body {
  margin: 0;
  padding-top: 75px; /* Fixed header için */
  font-family: 'Poppins', sans-serif;
  background: linear-gradient(135deg, #f0f9ff, #ecfdf5);
  color: #1f2937;
  line-height: 1.6;
}

.main-header {
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(15px);
  padding: 18px 0;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 20px rgba(14, 165, 233, 0.08);
  transition: all 0.3s ease;
  border-bottom: 3px solid #0ea5e9;
}

.main-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 90%;
  margin: auto;
}

.main-header a {
  text-decoration: none;
  color: #0ea5e9;
  font-weight: 600;
  transition: color 0.3s ease;
}

.main-header a:hover {
  color: #0284c7;
}

.main-header ul {
  display: flex;
  list-style: none;
  gap: 25px;
  margin: 0;
  padding: 0;
}

.hero {
  position: relative;
  height: 85vh;
  background: linear-gradient(135deg, #0ea5e9, #06b6d4, #10b981);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 20px;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="medical" width="25" height="25" patternUnits="userSpaceOnUse"><rect x="11" y="5" width="3" height="15" fill="rgba(255,255,255,0.05)"/><rect x="5" y="11" width="15" height="3" fill="rgba(255,255,255,0.05)"/></pattern></defs><rect width="100" height="100" fill="url(%23medical)"/></svg>');
  opacity: 0.3;
}

.hero-content {
  position: relative;
  z-index: 100;
  max-width: 800px;
  margin: 0 auto;
  width: 100%;
  text-align: center;
}

.hero-content h1 {
  font-size: 3rem;
  margin-bottom: 20px;
  font-weight: 700;
  color: #FFFFFF;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero-content p {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 30px;
  line-height: 1.6;
  text-align: center;
  margin-left: auto;
  margin-right: auto;
  max-width: 600px;
}

.hero .btn {
  background: linear-gradient(135deg, #ffffff, #f8fafc);
  color: #0ea5e9;
  padding: 15px 35px;
  border-radius: 35px;
  text-decoration: none;
  transition: all 0.3s ease;
  box-shadow: 0 6px 20px rgba(255, 255, 255, 0.3);
  font-weight: 600;
  font-size: 1.1rem;
}

.hero .btn:hover {
  background: linear-gradient(135deg, #f8fafc, #f1f5f9);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(255, 255, 255, 0.4);
}

.features, .pricing, .features-special, .security {
  padding: 80px 0;
}

.features {
  background: #FFFFFF;
}

.features-special {
  background: linear-gradient(135deg, #f0f9ff, #ecfdf5);
}

.security {
  background: linear-gradient(135deg, #eff6ff, #f0fdf4);
}

.features h2, .pricing h2, .features-special h2, .security h2 {
  text-align: center;
  color: #0ea5e9;
  margin-bottom: 50px;
  font-weight: 700;
  font-size: 2.5rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  width: 90%;
  margin: auto;
  max-width: 1200px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 25px;
  width: 90%;
  margin: auto;
  max-width: 1000px;
}

.security-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  width: 90%;
  margin: auto;
  max-width: 800px;
}

.card, .paket {
  background: #FFFFFF;
  padding: 35px 25px;
  border-radius: 20px;
  transition: all 0.4s ease;
  box-shadow: 0 5px 25px rgba(14, 165, 233, 0.08);
  border: 2px solid transparent;
  position: relative;
}

.card {
  text-align: center;
}

.card-icon {
  font-size: 3rem;
  margin-bottom: 20px;
  display: block;
  animation: pulse-health 2s ease-in-out infinite;
}

@keyframes pulse-health {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.card h3 {
  color: #0ea5e9;
  margin-bottom: 15px;
  font-size: 1.3rem;
  font-weight: 600;
}

.card:hover, .paket:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 40px rgba(14, 165, 233, 0.15);
  border-color: #38bdf8;
}

.feature-item, .security-item {
  background: #FFFFFF;
  padding: 25px;
  border-radius: 15px;
  text-align: center;
  box-shadow: 0 4px 15px rgba(14, 165, 233, 0.08);
  transition: all 0.3s ease;
  border: 1px solid rgba(56, 189, 248, 0.1);
}

