:root {
    --primary-color: #f6821f;
    --secondary-color: #003682;
    --background-color: #f5f5f5;
    --text-color: #333;
    --border-color: #ddd;
    --success-color: #4caf50;
    --warning-color: #ff9800;
    --danger-color: #f44336;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.upload-container {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 2rem;
    margin-bottom: 2rem;
}

.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.upload-area:hover {
    border-color: var(--primary-color);
}

.upload-area.dragover {
    background-color: rgba(246, 130, 31, 0.05);
    border-color: var(--primary-color);
}

#upload-icon {
    width: 64px;
    height: 64px;
    margin-bottom: 1rem;
}

.upload-button {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 4px;
    cursor: pointer;
    margin-top: 1rem;
    transition: background-color 0.3s ease;
}

.upload-button:hover {
    background-color: #e67300;
}

.file-info {
    margin-top: 1.5rem;
    text-align: center;
}

.scan-button {
    display: block;
    width: 100%;
    background-color: var(--secondary-color);
    color: white;
    border: none;
    padding: 0.75rem;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    margin-top: 1.5rem;
    transition: background-color 0.3s ease;
}

.scan-button:hover:not(:disabled) {
    background-color: #002a6e;
}

.scan-button:disabled {
    background-color: var(--border-color);
    cursor: not-allowed;
}

.results-container {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 2rem;
}

.results-container h2 {
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
    text-align: center;
}

.loader {
    border: 5px solid var(--border-color);
    border-top: 5px solid var(--primary-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 2rem auto;
}

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

.results {
    margin-top: 1.5rem;
}

.result-item {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.result-item.clean {
    background-color: rgba(76, 175, 80, 0.1);
    border-left: 4px solid var(--success-color);
}

.result-item.suspicious {
    background-color: rgba(255, 152, 0, 0.1);
    border-left: 4px solid var(--warning-color);
}

.result-item.malicious {
    background-color: rgba(244, 67, 54, 0.1);
    border-left: 4px solid var(--danger-color);
}

.back-button {
    display: block;
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    margin: 2rem auto 0;
    width: 200px;
    text-align: center;
    transition: background-color 0.3s ease;
}

.back-button:hover {
    background-color: #e67300;
}

footer {
    text-align: center;
    margin-top: 2rem;
    color: #777;
}