.file-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.file-card {
    background: #ffffff;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    border: 1px solid #e5e5e5;
}

    .file-card:hover {
        transform: translateY(-4px);
        box-shadow: 0 8px 20px rgba(0,0,0,0.12);
    }

.file-icon {
    font-size: 48px;
    color: #1e3a8a;
    margin-bottom: 10px;
}

.file-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: #333;
}

.file-actions {
    display: flex;
    gap: 10px;
}

.file-btn {
    flex: 1;
    padding: 10px 14px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: background 0.2s ease;
}

.open-btn {
    background: #e0e7ff;
    color: #1e3a8a;
}

    .open-btn:hover {
        background: #c7d2fe;
    }

.download-btn {
    background: #1e3a8a;
    color: white;
}

    .download-btn:hover {
        background: #162d6b;
    }