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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px;
    text-align: center;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    font-weight: 700;
}

.subtitle {
    font-size: 1.1em;
    opacity: 0.9;
}

.main-content {
    padding: 40px;
}

.input-section {
    margin-bottom: 30px;
}

.input-section h2 {
    color: #667eea;
    margin-bottom: 10px;
    font-size: 1.8em;
}

.info {
    color: #666;
    margin-bottom: 20px;
    font-size: 0.95em;
}

.input-options {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-secondary {
    background: #f0f0f0;
    color: #333;
}

.btn-secondary:hover {
    background: #e0e0e0;
    transform: translateY(-2px);
}

.data-input-container {
    background: #f8f9fa;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 15px;
    max-height: 400px;
    overflow-y: auto;
}

.data-inputs {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 10px;
}

.data-input-item {
    display: flex;
    flex-direction: column;
}

.data-input-item label {
    font-size: 0.85em;
    color: #666;
    margin-bottom: 5px;
    font-weight: 500;
}

.data-input-item input {
    padding: 10px;
    border: 2px solid #ddd;
    border-radius: 6px;
    font-size: 1em;
    transition: border-color 0.3s;
}

.data-input-item input:focus {
    outline: none;
    border-color: #667eea;
}

.input-summary {
    text-align: center;
    color: #666;
    font-weight: 600;
    font-size: 1.1em;
}

.action-section {
    text-align: center;
    margin: 30px 0;
}

#predictBtn {
    padding: 15px 40px;
    font-size: 1.2em;
    min-width: 200px;
}

.spinner {
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top: 3px solid white;
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
    display: inline-block;
}

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

.result-section {
    margin-top: 30px;
    animation: fadeIn 0.5s ease;
}

.result-section h2 {
    color: #667eea;
    margin-bottom: 20px;
    font-size: 1.8em;
}

.result-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.result-value {
    margin-bottom: 15px;
}

.result-label {
    display: block;
    font-size: 1.1em;
    opacity: 0.9;
    margin-bottom: 10px;
}

.result-number {
    display: block;
    font-size: 3em;
    font-weight: 700;
    margin-top: 10px;
}

.result-message {
    font-size: 1em;
    opacity: 0.9;
    margin-top: 10px;
}

.error-section {
    margin-top: 20px;
    animation: fadeIn 0.5s ease;
}

.error-message {
    background: #fee;
    color: #c33;
    padding: 15px;
    border-radius: 8px;
    border-left: 4px solid #c33;
    font-weight: 500;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

footer {
    background: #f8f9fa;
    padding: 20px;
    text-align: center;
    color: #666;
    font-size: 0.9em;
}

/* Scrollbar styling */
.data-input-container::-webkit-scrollbar {
    width: 8px;
}

.data-input-container::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

.data-input-container::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 10px;
}

.data-input-container::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* Responsive design */
@media (max-width: 768px) {
    header h1 {
        font-size: 2em;
    }

    .main-content {
        padding: 20px;
    }

    .data-inputs {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }

    .input-options {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}