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

.container-gst-calculator {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: #fffbe9;
  min-height: 100vh;
  padding: 20px;
  line-height: 1.6;
}
.container-gst-calculator .containerr {
  max-width: 800px;
  margin: 0 auto;
  background: white;
  border-radius: 20px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.07);
  overflow: hidden;
}
.container-gst-calculator .headerr {
  background: linear-gradient(135deg, #ffd88a 0%, #de9406 100%);
  color: #fff;
  text-align: center;
  padding: 30px 20px;
}
.container-gst-calculator .headerr h1 {
  font-size: 2.5rem;
  margin-bottom: 10px;
  font-weight: 700;
}
.container-gst-calculator .headerr p {
  font-size: 1.1rem;
  opacity: 0.9;
}
.container-gst-calculator .calculator-section {
  padding: 40px 30px;
  display: flex;
  flex-direction: column;
}
.container-gst-calculator .input-group {
  margin-bottom: 25px;
}
.container-gst-calculator .input-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: #333;
  font-size: 1.1rem;
}
.container-gst-calculator .input-field {
  width: 100%;
  padding: 15px;
  border: 2px solid #ffe2b8;
  border-radius: 10px;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  background: #fff8ee;
}
.container-gst-calculator .input-field:focus {
  outline: none;
  border-color: #de9406;
  background: white;
  box-shadow: 0 0 0 3px rgba(222, 148, 6, 0.1);
}
.container-gst-calculator .radio-group {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 15px;
}
.container-gst-calculator .radio-option {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border: 2px solid #ffe2b8;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.3s ease;
  background: #fff8ee;
  flex: 1;
  min-width: 120px;
  justify-content: center;
}
.container-gst-calculator .radio-option:hover {
  border-color: #de9406;
  background: #fff3d1;
}
.container-gst-calculator .radio-option input[type=radio] {
  margin: 0;
}
.container-gst-calculator .radio-option input[type=radio]:checked + label,
.container-gst-calculator .radio-option:has(input[type=radio]:checked) {
  border-color: #de9406;
  background: #de9406;
  color: white;
}
.container-gst-calculator .radio-option label {
  margin: 0;
  cursor: pointer;
  font-weight: 500;
}
.container-gst-calculator .result-section {
  background: linear-gradient(135deg, #ffe2b8 0%, #de9406 100%);
  color: #fff;
  padding: 30px;
  margin: 30px 0;
  border-radius: 15px;
  text-align: center;
}
.container-gst-calculator .result-display {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 15px;
  font-size: 1.2rem;
  font-weight: 500;
}
.container-gst-calculator .result-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
}
.container-gst-calculator .result-label {
  font-size: 0.9rem;
  opacity: 0.9;
}
.container-gst-calculator .result-value {
  font-size: 1.3rem;
  font-weight: 700;
}
.container-gst-calculator .result-item.total {
  font-size: 1.4rem;
  font-weight: 700;
  border-top: 2px solid rgba(255, 255, 255, 0.3);
  padding-top: 15px;
  margin-top: 20px;
}
.container-gst-calculator .operator {
  font-size: 1.8rem;
  font-weight: bold;
  color: #de9406;
  margin: 0 10px;
}
.container-gst-calculator .total-result {
  border-left: 2px solid rgba(255, 255, 255, 0.3);
  padding-left: 15px;
  margin-left: 10px;
}
.container-gst-calculator .info-section {
  background: #fff8ee;
  padding: 40px 30px;
  border-top: 1px solid #ffe2b8;
}
.container-gst-calculator .custom-input-container {
  margin-top: 15px;
  animation: slideDown 0.3s ease;
}
.container-gst-calculator .custom-gst-input {
  border: 2px solid #de9406;
  background: #fff3d1;
}
.container-gst-calculator .custom-gst-input:focus {
  border-color: #de9406;
  box-shadow: 0 0 0 3px rgba(222, 148, 6, 0.1);
}
.container-gst-calculator .custom-option {
  background: linear-gradient(135deg, #ffd88a 0%, #de9406 100%);
  color: white;
  border-color: #de9406;
}
.container-gst-calculator .custom-option:hover {
  background: linear-gradient(135deg, #de9406 0%, #ffd88a 100%);
  border-color: #de9406;
}
.container-gst-calculator .custom-option input[type=radio]:checked + label,
