* {
    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%);
    color: #333;
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

header {
    text-align: center;
    margin-bottom: 30px;
}

h1 {
    color: #2c3e50;
    margin-bottom: 10px;
    font-size: 2.5rem;
}

h2 {
    color: #2c3e50;
    margin-bottom: 20px;
    text-align: center;
    font-size: 1.8rem;
}

p {
    color: #7f8c8d;
    font-size: 1.1rem;
}

.upload-section {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 30px;
    margin-bottom: 30px;
}

.upload-area {
    border: 3px dashed #3498db;
    border-radius: 8px;
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    margin-bottom: 20px;
    position: relative;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.upload-area:hover {
    border-color: #2980b9;
    background-color: #e8f4fc;
}

.upload-area.dragover {
    border-color: #27ae60;
    background-color: #e8f5e9;
}

.upload-placeholder {
    color: #7f8c8d;
}

.upload-icon {
    font-size: 48px;
    display: block;
    margin-bottom: 10px;
}

.btn {
    display: block;
    width: 100%;
    padding: 15px;
    background: linear-gradient(to right, #3498db, #2980b9);
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.15);
}

.btn:disabled {
    background: #bdc3c7;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

#previewImage {
    max-width: 100%;
    max-height: 300px;
    border-radius: 5px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.results-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 25px;
    margin-top: 20px;
}

.result-item {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
}

.result-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.result-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.result-info {
    padding: 15px;
    text-align: center;
}

.result-name {
    font-weight: bold;
    margin-bottom: 8px;
    color: #2c3e50;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.similarity-score {
    display: inline-block;
    padding: 5px 12px;
    background: linear-gradient(to right, #e74c3c, #c0392b);
    color: white;
    border-radius: 20px;
    font-size: 14px;
    font-weight: bold;
}

.loading {
    text-align: center;
    margin: 40px 0;
}

.spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #3498db;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

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

.error {
    background-color: #ffecec;
    color: #e74c3c;
    padding: 15px;
    border-radius: 8px;
    margin: 20px 0;
    text-align: center;
    border-left: 4px solid #e74c3c;
}

.hidden {
    display: none;
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .upload-section {
        padding: 20px;
    }
    
    .upload-area {
        padding: 20px;
        min-height: 150px;
    }
    
    .results-container {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 15px;
    }
}