/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background-color: #f9f9f9;
  color: #333;
  line-height: 1.6;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
}

/* Header */
.site-header {
  background-color: #fff;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 999;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  height: 120px;
}

nav a {
  color: #333;
  text-decoration: none;
  margin-left: 1.5rem;
  font-weight: 600;
  transition: color 0.3s;
}

nav a:hover {
  color: #ffffff;
}

/* Hero */
.hero {
  background: url('banner.jpg') center/cover no-repeat;
  color: #fff;
  text-align: center;
  padding: 6rem 1rem 3rem;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  color: #000;
}

.hero p {
  font-size: 1.25rem;
  max-width: 600px;
  margin: 0 auto 2rem;
  color: #000;
}

.cta {
  background: #000000;
  color: white;
  padding: 0.75rem 2rem;
  border: none;
  border-radius: 6px;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.3s;
}

.cta:hover {
  background: #000000;
}

/* Estimator Section */
.estimator-section {
  background-color: #fff;
  padding: 3rem 1rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  margin-top: -50px;
  border-radius: 12px;
}

.estimator-section h2 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 1rem;
}

.estimator-section form {
  display: grid;
  gap: 1rem;
  max-width: 700px;
  margin: 0 auto;
}

input,
select,
button {
  padding: 0.75rem;
  border-radius: 8px;
  border: 1px solid #ddd;
  font-size: 1rem;
  width: 100%;
}

button {
  background-color: #000;
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.3s;
}

button:hover {
  background-color: #333;
}

/* Features */
.features {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2rem;
  margin-top: 3rem;
}

.feature-box {
  background: #fff;
  padding: 2rem;
  text-align: center;
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
  flex: 1 1 250px;
  max-width: 300px;
}

.feature-box h3 {
  color: #000000;
  margin-bottom: 1rem;
}

/* Referral */
.referral {
  background-color: #fff;
  margin-top: 4rem;
  padding: 3rem 1rem;
  text-align: center;
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.cta-outline {
  display: inline-block;
  margin-top: 1rem;
  border: 2px solid #0070f3;
  padding: 0.75rem 1.5rem;
  color: #0070f3;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s;
}

.cta-outline:hover {
  background-color: #000000;
  color: #fff;
}

/* Footer */
.site-footer {
  background-color: #000;
  color: #fff;
  text-align: center;
  padding: 2rem 1rem;
  margin-top: 4rem;
}

/* Responsive */
@media (max-width: 768px) {
  .site-header .container {
    flex-direction: column;
    align-items: flex-start;
  }
  .features {
    flex-direction: column;
    align-items: center;
  }
  .hero h1 {
    font-size: 2.25rem;
  }
  .hero p {
    font-size: 1rem;
  }
}