.container-gst-calculator .custom-option:has(input[type=radio]:checked) {
  background: linear-gradient(135deg, #de9406 0%, #ffd88a 100%);
  border-color: #de9406;
}
@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.container-gst-calculator .info-section h2 {
  color: #333;
  margin-bottom: 20px;
  font-size: 1.8rem;
  text-align: center;
}
.container-gst-calculator .info-content {
  margin-bottom: 30px;
}
.container-gst-calculator .info-content h3 {
  color: #de9406;
  margin-bottom: 15px;
  font-size: 1.4rem;
}
.container-gst-calculator .steps {
  background: white;
  padding: 25px;
  border-radius: 10px;
  margin: 20px 0;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}
.container-gst-calculator .steps ol {
  padding-left: 20px;
}
.container-gst-calculator .steps li {
  margin: 10px 0;
  font-size: 1.1rem;
}
.container-gst-calculator .formula-section {
  background: white;
  padding: 25px;
  border-radius: 10px;
  margin: 20px 0;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}
.container-gst-calculator .formula {
  background: #fff8ee;
  padding: 15px;
  border-radius: 8px;
  margin: 10px 0;
  font-family: "Courier New", monospace;
  border-left: 4px solid #de9406;
}
.container-gst-calculator .example-table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  background: white;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}
.container-gst-calculator .example-table th,
.container-gst-calculator .example-table td {
  padding: 15px;
  text-align: left;
  border-bottom: 1px solid #ffe2b8;
}
.container-gst-calculator .example-table th {
  background: #de9406;
  color: white;
  font-weight: 600;
}
.container-gst-calculator .example-table tr:last-child td {
  border-bottom: none;
}
.container-gst-calculator .example-table tr:nth-child(even) {
  background: #fff8ee;
}
.container-gst-calculator {
  /* Responsive Design */
}
@media (max-width: 768px) {
  .container-gst-calculator .container {
    margin: 10px;
    border-radius: 15px;
  }
  .container-gst-calculator .headerr h1 {
    font-size: 2rem;
  }
  .container-gst-calculator .calculator-section,
  .container-gst-calculator .info-section {
    padding: 25px 20px;
  }
  .container-gst-calculator .radio-group {
    grid-template-columns: repeat(2, 1fr);
  }
  .container-gst-calculator .radio-option {
    min-width: auto;
  }
  .container-gst-calculator .result-item {
    font-size: 1.1rem;
    flex-direction: column;
    gap: 5px;
    text-align: center;
  }
  .container-gst-calculator .result-display {
    font-size: 1.1rem;
    gap: 10px;
  }
  .container-gst-calculator .result-value {
    font-size: 1.2rem;
  }
  .container-gst-calculator .result-item.total {
    font-size: 1.3rem;
  }
  .container-gst-calculator .operator {
    font-size: 1.5rem;
    margin: 0 5px;
  }
  .container-gst-calculator .custom-input-container {
    margin-top: 10px;
  }
  .container-gst-calculator .custom-gst-input {
    padding: 12px;
    font-size: 1rem;
  }
}
@media (max-width: 480px) {
  .container-gst-calculator .custom-input-container {
    margin-top: 8px;
  }
  .container-gst-calculator body {
    padding: 10px;
  }
  .container-gst-calculator .headerr {
    padding: 20px 15px;
  }
  .container-gst-calculator .headerr h1 {
    font-size: 1.8rem;
  }
  .container-gst-calculator .calculator-section,
  .container-gst-calculator .info-section {
    padding: 20px 15px;
  }
  .container-gst-calculator .input-field {
    padding: 12px;
    font-size: 1rem;
  }
  .container-gst-calculator .result-section {
    padding: 20px;
  }
  .container-gst-calculator .steps,
  .container-gst-calculator .formula-section {
    padding: 20px;
  }
  .container-gst-calculator .result-display {
    flex-direction: column;
    gap: 15px;
  }
  .container-gst-calculator .result-display .operator {
    transform: rotate(90deg);
    margin: 5px 0;
  }
  .container-gst-calculator .total-result {
    border-left: none;
    border-top: 2px solid rgba(255, 255, 255, 0.3);
    padding-left: 0;
    padding-top: 15px;
    margin-left: 0;
    margin-top: 10px;
  }
  .container-gst-calculator .radio-group {
    grid-template-columns: 1fr;
  }
}