html {
  font-family: Arial, sans-serif;
  background-color: #f4f4f4;
}
body {
  margin: 20px;
  line-height: 1.6;
}
.navbar {
  background-color: #007bff;
  color: white;
  padding: 10px;
}
.footer {
  margin-top: 20px;
  text-align: center;
  color: #666;
}

/* Progress Indicator */
.progress-indicator {
    display: flex;
    justify-content: space-between;
    margin: 2rem 0;
    position: relative;
}

.progress-indicator::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 0;
    right: 0;
    height: 2px;
    background: #e2e8f0;
    z-index: -1;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
}

.step-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #e2e8f0;
    color: #64748b;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    margin-bottom: 0.5rem;
    transition: all 0.3s;
}

.step.active .step-number {
    background: #3b82f6;
    color: white;
}

.step.completed .step-number {
    background: #10b981;
    color: white;
}

/* Method Selector */
.method-selector {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.method-card {
    background: white;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
}

.method-card:hover {
    border-color: #3b82f6;
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(59, 130, 246, 0.1);
}

.method-card i {
    font-size: 3rem;
    color: #3b82f6;
    margin-bottom: 1rem;
}

/* Upload Zone */
.upload-zone {
    border: 3px dashed #cbd5e1;
    border-radius: 12px;
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
}

.upload-zone:hover {
    border-color: #3b82f6;
    background: #f0f9ff;
}

.upload-zone i {
    font-size: 4rem;
    color: #3b82f6;
    margin-bottom: 1rem;
}

/* Loading Spinner */
.loading {
    text-align: center;
    padding: 2rem;
}

.spinner {
    border: 4px solid #f3f4f6;
    border-top: 4px solid #3b82f6;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Form Groups */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #1e293b;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

/* Classification Result */
.classification-result {
    background: #f0f9ff;
    border-left: 4px solid #3b82f6;
    padding: 1.5rem;
    margin: 1.5rem 0;
    border-radius: 8px;
}

.classification-result h4 {
    color: #1e40af;
    margin-bottom: 1rem;
}

/* Total Display */
.total-display {
    background: #ecfdf5;
    border: 2px solid #10b981;
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1.5rem 0;
}

.total-display h4 {
    color: #047857;
    margin: 0;
}

/* Success Message */
.result-section {
    text-align: center;
}

.success-message {
    background: #ecfdf5;
    border-radius: 12px;
    padding: 3rem;
    margin: 2rem 0;
}

.success-message i {
    font-size: 4rem;
    color: #10b981;
    margin-bottom: 1rem;
}

.success-message h2 {
    color: #047857;
    margin-bottom: 0.5rem;
}

/* Next Steps */
.next-steps {
    background: white;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 2rem;
    margin: 2rem 0;
    text-align: left;
}

.next-steps ol {
    margin-left: 1.5rem;
}

.next-steps li {
    margin-bottom: 0.5rem;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

/* Error States */
.error {
    color: #dc2626;
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.info {
    color: #0891b2;
    font-size: 0.875rem;
    margin-top: 0.25rem;
}