body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f5f5f5;
}

.header {
  text-align: center;
  background: #2c3e50;
  color: #fff;
  padding: 15px 10px;
}

.header h1 {
  margin: 5px 0;
}

.header h2 {
  margin: 0;
  font-size: 16px;
}

.container {
  max-width: 900px;
  margin: 20px auto;
  padding: 0 10px;
}

.hero {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  background: #fff;
  padding: 20px;
  border-radius: 8px;
}

.hero-image {
  max-width: 350px;
  width: 100%;
  border-radius: 8px;
  object-fit: cover;
}

.hero-text {
  flex: 1;
}

.buttons {
  margin-top: 15px;
}

.btn {
  display: inline-block;
  padding: 8px 16px;
  background: #3498db;
  color: #fff;
  text-decoration: none;
  border-radius: 4px;
  margin-right: 10px;
}

.btn:hover {
  background: #2980b9;
}

/* Password overlay */
#protect-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
}

#protect-box {
  background: #fff;
  padding: 20px;
  border-radius: 8px;
  width: 280px;
  text-align: center;
}

input, select {
  width: 100%;
  padding: 6px 8px;
  margin: 6px 0 12px 0;
  box-sizing: border-box;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 15px;
}

.card {
  background: #fff;
  border-radius: 8px;
  padding: 12px;
  box-shadow: 0 0 4px rgba(0,0,0,0.1);
  cursor: pointer;
}

.card h3 {
  margin: 0 0 6px 0;
}

/* Popup */
#popup {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

#popup-content {
  background: #fff;
  padding: 20px;
  border-radius: 8px;
  max-width: 400px;
  width: 90%;
}

#popup-content h3 {
  margin-top: 0;
}

.close-btn {
  background: #e74c3c;
  color: #fff;
  border: none;
  padding: 6px 12px;
  border-radius: 4px;
  cursor: pointer;
}

/* Bill form */
.bill-form {
  background: #fff;
  padding: 15px;
  border-radius: 8px;
}

.form-row {
  display: flex;
  gap: 10px;
}

.form-row > div {
  flex: 1;
}

@media (max-width: 600px) {
  .hero {
    flex-direction: column;
  }
  .form-row {
    flex-direction: column;
  }
}