:root {
  --primary: #4361ee;
  --secondary: #3f37c9;
  --light: #f8f9fa;
  --dark: #1a1a2e;
  --border-radius: 12px;
  --box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
  --transition: all 0.3s ease;
}

body {
  font-family: 'Poppins', sans-serif;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  color: var(--dark);
  margin: 0;
  padding: 0;
  min-height: 100vh;
}

/* Main Calculator Container */
.tool-container {
  background: #fff;
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--box-shadow);
}

/* Heading */
.tool-container h2 {
  font-size: 1.8rem;
  color: var(--secondary);
  text-align: center;
}

/* Input Group Fields */
.input-group .form-control,
input.form-control {
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.input-group .form-control:focus,
input.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(67, 97, 238, 0.2);
  outline: none;
}

/* Buttons */
button.btn-primary {
  background-color: var(--primary);
  border-color: var(--primary);
  border-radius: var(--border-radius);
  font-weight: 600;
  transition: var(--transition);
}

button.btn-primary:hover {
  background-color: var(--secondary);
  border-color: var(--secondary);
  transform: translateY(-2px);
}

/* Result Display Box */
.badge-result {
  display: inline-block;
  background: #e6f4ea;
  color: #1a1a1a;
  padding: 1rem 2rem;
  border-radius: var(--border-radius);
  font-size: 1.1rem;
  font-weight: 500;
  box-shadow: var(--box-shadow);
  margin-top: 1rem;
}

/* Alert Box */
#alertBox {
  border-radius: var(--border-radius);
  font-weight: 500;
}

/* Info Block */
.info-block {
  background-color: #f8f9fa;
  border: 1px solid #dee2e6;
  border-left: 5px solid #ffc107;
  border-radius: var(--border-radius);
  padding: 2rem;
  margin-top: 2rem;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
}

.info-block h4 {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.info-block p {
  font-size: 1rem;
  color: #333;
  line-height: 1.6;
}

.info-block ul {
  padding-left: 1.2rem;
}

.info-block ul li {
  list-style: none;
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.5rem;
  color: #555;
}

.info-block ul li::before {
  content: "💡";
  position: absolute;
  left: 0;
  top: 0;
}

/* Disclaimer Box */
.bg-warning-subtle {
  background-color: #fff7e6 !important;
}

.border-warning {
  border-color: #f0ad4e !important;
}

.disclaimer-box {
  border-radius: var(--border-radius);
  font-weight: 500;
  font-size: 0.95rem;
  margin-top: 2rem;
}

/* Sidebar Boxes */
.ad-box {
  background: #fff;
  border-radius: var(--border-radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--box-shadow);
}

.ad-box h5 {
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 1rem;
}

.ad-placeholder {
  background: #f1f3f5;
  border: 2px dashed #ccc;
  padding: 2rem;
  border-radius: var(--border-radius);
  text-align: center;
  color: #777;
}

/* List Group */
.list-group-item {
  font-size: 0.95rem;
  color: #555;
}

/* Responsive Adjustments */
@media (max-width: 576px) {
  .tool-container {
    padding: 1.5rem 1rem;
  }

  .badge-result {
    font-size: 1rem;
    padding: 0.75rem 1.25rem;
  }

  .info-block {
    padding: 1.5rem 1rem;
  }
}