-menu.active {
    transform: translateX(0);
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.5rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .features-grid,
  .testimonials-grid {
    grid-template-columns: 1fr;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .product-visual {
    width: 300px;
    height: 300px;
  }

  .sphere {
    width: 200px;
    height: 200px;
  }
}