* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}


body {
  min-height: 100vh;
  background:
    linear-gradient(rgba(0,0,0,0.55), rgba(0,0,0,0.55)),
    url("background.jpg") no-repeat center center / cover;
  color: #fff;
}

/* HEADER */
.header {
  padding: 20px 40px;
  background: rgba(0, 0, 0, 0.5);
}

.logo-box {
  display: flex;
  align-items: center;
  gap: 15px;
}

.logo-img {
  width: 70px;
}

.logo-text h1 {
  font-size: 26px;
}

.logo-text p {
  font-size: 14px;
  opacity: 0.9;
}


.main-nav {
  display: flex;
  justify-content: center;
  gap: 25px;
  padding: 15px;
  background: rgba(0, 0, 0, 0.6);
}

.main-nav a {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
  transition: 0.3s;
}
.main-nav a.active {
  color: #4da6ff;
  border-bottom: 2px solid #4da6ff;
  padding-bottom: 4px;
}


.main-nav a:hover {
  color: #4da6ff;
}


.hero {
  height: 20vh;
  display: flex;
  align-items: center;
  justify-content: center;
}


.auth-buttons {
  display: flex;
  gap: 20px;
}

.btn {
  padding: 12px 25px;
  background: #4da6ff;
  color: #fff;
  text-decoration: none;
  border-radius: 6px;
  transition: 0.3s;
}

.btn:hover {
  background: #1e88e5;
}

.btn-secondary {
  background: #2ecc71;
}

.btn-secondary:hover {
  background: #27ae60;
}


.container {
  max-width: 1100px;
  margin: 40px auto;
  padding: 30px;
  background: rgba(0, 0, 0, 0.65);
  border-radius: 12px;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.6);
}

.container p {
  line-height: 1.6;
}


.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.card {
  padding: 20px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  text-align: center;
  transition: 0.3s;
}

.card:hover {
  background: rgba(255, 255, 255, 0.25);
}


.doctor-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 25px;
  margin-top: 20px;
}

.doctor-card {
  background: #ffffff;
  padding: 20px;
  border-radius: 8px;
  border-left: 5px solid #4da6ff;
  box-shadow: 0 4px 10px rgba(0,0,0,0.15);
  color: #333;
  transition: transform 0.3s, box-shadow 0.3s;
}

.doctor-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 18px rgba(0,0,0,0.25);
}

.doctor-card h3 {
  color: #004080;
  margin-bottom: 10px;
}

.doctor-card p {
  font-size: 14px;
}


.site-footer {
  text-align: center;
  padding: 15px;
  background: rgba(0, 0, 0, 0.7);
  font-size: 14px;
  color: #fff;
  margin-top: 40px;
}
@media (max-width: 768px) {

  .header {
    padding: 15px 20px;
  }

  .logo-box {
    flex-direction: column;
    text-align: center;
  }

  .main-nav {
    flex-wrap: wrap;
    gap: 15px;
  }

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

  .container {
    margin: 20px;
    padding: 20px;
  }
}