/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header Styles */
.header {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 0;
}

.header-content h1 {
    font-size: 3rem;
    font-weight: 700;
    color: white;
    margin-bottom: 10px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.header-content p {
    font-size: 1.2rem;
    color: rgba(255,255,255,0.9);
    font-weight: 300;
}

/* Main Content */
.main-content {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    overflow: hidden;
    margin-bottom: 40px;
}

/* Upload Section */
.upload-section {
    padding: 40px;
}

.upload-container {
    margin-bottom: 30px;
}

.upload-area {
    border: 3px dashed #667eea;
    border-radius: 15px;
    padding: 60px 20px;
    text-align: center;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    transition: all 0.3s ease;
    cursor: pointer;
}

.upload-area:hover {
    border-color: #764ba2;
    background: linear-gradient(135deg, #e8f2ff 0%, #b8d4f0 100%);
    transform: translateY(-2px);
}

.upload-area.dragover {
    border-color: #764ba2;
    background: linear-gradient(135deg, #e8f2ff 0%, #b8d4f0 100%);
    transform: scale(1.02);
}

.upload-icon {
    font-size: 4rem;
    color: #667eea;
    margin-bottom: 20px;
}

.upload-area h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: #333;
}

.upload-area p {
    color: #666;
    margin-bottom: 30px;
}

.upload-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.upload-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

/* Form Fields */
.form-fields {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

/* Center the single brand field */
.form-fields.single-centered {
    grid-template-columns: 1fr;
    justify-items: center;
}

.form-group.center-align {
    align-items: center;
    text-align: center;
    width: 100%;
    max-width: 520px;
}

.form-group.center-align input {
    text-align: center;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 600;
    margin-bottom: 8px;
    color: #333;
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-group input {
    padding: 15px;
    border: 2px solid #e1e5e9;
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
    background: white;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* Predict Button */
.predict-btn {
    width: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 20px;
    border-radius: 15px;
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.predict-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.predict-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Loading Section */
.loading-section {
    padding: 60px 40px;
    text-align: center;
}

.loading-container {
    max-width: 400px;
    margin: 0 auto;
}

.loading-spinner {
    font-size: 3rem;
    color: #667eea;
    margin-bottom: 20px;
}

.loading-section h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: #333;
}

.loading-section p {
    color: #666;
    margin-bottom: 30px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: #e1e5e9;
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    width: 0%;
    transition: width 0.3s ease;
}

@keyframes progress {
    0% { width: 0%; }
    50% { width: 70%; }
    100% { width: 100%; }
}

/* Results Section */
.results-section {
    padding: 40px;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.results-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: #333;
}

.new-analysis-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.new-analysis-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

/* Single Card Results Layout */
.single-result-card {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border-radius: 20px;
    padding: 40px;
    border: 2px solid #e2e8f0;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    position: relative;
    overflow: hidden;
    max-width: 600px;
    margin: 0 auto;
}

.single-result-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #10b981, #3b82f6, #8b5cf6, #f59e0b);
}

/* Result Header */
.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    gap: 20px;
}

.confidence-section h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.confidence-display {
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.confidence-percentage {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, #10b981, #3b82f6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.confidence-label {
    font-size: 1rem;
    color: #6b7280;
    font-weight: 500;
}

.performance-badge {
    padding: 15px 25px;
    border-radius: 15px;
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: white;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.performance-badge.excellent {
    background: linear-gradient(135deg, #10b981, #059669);
}

.performance-badge.poor {
    background: linear-gradient(135deg, #ef4444, #dc2626);
}

/* Key Metrics */
.key-metrics {
    display: flex;
    justify-content: space-around;
    margin-bottom: 30px;
    padding: 20px 0;
    border-top: 1px solid #e5e7eb;
    border-bottom: 1px solid #e5e7eb;
}

.metric-item {
    text-align: center;
    flex: 1;
}

.metric-label {
    display: block;
    font-size: 0.8rem;
    color: #6b7280;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 5px;
}

.metric-value {
    display: block;
    font-size: 1.1rem;
    font-weight: 700;
    color: #1f2937;
}

/* Result Footer */
.result-footer {
    text-align: center;
}

.prediction-context {
    margin-bottom: 20px;
    padding: 15px;
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    border: 2px solid #f59e0b;
    border-radius: 12px;
}

.prediction-context p {
    margin: 0;
    color: #92400e;
    font-size: 0.9rem;
    font-weight: 500;
}

.top-recommendation {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 15px 20px;
    background: linear-gradient(135deg, #e0f2fe, #b3e5fc);
    border: 2px solid #0ea5e9;
    border-radius: 12px;
    color: #0c4a6e;
    font-weight: 600;
}

.top-recommendation i {
    color: #0ea5e9;
    font-size: 1.1rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .single-result-card {
        padding: 25px;
        margin: 0 10px;
    }
    
    .result-header {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .confidence-percentage {
        font-size: 2.5rem;
    }
    
    .key-metrics {
        flex-direction: column;
        gap: 15px;
    }
}

/* Error Section */
.error-section {
    padding: 60px 40px;
    text-align: center;
}

.error-container {
    max-width: 400px;
    margin: 0 auto;
}

.error-icon {
    font-size: 4rem;
    color: #e74c3c;
    margin-bottom: 20px;
}

.error-section h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: #333;
}

.error-section p {
    color: #666;
    margin-bottom: 30px;
}

.retry-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.retry-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

/* Footer */
.footer {
    text-align: center;
    padding: 20px;
    color: rgba(255,255,255,0.8);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .header-content h1 {
        font-size: 2rem;
    }
    
    .upload-section,
    .results-section {
        padding: 20px;
    }
    
    .form-fields {
        grid-template-columns: 1fr;
    }
    
    .results-header {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .analysis-grid {
        grid-template-columns: 1fr;
    }
    
    .models-grid {
        grid-template-columns: 1fr;
    }
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.5s ease-out;
}

/* File Upload Styling */
.file-info {
    background: linear-gradient(135deg, #e8f2ff 0%, #b8d4f0 100%);
    border-radius: 10px;
    padding: 15px;
    margin-top: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.file-info i {
    color: #667eea;
    font-size: 1.2rem;
}

.file-name {
    font-weight: 500;
    color: #333;
}

.file-size {
    color: #666;
    font-size: 0.9rem;
}