/* Basic Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Body Styles */
body {
  font-family: 'Inter', Arial, Helvetica, sans-serif;
  background-color: #f7f7f7;
  color: #333;
  line-height: 1.6;
  padding: 20px;
}

/* Main Wrapper */
.hb-root {
  max-width: 760px;
  margin: 24px auto;
  padding: 18px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
  font-family: 'Inter', Arial, Helvetica, sans-serif;
}

.hb-root h1 {
  color: #0b5ea8;
  text-align: center;
  margin-bottom: 16px;
  font-size: 24px;
  font-weight: 700;
}

/* Intro Section */
.hb-intro {
  background: #f6f9ff;
  border-left: 4px solid #6b8ef1;
  padding: 10px 12px;
  margin-bottom: 14px;
  font-size: 14px;
  color: #333;
}

/* Card Styles */
.hb-card {
  padding: 12px;
}

.hb-row input {
  width: 48%;
  display: inline-block;
  margin-right: 4%;
  padding: 12px;
  border-radius: 8px;
  border: 1px solid #e6eef9;
  box-sizing: border-box;
  font-size: 16px;
}

.hb-card label {
  display: block;
  margin: 10px 0;
  font-weight: 600;
  font-size: 16px;
}

.hb-help {
  font-size: 13px;
  color: #666;
  margin-top: 6px;
}

.hb-btn {
  width: 100%;
  padding: 14px;
  background: #0b5ea8;
  color: #fff;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 700;
  font-size: 16px;
  transition: background-color 0.3s ease;
  margin-top: 10px;
}

.hb-btn:hover {
  background-color: #006bb3;
  transform: translateY(-2px);
}

/* Result Section */
.hb-result {
  margin-top: 16px;
  padding: 20px;
  border-radius: 10px;
  background: #f7fbff;
  border: 1px solid #eaf6ff;
  display: none;
  opacity: 0;
  animation: fadeIn 1s ease-in-out forwards;
}

.hb-summary {
  margin-top: 8px;
  font-size: 16px;
  color: #222;
}

.hb-msg {
  margin-top: 6px;
  color: #333;
}

.hb-breakdown h3,
.hb-tips h3 {
  margin-top: 12px;
  color: #0b5ea8;
  font-size: 18px;
  font-weight: 600;
}

.hb-breakdown ul,
.hb-tips ol {
  padding-left: 18px;
  color: #333;
}

.hb-tips li {
  margin-bottom: 10px;
}

.hb-note-small {
  margin-top: 12px;
  font-size: 13px;
  color: #666;
  text-align: center;
}

/* Fade-In Animation */
@keyframes fadeIn {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}

/* Mobile Responsiveness */
@media (max-width: 760px) {
  .hb-row input {
    width: 100%;
    display: block;
    margin-right: 0;
    margin-bottom: 8px;
  }

  .hb-btn {
    padding: 14px;
    font-size: 18px;
  }

  .hb-card label {
    font-size: 14px;
  }

  .hb-summary {
    font-size: 14px;
  }

  .hb-msg {
    font-size: 14px;
  }

  .hb-breakdown li {
    font-size: 14px;
  }

  .hb-tips li {
    font-size: 14px;
  }
}

@media (max-width: 480px) {
  .hb-btn {
    font-size: 16px;
    padding: 12px;
  }

  .hb-row input {
    padding: 12px;
    font-size: 16px;
  }

  .hb-summary,
  .hb-msg,
  .hb-breakdown li,
  .hb-tips li {
    font-size: 16px;
  }
}