body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background: #fff;
  color: #333;
}
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 5%;
  background-color: #fff;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
.logo {
  height: 60px;
}
.nav a {
  margin-left: 20px;
  text-decoration: none;
  color: #333;
  font-weight: 500;
}
.login-btn {
  background: #ba0c2f;
  color: white;
  padding: 8px 16px;
  border-radius: 5px;
  margin-left: 20px;
}
.hero {
  position: relative;
}
.hero-img {
  width: 100%;
  max-height: 450px;
  object-fit: cover;
}
.tagline {
  position: absolute;
  bottom: 30px;
  left: 5%;
  color: white;
  font-size: 2em;
  font-weight: bold;
  text-shadow: 1px 1px 4px #000;
}
.calculator {
  display: flex;
  justify-content: center;
  padding: 40px 20px;
  background: #f8f9fa;
}
.calculator-box {
  background: white;
  padding: 30px;
  border-radius: 16px;
  max-width: 700px;
  width: 100%;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}
.calculator-box h2 {
  margin-top: 0;
}
.calculator-box label {
  display: block;
  margin-top: 15px;
  font-weight: bold;
}
.calculator-box select {
  width: 100%;
  padding: 10px;
  margin-top: 5px;
  border-radius: 8px;
  border: 1px solid #ccc;
}
.row {
  display: flex;
  gap: 20px;
  margin-top: 20px;
}
.row .from, .row .to {
  flex: 1;
}
.calculate-btn {
  margin-top: 25px;
  width: 100%;
  padding: 14px;
  font-size: 16px;
  font-weight: bold;
  background-color: #f26522;
  color: white;
  border: none;
  border-radius: 30px;
  cursor: pointer;
}
@media (max-width: 768px) {
  .row {
    flex-direction: column;
  }
  .tagline {
    font-size: 1.2em;
    left: 10px;
    bottom: 15px;
  }
}