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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: rgba(255,255,255,0.95);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

header {
    text-align: center;
    color: #333;
    margin-bottom: 30px;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    background: linear-gradient(45deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.controls {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

input, select {
    flex: 1;
    min-width: 200px;
    padding: 15px;
    border: 2px solid #e1e5e9;
    border-radius: 12px;
    font-size: 16px;
    transition: all 0.3s;
}

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

.files-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.file-card {
    background: white;
    border-radius: 16px;
    padding: 25px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    transition: all 0.3s;
    border-left: 5px solid #667eea;
    cursor: pointer;
}

.file-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}

.file-icon {
    font-size: 3.5rem;
    margin-bottom: 15px;
    display: block;
    text-align: center;
}

.file-header {
    margin-bottom: 15px;
}

.file-name {
    font-size: 1.3rem;
    font-weight: bold;
    color: #333;
    margin-bottom: 5px;
    word-break: break-word;
}

.file-desc {
    color: #666;
    font-size: 0.95rem;
}

.file-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    font-size: 0.9rem;
    color: #888;
}

.download-btn {
    width: 100%;
    padding: 15px;
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s;
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(102,126,234,0.4);
}

.loading, .no-files {
    text-align: center;
    padding: 60px 20px;
    font-size: 1.2rem;
    color: #666;
}

.stats {
    text-align: center;
    padding: 25px;
    background: rgba(102,126,234,0.1);
    border-radius: 15px;
    color: #333;
    font-weight: bold;
    font-size: 1.1rem;
}

@media (max-width: 768px) {
    .controls {
        flex-direction: column;
    }
    .files-container {
        grid-template-columns: 1fr;
    }
}