.feature-item:hover, .security-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(14, 165, 233, 0.12);
  border-color: rgba(56, 189, 248, 0.3);
}

.feature-item h3, .security-item h3 {
  color: #0ea5e9;
  margin-bottom: 10px;
  font-size: 1.1rem;
  font-weight: 600;
}

.security-icon {
  font-size: 2.5rem;
  margin-bottom: 15px;
  display: block;
  color: #10b981;
}

.paket-header {
  text-align: center;
  margin-bottom: 25px;
  padding-bottom: 20px;
  border-bottom: 2px solid #f1f5f9;
}

.paket h3 {
  color: #0ea5e9;
  margin-bottom: 10px;
  font-size: 1.4rem;
  font-weight: 600;
}

.price {
  font-size: 2.2rem;
  color: #10b981;
  font-weight: 700;
  margin: 10px 0;
}

.paket ul {
  list-style: none;
  padding: 0;
  margin: 20px 0;
}

.paket li {
  padding: 8px 0;
  position: relative;
  padding-left: 25px;
}

.paket li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: #10b981;
  font-weight: bold;
  font-size: 1.1rem;
}

.paket .btn {
  background: linear-gradient(135deg, #0ea5e9, #0284c7);
  color: #FFFFFF;
  padding: 12px 25px;
  border-radius: 25px;
  text-decoration: none;
  transition: all 0.3s ease;
  display: inline-block;
  width: 100%;
  text-align: center;
  box-sizing: border-box;
  font-weight: 600;
}

.paket .btn:hover {
  background: linear-gradient(135deg, #0284c7, #0369a1);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(14, 165, 233, 0.3);
}

.paket.premium {
  border: 3px solid #10b981;
  background: linear-gradient(145deg, #FFFFFF, #f0fdf4);
  position: relative;
}

.paket.premium::before {
  content: '⚕️ EN POPÜLER';
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #10b981, #059669);
  color: #FFFFFF;
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 700;
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

/* Partikül canvas pozisyonlama */
.particle-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

/* Fade-in animasyonu */
section {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease-out;
}

section.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Container sınıfı */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Sağlık sektörüne özel animasyonlar */
.heartbeat {
  animation: heartbeat 1.5s ease-in-out infinite;
}

@keyframes heartbeat {
  0%, 100% { transform: scale(1); }
  25% { transform: scale(1.1); }
  50% { transform: scale(1); }
  75% { transform: scale(1.05); }
}

/* Trust indicators */
.trust-badge {
  background: linear-gradient(135deg, #ecfdf5, #f0f9ff);
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: 12px;
  padding: 15px;
  text-align: center;
  margin: 10px 0;
}

/* Responsive düzeltmeler */
@media (max-width: 768px) {
  body {
    padding-top: 70px;
  }
  
  .hero {
    height: 75vh;
    padding: 0 15px;
  }
  
  .hero-content h1 {
    font-size: 2.2rem;
  }
  
  .hero-content p {
    font-size: 1rem;
  }
  
  .main-header .container {
    width: 95%;
  }
  
  .grid, .features-grid, .security-grid {
    grid-template-columns: 1fr;
    width: 95%;
  }
  
  .features, .pricing, .features-special, .security {
    padding: 60px 0;
  }
  
  .features h2, .pricing h2, .features-special h2, .security h2 {
    font-size: 2rem;
  }
  
  .card, .paket {
    padding: 25px 20px;
  }
}

@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 1.8rem;
  }
  
  .hero-content p {
    font-size: 0.95rem;
  }
  
  .main-header ul {
    gap: 15px;
  }
  
  .paket.premium::before {
    font-size: 0.75rem;
    padding: 6px 15px;
  }
  
  .card-icon {
    font-size: 2.5rem;
  }
}

footer {
  background: linear-gradient(135deg, #0ea5e9, #10b981);
  border-top: 3px solid #38bdf8;
  text-align: center;
  padding: 25px 0;
  color: #FFFFFF;
}